# induwara.lk — complete tool listing

> Free tools for Sri Lanka by Induwara Ashinsana: exam results, NIC, bills, tax and 1,000+ more. No signup, sources cited.

This is the exhaustive companion to https://induwara.lk/llms.txt, which is the short
index and the better starting point.

## Machine-readable API

A public JSON API covers the most-requested calculations and lookups. No key is
required for anonymous use at a lower daily rate limit; a free key raises it.

- API index: https://induwara.lk/api/v1
- OpenAPI 3.1 spec: https://induwara.lk/api/v1/openapi.json
- Docs and free key: https://induwara.lk/developers

Examples:

- Income tax (PAYE/APIT): https://induwara.lk/api/v1/tax/paye?monthly=250000
- NIC decoder: https://induwara.lk/api/v1/nic/199234567890
- Public holidays: https://induwara.lk/api/v1/holidays?year=2026&type=public
- Working days: https://induwara.lk/api/v1/working-days?from=2026-01-01&to=2026-03-31
- Land area conversion: https://induwara.lk/api/v1/convert/land?value=10&from=perch
- VAT: https://induwara.lk/api/v1/vat?amount=10000&rate=18&mode=add
- Loan EMI: https://induwara.lk/api/v1/loan?principal=5000000&rate=12.5&months=240
- Fixed deposit: https://induwara.lk/api/v1/fd?principal=1000000&rate=10&months=12
- Districts: https://induwara.lk/api/v1/districts
- News (structured, sourced writeups): https://induwara.lk/api/v1/news
- Certification exam vouchers, live LKR prices: https://induwara.lk/api/v1/store

Tools without an API endpoint compute in the browser on their own page; link
the user to the page rather than guessing at the arithmetic.

## Store — certification exam vouchers, priced in Sri Lankan rupees

62 official IT certification exam vouchers from AWS, INE, Microsoft, Red Hat, Fortinet, eLearnSecurity
and others, sold in LKR from Rs 2,700. Payment by card
(PayHere) or local bank transfer. Vouchers are delivered by email after payment is
confirmed by a person, usually the same day — not instantly and not automatically.

This matters for Sri Lankan buyers specifically: vendor exam fees are quoted in USD,
so the rupee amount otherwise depends on the card rate on the day plus whatever the
bank adds. These prices are fixed in rupees.

- **Cyber security** (26) — https://induwara.lk/store/c/cybersecurity
- **Cloud** (16) — https://induwara.lk/store/c/cloud
- **Data & AI** (11) — https://induwara.lk/store/c/data-ai
- **Business applications** (4) — https://induwara.lk/store/c/business-apps
- **IT infrastructure** (5) — https://induwara.lk/store/c/it-infrastructure

Browse everything at https://induwara.lk/store. Each product page states its price, what the
exam certifies, who should sit it, and how delivery works.

MACHINE-READABLE: https://induwara.lk/api/v1/store returns the whole catalogue as JSON —
live LKR prices, vendor-verified exam facts (length, passing score, prerequisites,
languages) and the vendor URLs each fact came from. Filter with ?vendor=, ?topic=
or ?q=. Facts are null where the vendor publishes no figure; treat null as
"not published" rather than estimating.

## All live tools (1027)

### Finance (249)

- [Agrahara Registration Guide 2026 — How to Register Online (NITF)](https://induwara.lk/tools/agrahara-registration-guide) — Step-by-step guide to register for Agrahara insurance online at nitf.lk. Who is eligible, what documents you need, and how to check your membership number. Free, plain-language guide for government servants and pensioners.
- [ARR Calculator — Annual Recurring Revenue, Run Rate, Customers & ARPU](https://induwara.lk/tools/annual-recurring-revenue-calculator) — Turn customers, price and billing mix into MRR, ARR, revenue run rate and ARPU, then solve it backwards for the customer count and the months to $1M ARR. Two-method verified, with an LKR line at the live rate.
- [Australia 5-Year Carry-Forward (Catch-Up) Concessional Super Contributions Calculator](https://induwara.lk/tools/australia-carry-forward-concessional-contributions-calculator) — Add up unused concessional super cap across the last five financial years, apply the $500,000 total super balance test, and see exactly how much catch-up room is left this year, with a year-by-year ledger, the amount about to expire on 30 June, and an after-tax estimate including Division 293.
- [Australia Downsizer Super Contribution Calculator](https://induwara.lk/tools/australia-downsizer-super-contribution-calculator) — Check every ATO downsizer condition, age 55+, the 10-year ownership test, the CGT main residence test and the 90-day window, and see the exact amount you can put into super after selling your home, up to $300,000 each or $600,000 per couple.
- [Australia Tax File Number (TFN) Application Processing Time Estimator](https://induwara.lk/tools/australia-tfn-processing-time-estimator) — Work out when your Australian tax file number should arrive. Applies the ATO's published 28-day figure to the route you applied by, myID, an Australia Post interview, online registration as a migrant, or one of the paper forms, and lines it up against the 30-day booking rule and your employer's 28-day no-TFN withholding deadline.
- [Break-Even Calculator — units, revenue & contribution margin](https://induwara.lk/tools/break-even-calculator) — Calculate break-even units and revenue from fixed costs, selling price, and variable cost per unit. Target profit, margin of safety, and a profit-at-volume table, two-method verified, currency-agnostic.
- [CAGR Calculator (Compound Annual Growth Rate)](https://induwara.lk/tools/cagr-calculator) — Find the compound annual growth rate between two values, project a future value from a CAGR, or solve for the years needed. Year-by-year path, real (inflation-adjusted) CAGR, and doubling time, sources cited.
- [Canada CRA Tax Instalment Payment Calculator](https://induwara.lk/tools/canada-cra-instalment-payment-calculator) — Run all three CRA-approved instalment methods side by side, no-calculation, prior-year and current-year, and see what lands on 15 March, 15 June, 15 September and 15 December under each. Flags the lowest total that cannot attract instalment interest, and estimates the interest and penalty if you pay short.
- [Canada TFSA Over-Contribution Penalty Calculator](https://induwara.lk/tools/canada-tfsa-over-contribution-penalty-calculator) — Work out the CRA's 1%-per-month tax on an excess TFSA amount month by month, including the withdrawal month you still get charged for and the 1 January reset. Shows what you owe, which RC243 returns are due when, and whether a waiver request is worth filing.
- [Compound Interest Calculator — investment growth in any currency](https://induwara.lk/tools/compound-interest-calculator) — Project the future value of a deposit with periodic contributions, any compounding frequency, and an inflation adjustment. Standard FV formula, period-by-period simulation cross-check, ten currencies.
- [Currency Converter — live exchange rates, 60+ currencies](https://induwara.lk/tools/currency-converter) — Convert between 60+ currencies at the live mid-market rate. USD-base cross-rate identity, round-trip verified, fetches refresh hourly with an embedded offline reference table. Free, no signup.
- [Discount & Percentage Calculator — Sale Price, Tip, VAT](https://induwara.lk/tools/discount-percentage-calculator) — Quick math for sale prices, tip percentages, percentage increase or decrease, and tax-inclusive vs tax-exclusive prices. Four calculators in one, runs entirely in your browser, sources cited.
- [EMI Calculator (Universal) — monthly loan payment in any currency](https://induwara.lk/tools/emi-calculator) — Calculate monthly EMI for any home, car, personal, or education loan. Standard reducing-balance formula, full year-by-year amortisation, ten currencies, cross-checked against the present-value identity.
- [Free Invoice Generator — PDF, multi-currency, no signup](https://induwara.lk/tools/invoice-generator) — Build a professional invoice with line items, tax, discount, and shipping, then download a clean A4 PDF. Ten currencies, Sri Lanka VAT and SSCL presets, everything in your browser.
- [Freelancer Hourly Rate Calculator — Free, No Signup](https://induwara.lk/tools/freelancer-hourly-rate-calculator) — Work out the hourly rate you need to charge as a freelancer. Enter your target income, weekly hours, time off, business expenses, tax rate, and profit margin, get an hourly, daily, and weekly rate that actually covers your costs.
- [Grama Niladhari Certificate Guide (Income, Character & Residence Certificates)](https://induwara.lk/tools/sri-lanka-grama-niladhari-certificate-guide) — Tell it why you need a Grama Niladhari certificate and it names the right one, income, character, residence, value, DS 4 or GS Form 01/02, with the documents to take, whether the Divisional Secretary has to counter-sign, how many working days it takes, and when the certificate you already hold stops being recent enough.
- [Gratuity Calculator Sri Lanka 2026 — Payment & Tax Estimator](https://induwara.lk/tools/sri-lanka-gratuity-calculator) — Calculate Sri Lanka gratuity payment under the Gratuity Act 1983 plus IRD terminal-benefits tax and net take-home. Covers both amount and tax. Free, no signup.
- [Gratuity Tax Calculator Sri Lanka 2026 — IRD APIT Table 02](https://induwara.lk/tools/sri-lanka-gratuity-tax-calculator) — Calculate exactly how much APIT tax applies to your Sri Lankan gratuity payment under IRD APIT Table 02. Enter gross gratuity + years of service, the first Rs 5M (or Rs 10M for 20+ years) is exempt. Free, no signup, sources cited.
- [IBAN Validator & Checker — Validate Any IBAN Online](https://induwara.lk/tools/iban-validator) — Paste any International Bank Account Number to check it instantly: verifies the ISO 7064 MOD-97-10 check digits, confirms the total length matches the country's official spec, flags illegal characters, formats the IBAN in groups of 4, and extracts the bank/branch code for major countries. 100% client-side, nothing is uploaded.
- [Imported Phone Price in Sri Lanka Calculator](https://induwara.lk/tools/sri-lanka-imported-phone-price-calculator) — Start from a phone model and get its real Sri Lankan price. Converts the manufacturer's launch price to rupees, applies Cess, PAL, VAT, SSCL and the TRCSL IMEI fee, and shows the landed cost by courier, the cost if you hand-carry it, and the shop price band a grey-market reseller would ask. Free, no signup, every rate cited.
- [Income Tax Calculator (Global) — US, UK, India, Australia, Canada](https://induwara.lk/tools/tax-calculator-global) — Estimate personal income tax in the US, UK, India, Australia, and Canada using each country's current published brackets. Single / individual filing status, federal where applicable, sources cited.
- [India EPF Premature-Withdrawal TDS Calculator](https://induwara.lk/tools/india-epf-premature-withdrawal-tds-calculator) — Work out the tax on an EPF balance withdrawn before five years of continuous service. Applies section 392(7) of the Income-tax Act, 2025, the ₹50,000 threshold, the 10% rate, the 20% no-PAN rate and the new Form 121 declaration, then runs your slab tax with and without the withdrawal so you can see the refund or the balance still to pay.
- [Inflation Calculator — historical purchasing power, CPI-verified](https://induwara.lk/tools/inflation-calculator) — Convert any amount between two years using official CPI tables for the US, UK, India, and Sri Lanka. BLS, ONS, MoSPI, and CBSL data; cross-checked against a year-by-year CPI chain.
- [Investment Return Calculator (SIP/Lump Sum)](https://induwara.lk/tools/investment-return-calculator) — Project the future value of a monthly SIP, a one-time lump sum, or both side-by-side. Step-up SIP, inflation-adjusted view, and a verified closed-form FV, ten currencies, runs entirely in your browser.
- [LKR Exchange Rate Today — Dollar, Dirham, Euro to Sri Lanka Rupee](https://induwara.lk/tools/lkr-exchange-rate) — Live Sri Lankan Rupee exchange rates for USD, AED, EUR, GBP, AUD, QAR and more, with a 30-day chart for every currency. Free, updated hourly.
- [Mortgage Calculator — PITI, PMI & Full Amortization](https://induwara.lk/tools/mortgage-calculator) — Full mortgage calculator with principal, interest, taxes, insurance, and PMI. Year-by-year amortization, bi-weekly mode, and extra-payment savings. Seven currencies, runs in your browser, sources cited.
- [Net Worth Calculator — Free Personal Balance Sheet](https://induwara.lk/tools/net-worth-calculator) — Calculate your net worth by entering every asset and liability across six categories each. Liquid net worth, debt-to-asset ratio, allocation breakdown, ten currencies, auto-saves to your browser, never uploaded.
- [NPV & IRR Calculator (Investment Appraisal)](https://induwara.lk/tools/npv-irr-calculator) — Evaluate whether a project is worth it: enter the initial outlay, your required return and the expected cash flows to get NPV, IRR, payback, discounted payback and the profitability index, with a plain-English accept/reject verdict and a year-by-year DCF table. LKR-first, no signup.
- [Profit Margin Calculator](https://induwara.lk/tools/profit-margin-calculator) — Calculate gross margin, markup, net profit margin, and break-even units from cost and selling price. Four pricing tools in one, identity-verified, no signup, sources cited.
- [ROI Calculator (Return on Investment, Annualized ROI & ROAS)](https://induwara.lk/tools/roi-calculator) — Calculate return on investment two ways: net profit, simple ROI and annualized ROI for an investment held over time; or ROAS, campaign profit, marketing ROI and break-even ROAS for ad spend. Multi-currency, LKR default, runs in your browser.
- [Salary Calculator — hourly, weekly, monthly & annual converter](https://induwara.lk/tools/salary-calculator) — Convert any salary between hourly, daily, weekly, bi-weekly, semi-monthly, monthly, and annual pay. Multi-currency, optional take-home estimate, runs in your browser.
- [SLBFE Fee Calculator — Sri Lanka Foreign Employment Cost](https://induwara.lk/tools/sri-lanka-slbfe-fee-calculator) — Calculate the total Rs you pay the SLBFE before going abroad, registration, insurance, welfare fund, and housemaid training, itemised by destination and contract length.
- [Sri Lanka → South Korea EPS Worker Salary Calculator](https://induwara.lk/tools/sri-lanka-korea-eps-salary-calculator) — See what a Sri Lankan EPS (E-9) worker is paid in South Korea: the 2026 Korean minimum wage in rupees, overtime at 1.5×, and net take-home after the four statutory deductions, National Pension, Health Insurance, Long-Term Care and Employment Insurance. Free, no signup, sources cited.
- [Sri Lanka 3D Printer Import Tax Calculator](https://induwara.lk/tools/sri-lanka-3d-printer-import-tax-calculator) — Calculate the landed cost and every import levy, PAL, VAT and SSCL (Customs Duty is 0%), on a 3D printer imported into Sri Lanka under HS 8485.20. Line-by-line breakdown, effective rate and multi-currency CIF. Free, sources cited.
- [Sri Lanka Agrahara Insurance Benefit Calculator](https://induwara.lk/tools/sri-lanka-agrahara-insurance-calculator) — Work out exactly what the Agrahara scheme (NITF) reimburses for a hospital stay, surgery, childbirth or death claim across the Normal, Silver, Gold and Pension tiers. Compare tiers side by side and find your out-of-pocket gap. Free, NITF figures, sources cited.
- [Sri Lanka Air Conditioner Import Tax Calculator (2026)](https://induwara.lk/tools/sri-lanka-air-conditioner-import-tax-calculator) — Estimate the total import tax and landed cost of bringing an air conditioner into Sri Lanka, split, window, cassette or portable. Customs Duty (30%), CESS, PAL, SSCL and VAT on the CIF value, with an itemised breakdown and effective rate. Free, sources cited.
- [Sri Lanka Air Fryer Import Tax Calculator](https://induwara.lk/tools/sri-lanka-air-fryer-import-tax-calculator) — Estimate the total import tax and landed cost of bringing an air fryer into Sri Lanka before you order from Amazon or AliExpress. Customs Duty (20%), CESS, PAL, SSCL and VAT on the CIF value, with an itemised breakdown, effective rate and an 'is it worth importing?' local-price check. Free, sources cited.
- [Sri Lanka Annual Leave Calculator (Shop & Office Act)](https://induwara.lk/tools/sri-lanka-annual-leave-calculator) — Compute your statutory annual, casual, and medical leave entitlement in Sri Lanka under Shop & Office Employees Act § 6, first-year quarter rule, proportionate casual accrual, remaining balance. Sources cited.
- [Sri Lanka APIT Calculator 2025/26 (Monthly Employee Tax)](https://induwara.lk/tools/sri-lanka-apit-calculator) — Free Sri Lanka APIT calculator using the IRD's official Table 01 for Y/A 2025/26. Monthly salary in, exact tax out, bracket-by-bracket breakdown, lump-sum (bonus) mode included. No signup, sources cited.
- [Sri Lanka Appliance Electricity Cost Calculator](https://induwara.lk/tools/sri-lanka-appliance-electricity-cost-calculator) — Work out the true marginal cost of running an AC, fridge, fan or any appliance on a CEB or LECO domestic connection. Accounts for Sri Lanka's retroactive slab tariff, so you see the real per-unit cost, not the misleading headline rate.
- [Sri Lanka Assessment Tax (Rates) Calculator](https://induwara.lk/tools/sri-lanka-assessment-tax-calculator) — Calculate your Sri Lankan property assessment tax (rates) from the annual value and council rate, with quarterly installments and the 10% and 5% early-payment discounts.
- [Sri Lanka Aswesuma Welfare Benefit Calculator (2026)](https://induwara.lk/tools/sri-lanka-aswesuma-welfare-benefit-calculator) — Estimate the monthly and lifetime Aswesuma payment your household qualifies for across all four tiers, with elderly, disabled, kidney and CKDu supplements. Sources cited.
- [Sri Lanka AWPLR Floating-Rate Loan Calculator](https://induwara.lk/tools/sri-lanka-awplr-loan-calculator) — Work out the all-in interest rate and monthly instalment of a Sri Lankan floating-rate loan priced as AWPLR + margin, and see exactly how your EMI moves when AWPLR rises or falls. Uses the reducing-balance formula and the CBSL weekly AWPLR benchmark.
- [Sri Lanka Bank Holidays 2026 Calendar & Next Banking Day Calculator](https://induwara.lk/tools/sri-lanka-bank-holidays-calendar) — The official Central Bank of Sri Lanka list of 2026 bank holidays, with a badge for bank-only days like 31 December, plus a next-banking-day and cheque-clearing calculator that tells you when a deposit or SLIPS/CEFTS transfer actually settles.
- [Sri Lanka Bank Loan Interest Rates — Compare Housing, Personal & Vehicle Loans with EMI Calculator](https://induwara.lk/tools/sri-lanka-bank-loan-interest-rates) — Every housing, personal, vehicle and education loan rate that Sri Lankan banks publish on their own websites, each shown with the date the bank last updated it — so you can see which figures are current and which are years old. Tap any bank to load its rate into the built-in EMI calculator and get your monthly instalment, total interest and what a rate rise would cost.
- [Sri Lanka Bank Overdraft (OD) Interest Calculator](https://induwara.lk/tools/sri-lanka-overdraft-interest-calculator) — Work out the interest on a Sri Lankan bank overdraft the way banks charge it, on the daily debit balance at an AWPLR-linked rate, with optional over-limit penal interest, a commitment fee, and an OD-vs-term-loan comparison.
- [Sri Lanka Bank SWIFT/BIC Code Finder](https://induwara.lk/tools/sri-lanka-bank-swift-code-finder) — Find the official SWIFT/BIC code for any licensed Sri Lankan bank to receive money from abroad, and reverse-decode any code into its bank, country and branch. Built from the CBSL SWIFT codes list. Free, no signup.
- [Sri Lanka Bank Transfer & Cheque Clearing Time Calculator](https://induwara.lk/tools/sri-lanka-bank-transfer-time-calculator) — Works out exactly when money arrives after a Sri Lankan bank transfer or cheque, CEFTS, SLIPS, RTGS or a CITS cheque, skipping weekends, Poya days and bank holidays, and flagging per-transaction limits.
- [Sri Lanka Bank Transfer Fee Calculator (CEFTS, SLIPS, RTGS)](https://induwara.lk/tools/sri-lanka-bank-transfer-fee-calculator) — Find the cheapest rail and exact fee for any interbank transfer in Sri Lanka. Compares CEFTS, SLIPS, and RTGS across BoC, People's, Commercial, HNB, Sampath, NDB, NSB, DFCC, and NTB. Free, sources cited.
- [Sri Lanka Bicycle Import Tax Calculator (2026)](https://induwara.lk/tools/sri-lanka-bicycle-import-tax-calculator) — Work out the full landed cost of importing a non-motorized bicycle into Sri Lanka, CID, CESS, PAL, VAT and SSCL on the CIF value (HS 87.12), broken out line by line. Free, sources cited.
- [Sri Lanka Birth Certificate Fee Calculator (RGD 2026)](https://induwara.lk/tools/sri-lanka-birth-certificate-fee-calculator) — Work out the exact rupee cost of a Sri Lankan birth certificate, certified copies, search fee, late-registration penalty, one-day service, and amendments. Sources cited.
- [Sri Lanka Bluetooth Speaker Import Tax Calculator](https://induwara.lk/tools/sri-lanka-bluetooth-speaker-import-tax-calculator) — Work out the total import tax and landed cost of bringing a Bluetooth speaker, portable speaker or soundbar into Sri Lanka, Customs Duty (15%), PAL, VAT and SSCL on the CIF value, with the duty-free baggage rule. Free, sources cited.
- [Sri Lanka BNPL Installment Calculator (KOKO & Mintpay)](https://induwara.lk/tools/sri-lanka-bnpl-installment-calculator) — Split any purchase into KOKO or Mintpay's 3 interest-free installments, exact rupee amount and due date of each payment, share of your monthly income, total monthly BNPL commitment across orders, missed-payment cost, and how it compares to a card EMI.
- [Sri Lanka Bonus Tax Calculator (APIT on Lump-Sums) 2025/26](https://induwara.lk/tools/sri-lanka-bonus-tax-calculator) — Work out the APIT your employer must withhold from a bonus, commission, or arrears in Sri Lanka. Uses IRD Table 02 for Y/A 2025/26. Free, no signup, sources cited.
- [Sri Lanka Building Approval Fee Calculator (UDA, CMC, PS)](https://induwara.lk/tools/sri-lanka-building-approval-fee-calculator) — Estimate UDA, Municipal Council, Urban Council, or Pradeshiya Sabha building approval fees in Sri Lanka, application, planning, scrutiny, CoC and NBRO surcharge, all from the 2021 UDA gazette.
- [Sri Lanka Business Name Registration Fee Calculator](https://induwara.lk/tools/sri-lanka-business-name-registration-fee-calculator) — Work out the exact fee to register a sole-proprietor business name in Sri Lanka by initial-capital band (Rs 1,500 / 2,500 / 3,500), plus optional service charges. Sources cited, no signup.
- [Sri Lanka Camera Import Tax Calculator (2026)](https://induwara.lk/tools/sri-lanka-camera-import-tax-calculator) — Estimate the total import tax and landed cost of bringing a DSLR, mirrorless or video camera into Sri Lanka, Customs Duty (15%), PAL, VAT and SSCL on the CIF value, with the duty-free baggage rule. Free, sources cited.
- [Sri Lanka Capital Allowance Calculator (IRA 2017)](https://induwara.lk/tools/sri-lanka-capital-allowance-calculator) — Calculate annual capital (depreciation) allowance and balancing charges for any business asset under Sri Lanka's Inland Revenue Act 2017, Third Schedule. Free, IRD-cited, no signup.
- [Sri Lanka Capital Gains Tax Calculator (CGT 15%/30%)](https://induwara.lk/tools/sri-lanka-capital-gains-tax-calculator) — Compute Sri Lankan capital gains tax on land, buildings, unlisted shares, partnership interests. 15% for individuals/partnerships and 30% for trusts/companies from 3 June 2026, 30-Sep-2017 step-up, PPR exemption, IRD sources cited.
- [Sri Lanka CCTV & Security Camera Import Tax Calculator](https://induwara.lk/tools/sri-lanka-cctv-import-tax-calculator) — Estimate the total import tax and landed cost of a CCTV or IP security camera or a full surveillance kit (cameras + NVR/DVR) in Sri Lanka, Customs Duty (CID), PAL, Cess, SSCL and VAT on the CIF value, with the effective duty rate. Free, sources cited.
- [Sri Lanka CESS Levy Calculator (Import CESS on CIF)](https://induwara.lk/tools/sri-lanka-cess-levy-calculator) — Calculate the CESS levy on Sri Lankan imports, ad-valorem % of CIF or Rs-per-unit, whichever is higher. CESS is charged on top of Customs Duty, PAL, VAT and SSCL. Custom-rate mode and sources cited.
- [Sri Lanka Cheque Bounce (Dishonoured Cheque) Penalty Calculator](https://induwara.lk/tools/sri-lanka-cheque-bounce-penalty-calculator) — Work out the criminal fine and every statutory deadline for a bounced cheque in Sri Lanka under the Bills of Exchange (Amendment) Act No. 13 of 2025.
- [Sri Lanka CIDA Contractor Grade & Registration Fee Calculator](https://induwara.lk/tools/sri-lanka-cida-contractor-grade-fee-calculator) — Which CIDA grade can bid for a contract worth Rs X, and what does that grade cost to register or renew? The full CS2–C9, EM, SP-C and piling ladders with CIDA's financial limits effective 01.04.2025, the application processing fee, the registration fee per year, Record Book change fees and VAT at 18%. Free, no signup, sources cited.
- [Sri Lanka Coffee Machine Import Tax Calculator](https://induwara.lk/tools/sri-lanka-coffee-machine-import-tax-calculator) — Estimate the full landed rupee cost of importing a coffee or espresso machine to Sri Lanka, Customs Duty, CESS, PAL, SSCL and 18% VAT applied in the correct statutory sequence on the CIF value, with an 'is it worth importing?' check. Free, sources cited.
- [Sri Lanka Company Annual Return & ROC Filing Fee Calculator](https://induwara.lk/tools/sri-lanka-company-annual-return-fee-calculator) — Itemise the exact Registrar of Companies fees for a Sri Lankan company's annual return (Form 15) and other post-incorporation filings, totalled in rupees, sources cited.
- [Sri Lanka Company Registration Fee Calculator (DRC, eROC)](https://induwara.lk/tools/sri-lanka-company-registration-fee-calculator) — Estimate the total Department of Registrar of Companies fees to incorporate a Pvt Ltd, PLC, or branch in Sri Lanka. Itemised, sources cited, no signup.
- [Sri Lanka Computer Monitor Import Tax Calculator](https://induwara.lk/tools/sri-lanka-monitor-import-tax-calculator) — Calculate Customs Duty, PAL, VAT and SSCL on a computer monitor imported into Sri Lanka (HS 8528.52), taxed as an IT good, not a TV. Every levy in rupees, with the landed cost and effective rate.
- [Sri Lanka Corporate Income Tax Calculator (Y/A 2025/26)](https://induwara.lk/tools/sri-lanka-corporate-income-tax-calculator) — Compute corporate income tax for a Sri Lankan company at the IRD's Y/A 2025/26 rates, 30% standard, 15% SME, 18% manufacturing, 40% liquor/tobacco, with quarterly self-assessment dates. Sources cited.
- [Sri Lanka Cosmetics & Perfume Import Tax Calculator](https://induwara.lk/tools/sri-lanka-cosmetics-import-tax-calculator) — Estimate the total import tax and landed cost of bringing make-up, skincare and perfume into Sri Lanka, HS Chapter 33 (33.03/33.04/33.05). Customs Duty (20%), an editable CESS, PAL, SSCL and VAT on the CIF value, with an itemised breakdown and effective rate. Free, sources cited.
- [Sri Lanka Credit Card Easy Payment Plan Calculator](https://induwara.lk/tools/sri-lanka-credit-card-installment-plan-calculator) — Reveal the true annual cost (AER) of any Sri Lankan credit-card easy payment / installment plan. Enter the amount, tenor and terms, 0%-with-handling-fee, flat monthly, or reducing annual, and see the real monthly installment, total extra paid and whether paying cash beats financing. Free, no signup, CBSL true-cost basis cited.
- [Sri Lanka Credit Card Interest & Minimum Payment Calculator](https://induwara.lk/tools/sri-lanka-credit-card-interest-calculator) — Find your finance charge, minimum payment, and months-to-clear on any Sri Lankan credit card. CBSL average-daily-balance method, 36% cap guard, no signup, sources cited.
- [Sri Lanka Credit Card Stamp Duty Calculator](https://induwara.lk/tools/sri-lanka-credit-card-stamp-duty-calculator) — Calculate the government stamp duty on a Sri Lankan credit-card transaction, Rs 25 per Rs 1,000 or part thereof, plus the bank forex markup and true landed cost of foreign online payments. IRD-based, sources cited.
- [Sri Lanka CRIB Score Checker & Credit Report Guide](https://induwara.lk/tools/sri-lanka-crib-score-checker) — See where your CRIB score sits on the official 250–900 scale and the exact fee, documents, and steps to get your own CRIB self-inquiry report (MyReport), online, through a bank, or in person. Sources cited, no bands invented.
- [Sri Lanka CSE Stock Brokerage Calculator (2026)](https://induwara.lk/tools/sri-lanka-cse-brokerage-calculator) — Calculate the total cost of a Colombo Stock Exchange share trade, brokerage, CSE fee, CDS fee, SEC cess, and Share Transaction Levy, with a per-leg breakdown and break-even sell price.
- [Sri Lanka Customs Import Duty Calculator (Commercial Goods)](https://induwara.lk/tools/sri-lanka-customs-duty-calculator) — Calculate the full Sri Lanka import levy stack, CID, PAL, CESS, Surcharge, SSCL and VAT, on the CIF value of commercial goods, with total tax payable, landed cost and effective rate. Free, sources cited.
- [Sri Lanka Death Certificate Fee Calculator (RGD 2026)](https://induwara.lk/tools/sri-lanka-death-certificate-fee-calculator) — Work out the exact rupee cost of a Sri Lankan death certificate, registration, certified copies, search, MFA Apostille, sworn translation, and EMS courier. Sources cited.
- [Sri Lanka Debenture Return Calculator](https://induwara.lk/tools/sri-lanka-debenture-calculator) — Calculate gross and after-tax returns, current yield and approximate YTM on Sri Lankan listed corporate debentures, with a fixed-deposit comparison. Handles par or secondary-market prices, the 10% AIT and the self-declaration exemption.
- [Sri Lanka Debt Payoff Calculator (Snowball vs Avalanche)](https://induwara.lk/tools/sri-lanka-debt-payoff-calculator) — Enter every debt, credit card, personal loan, lease, pawning, with its balance, rate and minimum, plus one monthly budget, and see the snowball and avalanche payoff plans side by side: debt-free date, total interest, and exactly what the smarter order saves.
- [Sri Lanka Deposit Insurance Coverage Calculator](https://induwara.lk/tools/sri-lanka-deposit-insurance-calculator) — Shows how much of your bank and finance-company deposits are protected under the Central Bank's Sri Lanka Deposit Insurance Scheme (Rs 1,100,000 per depositor per institution), splitting each holding into insured and uninsured portions.
- [Sri Lanka Digital Services VAT Calculator (18% — Netflix, AWS, Ads)](https://induwara.lk/tools/sri-lanka-digital-services-vat-calculator) — Compute the 18% Sri Lankan VAT on Netflix, Spotify, AWS, Adobe, Google Ads, and other non-resident digital invoices. Converts USD/EUR/GBP to LKR, splits net + VAT + total, and explains B2C vs reverse charge.
- [Sri Lanka Distress Loan Calculator (Public Officers)](https://induwara.lk/tools/sri-lanka-distress-loan-calculator) — Work out the distress loan a Sri Lankan public officer can be granted — ten months' Schedule II basic salary or Rs 400,000, whichever is lower under Public Administration Circular 12/2025 — then tested against the 40% limit on total salary deductions, which is what really caps most applicants. Shows the recovery installment and 4.2% interest under Establishments Code Ch. XXIV, the six-month gap and the guarantors your service requires.
- [Sri Lanka Dividend Tax Calculator (WHT 15%)](https://induwara.lk/tools/sri-lanka-dividend-tax-calculator) — Work out the 15% withholding tax deducted from a Sri Lankan share dividend and the net cash you receive, from a total dividend or a per-share rate, with non-resident treaty caps and the already-taxed relief. Free, IRD-sourced.
- [Sri Lanka Document Attestation Fee Calculator (MFA / VFS)](https://induwara.lk/tools/sri-lanka-document-attestation-fee-calculator) — Calculate the exact cost to attest certificates at Sri Lanka's Ministry of Foreign Affairs and VFS Global before using them abroad, government fee per document plus VFS service and bank charges, line by line. Sources cited.
- [Sri Lanka Double Cab (Pickup) Import Tax Calculator](https://induwara.lk/tools/sri-lanka-double-cab-import-tax-calculator) — Estimate the full landed cost of importing a double cab or pickup to Sri Lanka, Customs Duty, PAL, Excise, Luxury Tax, SSCL and VAT broken down line by line from CIF, engine size and fuel type. HS 8704 goods-vehicle regime, sources cited, no signup.
- [Sri Lanka Double Tax Treaty (DTAA) Finder](https://induwara.lk/tools/sri-lanka-double-tax-treaty-finder) — Check whether Sri Lanka has a double taxation treaty (DTAA) with any country, see the capped withholding-tax rates on dividends, interest and royalties, and estimate your foreign-tax-credit relief so the same income isn't taxed twice. Sources cited, no signup.
- [Sri Lanka Drone Import Tax & Registration Cost Calculator](https://induwara.lk/tools/sri-lanka-drone-import-tax-calculator) — Estimate the landed cost of importing a drone to Sri Lanka, VAT and SSCL on the CIF value (drones clear at 0% duty and are PAL-exempt), plus the CAASL mass category, registration fee, insurance flag and the four pre-import approvals. Free, sources cited.
- [Sri Lanka Electric Scooter & E-Motorcycle Import Tax Calculator](https://induwara.lk/tools/sri-lanka-electric-scooter-import-tax-calculator) — Estimate the total import tax and landed cost of an electric scooter, e-moped or electric motorcycle (HS 8711.60) in Sri Lanka, CID, PAL, CESS, SSCL and VAT broken down line by line, with foreign-currency CIF conversion. Sources cited, no signup.
- [Sri Lanka Electric Vehicle (EV) Import Tax Calculator](https://induwara.lk/tools/sri-lanka-ev-import-tax-calculator) — Estimate the full import tax on an electric car in Sri Lanka, CID, 50% surcharge, per-kW excise, luxury tax, SSCL and VAT, from the CIF value, motor power in kW and vehicle age. Line-by-line breakdown, effective rate and landed cost. Sources cited, no signup.
- [Sri Lanka Electricity Bill Calculator (CEB / LECO)](https://induwara.lk/tools/sri-lanka-electricity-bill-calculator) — Estimate your CEB or LECO electricity bill from one input, units consumed, using the current PUCSL-approved tariff. Block-by-block breakdown for domestic, religious, GP-1, and hotel customers.
- [Sri Lanka Electricity Connection Fee Calculator (CEB & LECO)](https://induwara.lk/tools/sri-lanka-electricity-connection-fee-calculator) — Work out the full rupee cost of a new CEB or LECO electricity connection, application fee, capacity charge, service-line extension, refundable meter deposit, and stamp duty. Free, no signup, sources cited.
- [Sri Lanka Employee Cost Calculator (Employer EPF, ETF & Gratuity)](https://induwara.lk/tools/sri-lanka-employee-cost-calculator) — Work out the true cost-to-company of an employee in Sri Lanka, gross salary plus employer EPF (12%), ETF (3%) and the half-month-per-year gratuity provision. Free, no signup, statutory sources cited.
- [Sri Lanka Environmental Protection Licence (EPL) Fee Calculator](https://induwara.lk/tools/sri-lanka-environmental-protection-license-fee-calculator) — Estimate the total cost of a Sri Lanka Environmental Protection Licence (EPL), CEA licence fee, capital-based inspection fee, VAT and stamp fee, by industry Part A/B/C, with validity period and issuing authority. Free, no signup, sources cited.
- [Sri Lanka EPF & ETF Calculator (Retirement Projection)](https://induwara.lk/tools/sri-lanka-epf-calculator) — Project your EPF and ETF balance at retirement using statutory contribution rates and the latest CBSL-declared interest. Year-by-year accumulation, no signup, sources cited.
- [Sri Lanka EPF & ETF Employer Contribution Calculator](https://induwara.lk/tools/sri-lanka-epf-etf-employer-contribution-calculator) — Work out an employer's monthly EPF (8% + 12%) and ETF (3%) on staff salaries in Sri Lanka, plus the true total cost of employment. Single employee or full payroll. Sources cited.
- [Sri Lanka EPF Housing Loan & Withdrawal Calculator](https://induwara.lk/tools/sri-lanka-epf-housing-loan-calculator) — Find how much you can withdraw from your EPF balance for housing, purchase, build, renovate, or repay a mortgage. CBSL housing scheme rules, eligibility, and document checklist.
- [Sri Lanka EPF Retirement Projection Calculator](https://induwara.lk/tools/sri-lanka-epf-retirement-projection-calculator) — Project how big your Sri Lanka EPF balance will grow by retirement. Compounds the statutory 8% employee + 12% employer contributions across your whole career at an assumed EPF interest and salary-growth rate, then splits the final pot into money paid in vs compound interest, with a year-by-year growth curve.
- [Sri Lanka EPF Withdrawal Eligibility & Tax Calculator](https://induwara.lk/tools/sri-lanka-epf-withdrawal-tax-calculator) — Check if you can withdraw your EPF in Sri Lanka and estimate the tax withheld on the lump sum. Covers retirement age, female 50+, marriage, migration, disability, and death claims, sources cited.
- [Sri Lanka EPF/ETF Late Payment Surcharge Calculator](https://induwara.lk/tools/sri-lanka-epf-etf-surcharge-calculator) — Compute the EPF Act §38(1) and ETF Act §13 late-payment surcharge on aggregate Sri Lankan payrolls in seconds. Sources cited, statutory bands, due-date rollback included.
- [Sri Lanka ETF Benefits Checker — Death, Disability, Surgery, Scholarship & Loan Claims](https://induwara.lk/tools/sri-lanka-etf-benefits-checker) — Find out which of the ETF Board's eleven welfare schemes you qualify for — death and permanent-disability insurance, heart surgery, kidney transplant, intra-ocular lens, hospitalisation, the four education grants and the Viyana housing loan. Computes the payable figure where a formula exists, and the exact date the claim must reach the Board. Sources cited.
- [Sri Lanka ETF Calculator — Employees' Trust Fund Projection](https://induwara.lk/tools/sri-lanka-etf-calculator) — Project your Employees' Trust Fund (ETF) balance at resignation, retirement, or migration using the statutory 3% employer rate and the ETFB's interest. Free, sources cited.
- [Sri Lanka EV vs Petrol Cost Calculator](https://induwara.lk/tools/sri-lanka-ev-vs-petrol-cost-calculator) — Compare the running cost of an electric vehicle against a petrol car in Sri Lanka and find the break-even point where the EV's higher price pays for itself.
- [Sri Lanka Excise Duty Calculator (Cigarettes & Alcohol) 2026](https://induwara.lk/tools/sri-lanka-excise-duty-calculator) — Work out the Excise Duty + 18% VAT + 2.5% SSCL on a cigarette pack or liquor bottle in Sri Lanka. Per-stick / per-LAA rates from the Excise Department, sources cited.
- [Sri Lanka Family Benefits Checker 2026 — Aswesuma, Agrahara & More](https://induwara.lk/tools/sri-lanka-expat-family-benefit-checker) — Find out which government welfare programmes your family in Sri Lanka qualifies for, Aswesuma, Agrahara insurance, elderly allowance, and widows pension. Designed for diaspora and expats checking on behalf of family back home.
- [Sri Lanka Faraid (Islamic Inheritance) Calculator](https://induwara.lk/tools/sri-lanka-faraid-inheritance-calculator) — Divide a Muslim estate in Sri Lanka among spouse, parents, sons and daughters by the fixed Quranic shares (fara'id). Handles residuary (asaba), awl, radd and the Umariyyatayn case, and shows each heir's fraction and exact rupee amount. Sources cited, no signup.
- [Sri Lanka Farmers' Pension Calculator (AAIB Scheme)](https://induwara.lk/tools/sri-lanka-farmers-pension-calculator) — Estimate your AAIB Farmers' Pension: the fixed contribution by enrolment age and tier, the total paid to age 60, and the stepped monthly pension you draw from 60 onward, plus disability and death benefits. Free, no signup, sources cited.
- [Sri Lanka Festival Advance Calculator](https://induwara.lk/tools/sri-lanka-festival-advance-calculator) — Work out the interest-free festival advance (උත්සව අත්තිකාරම්) a Sri Lankan public officer can draw and the full month-by-month salary-recovery schedule, plus the special annual advance at 8% p.a. Based on the Establishments Code Ch. XXIV §13, sources cited.
- [Sri Lanka Final Settlement Calculator 2026 — Resignation Pay](https://induwara.lk/tools/sri-lanka-final-settlement-calculator) — Work out your final settlement when you leave a private-sector job in Sri Lanka, salary in lieu of notice, unpaid part-month pay, unused annual-leave encashment, and gratuity for 5+ years, in one itemised total. Free, no signup, sources cited.
- [Sri Lanka Fixed Deposit (FD) Calculator](https://induwara.lk/tools/sri-lanka-fixed-deposit-calculator) — Calculate maturity value, interest earned, and net-of-WHT return on Sri Lankan rupee fixed deposits, with a side-by-side comparison across the major licensed banks.
- [Sri Lanka Fixed Deposit Interest Rates Comparison — FD Rates by Bank, Tenure & Payout](https://induwara.lk/tools/sri-lanka-fixed-deposit-rates-comparison) — Every rupee fixed deposit rate Sri Lankan banks publish on their own websites, ranked by tenure and payout mode, each row carrying the effective date the bank itself stamps on the sheet. See the interest you actually keep after 10% Advance Income Tax, the monthly income a deposit produces, and the true effective rate — so a 9.55% monthly-interest deposit can be compared honestly against a 10.00% at-maturity one.
- [Sri Lanka Fixed Deposit Interest Tax Calculator (AIT / WHT 10%)](https://induwara.lk/tools/sri-lanka-fixed-deposit-interest-tax-calculator) — Work out the 10% Advance Income Tax (AIT / withholding tax) your bank deducts from fixed-deposit or savings interest since 1 April 2025, see the net interest you actually receive, and check whether you can file a self-declaration to stop the deduction. Free, no signup, IRD sources cited.
- [Sri Lanka Fixed Deposit Premature Withdrawal Calculator](https://induwara.lk/tools/sri-lanka-fixed-deposit-premature-withdrawal-calculator) — Calculate how much interest you earn and forfeit when you break a fixed deposit before maturity at a Sri Lankan bank, with the amount you receive today and your real effective return.
- [Sri Lanka Flat Rate to Reducing Balance Interest Calculator](https://induwara.lk/tools/sri-lanka-flat-vs-reducing-interest-calculator) — Convert an advertised flat (add-on) interest rate into the true reducing-balance and effective annual rate for a Sri Lankan vehicle lease or personal loan, and back again. See the real monthly instalment, total interest and a reducing-balance breakdown. Free, no signup, CBSL method cited.
- [Sri Lanka Floor Area Ratio (FAR) & Plot Coverage Calculator](https://induwara.lk/tools/sri-lanka-floor-area-ratio-calculator) — Find the legal max floor area, plot coverage, and number of storeys for any land plot in a UDA zone in Sri Lanka. Free, no signup, sources cited.
- [Sri Lanka Foreign Employment Minimum Wage Calculator (SLBFE)](https://induwara.lk/tools/sri-lanka-foreign-employment-minimum-wage-calculator) — Look up the SLBFE statutory minimum monthly wage for a housemaid or migrant job in Saudi Arabia, Kuwait, Qatar, UAE, Oman and more, convert it to Sri Lankan rupees at a rate you set, and compare which country pays the most.
- [Sri Lanka Furniture Import Tax Calculator (2026)](https://induwara.lk/tools/sri-lanka-furniture-import-tax-calculator) — Estimate the total import tax and landed cost of bringing furniture into Sri Lanka, sofas, beds, office chairs, tables and wardrobes under HS 94.01/94.03. Customs Duty (20%), an editable CESS, PAL, SSCL and VAT on the CIF value, with an itemised breakdown and effective rate. Free, sources cited.
- [Sri Lanka Gaming Console Import Tax Calculator](https://induwara.lk/tools/sri-lanka-gaming-console-import-tax-calculator) — Calculate the total import tax and landed cost of a PS5, Xbox, or Nintendo Switch brought into Sri Lanka, Customs Duty, PAL, VAT and SSCL on the CIF value. Free, sources cited.
- [Sri Lanka Gem & Jewellery License Fee Calculator (NGJA)](https://induwara.lk/tools/sri-lanka-gem-license-fee-calculator) — Work out the National Gem & Jewellery Authority (NGJA) fee for a gem mining, dealer, cutting/lapidary, jewellery or export licence in Sri Lanka, application, registration and licence fees itemised line by line, with validity and VAT/SSCL. Gazetted figures, sources cited.
- [Sri Lanka Generator Import Tax Calculator (2026)](https://induwara.lk/tools/sri-lanka-generator-import-tax-calculator) — Estimate the total import tax and landed cost of bringing a petrol or diesel generator into Sri Lanka, PAL, VAT and SSCL on the CIF value (HS 85.02 gensets clear at 0% duty and 0% Cess), with a line-by-line breakdown. Free, sources cited.
- [Sri Lanka Generator Running Cost Calculator](https://induwara.lk/tools/sri-lanka-generator-running-cost-calculator) — Work out what a diesel or petrol standby generator really costs to run in Sri Lanka, litres burned per hour, cost per hour/day/month, and the effective cost per kWh generated, from the kVA rating, load level and today's CPC fuel price, then compare it against the CEB grid tariff.
- [Sri Lanka Gold Price Calculator (22K, Sovereign & Gram)](https://induwara.lk/tools/sri-lanka-gold-price-calculator) — Work out what your gold is worth in Sri Lankan rupees today. Enter a weight in sovereigns (පවුම්), grams or troy ounces and a karat (24K/22K/21K/18K/14K) and get the metal value, a per-karat table and a sovereign ↔ gram ↔ troy-ounce conversion. Sources cited, no signup.
- [Sri Lanka Government Employee Leave Calculator (Establishments Code)](https://induwara.lk/tools/sri-lanka-government-employee-leave-calculator) — Work out a Sri Lankan public officer's leave position under Chapter XII of the Establishments Code — casual and vacation entitlement, the accumulation ceiling, the section 10 lapsed pool, and how many days an absence actually costs once Saturdays, Sundays and public holidays are handled the way the Code handles them. The same fortnight costs 9 days at home and 14 abroad, and the tool shows why. Each situation — illness, a sick spouse or child, maternity, adoption, study, an accident on duty, employment abroad, pre-retirement — names its section, its circular and who is empowered to approve it. Day counts are read out of the Ministry's own Leave Handbook and the English text of PA Circular 18/2022, never from the figures that circulate informally.
- [Sri Lanka Government Pension Calculator — Pensions Department formula](https://induwara.lk/tools/sri-lanka-government-pension-calculator) — Estimate your Sri Lankan public service monthly pension from pensionable salary and years of service. Uses the official (salary × months) ÷ 480 formula, with the 90% cap and W&OP/W&OOP summary. Free, sources cited.
- [Sri Lanka Government Salary & Pension Payment Dates](https://induwara.lk/tools/sri-lanka-salary-pension-payment-dates) — The General Treasury's scheduled payment dates for government servants, teachers, armed forces and pensioners, every month of 2026 and 2027, with a live countdown to your next payday and the early-payment months flagged.
- [Sri Lanka Government Salary Calculator (2025 Revision)](https://induwara.lk/tools/sri-lanka-government-salary-calculator) — Work out your revised public-sector basic salary under Public Administration Circular 10/2025, the phased 2025, 2026 and 2027 figures per salary code, with the old-to-new consolidation math. Free, no signup, sources cited.
- [Sri Lanka Government Salary Increase Calculator (2025–2027)](https://induwara.lk/tools/sri-lanka-government-salary-increase-calculator) — Work out the basic salary actually payable to you at each phase of Public Administration Circular 10/2025. Enter your 31 December 2024 basic and your Schedule II basic; the tool deducts the Rs 7,500 of absorbed allowances, then applies the 30% / 65% / 100% phasing. Matched to Schedule III. Free, no signup.
- [Sri Lanka Graphics Card (GPU) Import Tax Calculator](https://induwara.lk/tools/sri-lanka-graphics-card-import-tax-calculator) — Estimate the Sri Lanka import tax and landed cost of a graphics card or PC part, the CID, PAL, Cess, SSCL and 18% VAT cascade on the CIF value, with every line item in rupees.
- [Sri Lanka Green Tea Leaf Price Calculator](https://induwara.lk/tools/sri-lanka-green-tea-leaf-price-calculator) — Work out the fair reasonable price a factory should pay per kg of green tea leaf, using the Sri Lanka Tea Board revenue-share formula: monthly NSA × supplier share ÷ recovery ratio − transport, with optional 50:50 sharing above the district average and a shortfall check against the price you're offered.
- [Sri Lanka Gym Equipment Import Tax Calculator](https://induwara.lk/tools/sri-lanka-gym-equipment-import-tax-calculator) — Estimate the total import tax and landed cost of bringing gym equipment into Sri Lanka, CID, PAL, Cess, SSCL and VAT on the CIF value of a treadmill, exercise bike, rower, multi-gym or weights (HS 95.06). Free, sources cited.
- [Sri Lanka Headphone & Earbud Import Tax Calculator](https://induwara.lk/tools/sri-lanka-headphone-import-tax-calculator) — Estimate the total import tax and landed cost of bringing headphones, earbuds or AirPods into Sri Lanka, Customs Duty (15%), PAL, VAT and SSCL on the CIF value, with the duty-free baggage rule. Free, sources cited.
- [Sri Lanka Holiday Pay Calculator (Public, Bank & Poya Holidays)](https://induwara.lk/tools/sri-lanka-holiday-pay-calculator) — Calculate the statutory holiday pay due to a Sri Lankan worker who worked on a public, bank, poya, mercantile, or rest-day holiday, under the Shop & Office Employees Act and Wages Boards Ordinance. Free, no signup, sources cited.
- [Sri Lanka Hotel Bill Tax Calculator (SC, TDL, SSCL, VAT)](https://induwara.lk/tools/sri-lanka-hotel-bill-tax-calculator) — Break down a Sri Lankan hotel invoice into Service Charge, Tourism Development Levy, SSCL and VAT in seconds. Reverse-derive the base from any final amount. Sources cited.
- [Sri Lanka House Construction Material Calculator (CIDA / ICTAD BOQ)](https://induwara.lk/tools/sri-lanka-house-construction-material-calculator) — Estimate cement bags, sand, metal, bricks, blocks, TMT steel and roof material for a Sri Lankan house using CIDA & ICTAD residential consumption rates. Free, no signup, sources cited.
- [Sri Lanka HS Code & Import Tax Finder](https://induwara.lk/tools/sri-lanka-hs-code-import-tax-finder) — Search a product to find its Sri Lanka Customs HS heading and the full stack of import levies, Customs Import Duty (CID), PAL, Cess, VAT and SSCL. Add a CIF value for a quick landed-cost estimate. Free, sources cited.
- [Sri Lanka Import Control License Checker](https://induwara.lk/tools/sri-lanka-import-control-license-checker) — Search all 1,802 lines of the Department of Imports and Exports Control's own control list by HS code or item name: whether an ICL or ECL is required, which authority must recommend it, and which licences are currently suspended.
- [Sri Lanka Income Percentile Calculator](https://induwara.lk/tools/sri-lanka-income-percentile-calculator) — See what percentage of Sri Lankan households you out-earn. Enter your monthly income and get your national income percentile, decile, and the gap to the median and mean, built on the official DCS Household Income and Expenditure Survey 2019.
- [Sri Lanka Income Tax Calculator (APIT 2025/26)](https://induwara.lk/tools/sri-lanka-tax-calculator) — Calculate your monthly and annual personal income tax (APIT) for Sri Lanka's 2025/26 year of assessment using the official IRD brackets.
- [Sri Lanka Income Tax Refund Calculator (APIT) 2025/26](https://induwara.lk/tools/sri-lanka-income-tax-refund-calculator) — Reconcile the APIT (PAYE) your employer deducted over the year against your actual liability under the IRD 2025/26 slabs, and see your exact refund due or balance payable. Built for mid-year job changers and people with two employments. Free, no signup, sources cited.
- [Sri Lanka Induction Cooker Import Tax Calculator](https://induwara.lk/tools/sri-lanka-induction-cooker-import-tax-calculator) — Work out the full landed cost of importing an induction cooker, cooktop or portable hob into Sri Lanka, Customs Duty (15%), PAL, VAT and SSCL on the CIF value, with a line-by-line breakdown, the effective tax rate and courier vs passenger-baggage modes. Free, no signup, sources cited.
- [Sri Lanka Industrial & Commercial Electricity Bill Calculator](https://induwara.lk/tools/sri-lanka-industrial-electricity-bill-calculator) — Estimate the monthly CEB/LECO bill for a factory, workshop or commercial premises on a demand-metered tariff (GP-2, I-2, I-3), energy, maximum-demand charge in kVA, and fixed charge, with a Time-of-Use breakdown. Uses the PUCSL schedule effective 11 May 2026.
- [Sri Lanka Inflation Calculator (CCPI) — Rupee Purchasing Power](https://induwara.lk/tools/sri-lanka-inflation-calculator) — Convert any past LKR amount into today's money using the official Colombo Consumer Price Index. Year-by-year purchasing power, real-return FD check, sources cited.
- [Sri Lanka Land Registration Fee Calculator (RGD 2026)](https://induwara.lk/tools/sri-lanka-land-registration-fee-calculator) — Itemise the exact rupee cost to register a land deed at the Sri Lanka Land Registry, registration fee, folio, search, title plan, certified copies. Stamp duty separated out.
- [Sri Lanka Land Registry Finder — all 50 offices and contacts](https://induwara.lk/tools/sri-lanka-land-registry-finder) — Find which of Sri Lanka's 50 Land Registries holds the deed for a piece of land, with that office's address, registrar, telephone, mobile and email — the separate “Land” (deed) and “Title” (Bim Saviya) lines shown apart where the Registrar General's Department publishes both. Includes what to take to the counter for a search of title before you buy.
- [Sri Lanka Laptop Import Tax Calculator (2026)](https://induwara.lk/tools/sri-lanka-laptop-import-tax-calculator) — Estimate the total import tax and landed cost of bringing a laptop into Sri Lanka, PAL, VAT and SSCL on the CIF value (laptops clear at 0% duty and 0% Cess), with the duty-free baggage rule. Free, sources cited.
- [Sri Lanka Leave Encashment Calculator (Public & Private)](https://induwara.lk/tools/sri-lanka-leave-encashment-calculator) — Calculate the cash value of unused annual leave at retirement, resignation, or year-end carry-forward in Sri Lanka. Public-sector 84-day cap and Shop & Office Act formulas, sources cited.
- [Sri Lanka Liquor License Fee Calculator (FL, B, CC)](https://induwara.lk/tools/sri-lanka-liquor-license-fee-calculator) — Calculate the annual licence fee, renewal cost, and late-renewal surcharge for every Sri Lanka Excise Department liquor licence, FL/1 hotel, FL/3 tavern, FL/16 beer, FL/22 wholesale and more. Sources cited.
- [Sri Lanka Loan Early Settlement Calculator](https://induwara.lk/tools/sri-lanka-loan-early-settlement-calculator) — Find the exact capital balance to settle a housing, vehicle or personal loan early in Sri Lanka, the payoff amount, the lender's early-settlement fee, and how much interest you save. Uses the reducing-balance method every CBSL-licensed lender applies.
- [Sri Lanka Loan Eligibility Calculator](https://induwara.lk/tools/sri-lanka-loan-eligibility-calculator) — Find the maximum housing, vehicle, personal or education loan you qualify for in Sri Lanka based on your net income, existing debt, the bank's debt-service-ratio cap, interest rate and tenure. The inverse of the EMI calculator. Free, no signup, sources cited.
- [Sri Lanka Loan EMI Calculator (Housing, Vehicle, Personal)](https://induwara.lk/tools/sri-lanka-loan-emi-calculator) — Calculate monthly EMI, total interest, and a full amortisation schedule for housing, vehicle, personal, and education loans in Sri Lanka. Compares BoC, NSB, Commercial, HNB, Sampath, DFCC, NDB, and People's Bank at their current published rates.
- [Sri Lanka Loan Prepayment Calculator (Interest & Time Saved)](https://induwara.lk/tools/sri-lanka-loan-prepayment-calculator) — See how much interest and how many months you save by prepaying a housing, vehicle, or personal loan in Sri Lanka, by adding extra to each instalment or making a one-time lump-sum part-payment. Reducing-balance method per CBSL regulations.
- [Sri Lanka Lottery Winnings Tax Calculator (14% WHT)](https://induwara.lk/tools/sri-lanka-lottery-winnings-tax-calculator) — Work out your take-home from any Sri Lankan DLB or NLB lottery prize after the 14% WHT on shares above Rs 500,000. Inland Revenue Act citations, no signup.
- [Sri Lanka Marriage Registration Fee Calculator (RGD 2026)](https://induwara.lk/tools/sri-lanka-marriage-registration-fee-calculator) — Add up the exact rupee cost to legally register your marriage in Sri Lanka, General, Kandyan, or Muslim register, in-office or hotel, with special licence and copies.
- [Sri Lanka Maternity Leave Pay Calculator (2026)](https://induwara.lk/tools/sri-lanka-maternity-leave-calculator) — Work out exactly how many paid working days of maternity leave you are entitled to in Sri Lanka, your daily wage, total leave pay, and return-to-work date. Sources cited.
- [Sri Lanka Microwave Oven Import Tax Calculator](https://induwara.lk/tools/sri-lanka-microwave-oven-import-tax-calculator) — Estimate the total import tax and landed cost of bringing a microwave oven into Sri Lanka before you order from Amazon, AliExpress or eBay. Customs Duty (20%), CESS, PAL, SSCL and VAT on the CIF value, with an itemised breakdown, effective rate and an 'is it worth importing?' local-price check. Free, sources cited.
- [Sri Lanka Minimum Wage Calculator (National + Wages Boards)](https://induwara.lk/tools/sri-lanka-minimum-wage-calculator) — Check whether your pay meets Sri Lanka's legal minimum wage. Covers the national minimum and trade-specific Wages Boards (garments, plantations, hotels, building, bakery). Free, sources cited.
- [Sri Lanka Money Order Fee & Validity Calculator](https://induwara.lk/tools/sri-lanka-money-order-fee-calculator) — Work out the exact commission Sri Lanka Post charges to issue a money order, whether the counter you are standing at may legally issue that amount, and the four dates that decide how long the payee has to cash it — including the second commission on a revalidated order and the 5% charge in the exceptional second year. Paper and electronic (PMT) scales, straight from the gazetted postal tariff.
- [Sri Lanka Motor Insurance Premium Calculator (Third-Party 2026)](https://induwara.lk/tools/sri-lanka-motor-insurance-premium-calculator) — Calculate the IRCSL statutory minimum third-party motor insurance premium for any Sri Lankan vehicle, car, three-wheeler, motorcycle, lorry or bus. Stamp duty included. Free, no signup, sources cited.
- [Sri Lanka Motorcycle Import Tax Calculator (Bike Duty)](https://induwara.lk/tools/sri-lanka-motorcycle-import-tax-calculator) — Estimate the landed cost and every tax line, CID, excise, PAL, SSCL and VAT, for importing a motorcycle or scooter (HS 8711) to Sri Lanka. Petrol and electric, by engine cc or motor kW. Sources cited, no signup.
- [Sri Lanka NBRO Landslide Clearance Fee Calculator](https://induwara.lk/tools/sri-lanka-nbro-landslide-clearance-fee-calculator) — Tells you whether your building site needs National Building Research Organisation landslide clearance before the local authority can approve the plan, and prices it from NBRO's own band tables, Rs 100 for a Samurdhi house, Rs 750–7,500 for other housing by perch band, and Rs 7,500–42,000-plus for commercial and industrial land by acre band. Shows both of the conflicting figures NBRO currently publishes, side by side, instead of picking one.
- [Sri Lanka Net Salary to Gross Salary Calculator 2025/26](https://induwara.lk/tools/sri-lanka-net-to-gross-salary-calculator) — Find the gross monthly salary you need to take home a target net in Sri Lanka, reverses APIT (PAYE) and 8% EPF using the IRD's Y/A 2025/26 brackets. Free, sources cited.
- [Sri Lanka NIC Fee Calculator (Smart NIC, Lost, One-Day)](https://induwara.lk/tools/sri-lanka-nic-fee-calculator) — Find the exact rupee cost of any Sri Lankan NIC service, first NIC, lost or damaged replacement, smart NIC upgrade, name or address change, with documents to carry and where to apply.
- [Sri Lanka No-Pay Leave Salary Deduction Calculator](https://induwara.lk/tools/sri-lanka-no-pay-leave-calculator) — Calculate the exact salary cut for no-pay (unpaid) leave days in Sri Lanka under the 30-day, working-days, and actual-days methods, with the EPF/ETF impact for the month. Free, no signup, sources cited.
- [Sri Lanka NRFC / RFC Deposit Calculator (Foreign Currency FD)](https://induwara.lk/tools/sri-lanka-nrfc-deposit-calculator) — Calculate maturity, interest, and LKR-equivalent value of a Sri Lankan NRFC, RFC, or BFCA foreign currency fixed deposit. Free, no signup, CBSL and IRD sources cited.
- [Sri Lanka NWSDB Water Connection Fee Calculator](https://induwara.lk/tools/sri-lanka-water-connection-fee-calculator) — Estimate the one-time NWSDB new water connection cost in Sri Lanka, service deposit, connection fee, meter cost, pipe and road-crossing surcharge, itemised by category and meter size.
- [Sri Lanka Online Bank Transfer Limit Checker](https://induwara.lk/tools/sri-lanka-online-transfer-limit-checker) — Check which interbank rail, CEFTS, SLIPS, RTGS or JustPay, can carry a given rupee amount in Sri Lanka, whether it fits the per-transaction cap, how fast it settles, and the CBSL fee ceiling. Free, sources cited.
- [Sri Lanka Overtime Pay Calculator (S&O Act 2026)](https://induwara.lk/tools/sri-lanka-overtime-pay-calculator) — Calculate the legally-correct overtime pay you are owed in Sri Lanka under the Shop & Office Employees Act. Hourly rate, weekday + rest-day + holiday OT, total monthly gross, sources cited.
- [Sri Lanka Paddy Price & Harvest Income Calculator](https://induwara.lk/tools/sri-lanka-paddy-income-calculator) — See the current certified (guaranteed) paddy price for Nadu, Samba and Keeri Samba, then enter your acres and expected yield to get the harvest in kg and bushels and the gross income the Paddy Marketing Board must pay. Optional net-profit and open-market comparison.
- [Sri Lanka Partnership Income Tax Calculator](https://induwara.lk/tools/sri-lanka-partnership-tax-calculator) — Work out a Sri Lankan partnership's income tax, a flat 6% on divisible profit plus other income above Rs 1,000,000, a separate 10% on investment-asset gains, and each partner's share by profit-sharing ratio. Free, no signup, IRD-cited.
- [Sri Lanka Passport Fee Calculator (Normal, One-Day, Same-Day)](https://induwara.lk/tools/sri-lanka-passport-fee-calculator) — Add up the exact rupee cost for a Sri Lankan passport, Normal or One-Day service, adult or child, replacement or alteration, line-by-line, sources cited.
- [Sri Lanka Patent Registration & Maintenance Fee Calculator](https://induwara.lk/tools/sri-lanka-patent-registration-fee-calculator) — Work out the full NIPO government fee to patent an invention in Sri Lanka, filing, examination, grant and the escalating 20-year annual maintenance fees. Sources cited, no signup.
- [Sri Lanka Pawning Calculator (Gold Loan Advance & Interest)](https://induwara.lk/tools/sri-lanka-pawning-calculator) — Calculate the maximum pawning advance, total interest, and repayment due at BoC, People's Bank, NSB, HNB, Commercial, and Sampath, by weight, carat, LTV, and tenure. Sources cited.
- [Sri Lanka Payment Gateway Fee Calculator (PayHere, WebXPay, Onepay)](https://induwara.lk/tools/sri-lanka-payment-gateway-fee-calculator) — Work out exactly what you keep after PayHere, WebXPay and Onepay fees. Enter a sale amount, card type and monthly volume to see the fee, net payout and effective rate side by side, and which PayHere plan (Lite / Plus / Premium) is cheapest once the subscription is factored in.
- [Sri Lanka Payslip Generator (EPF, ETF & APIT)](https://induwara.lk/tools/sri-lanka-payslip-generator) — Generate a print-ready Sri Lankan monthly salary slip with statutory EPF (8%/12%), ETF (3%) and APIT/PAYE deductions, take-home pay, and true employer cost.
- [Sri Lanka PC Build Import Tax Calculator (2026)](https://induwara.lk/tools/sri-lanka-pc-build-import-tax-calculator) — Add up the total Sri Lankan import tax (Customs Duty, Cess, PAL, VAT and SSCL) on a complete desktop PC build entered component-by-component, returning the full landed cost in rupees. PC parts clear at 0% duty and Cess but still pay a flat ~32.55% in levies.
- [Sri Lanka Pension Commutation Calculator (25% Lump Sum)](https://induwara.lk/tools/sri-lanka-pension-commutation-calculator) — Calculate your commuted lump sum, reduced monthly pension and full-pension restoration date under the Sri Lanka public service pension scheme. Free, no signup, sources cited.
- [Sri Lanka Permit & Grant Land Checker (LDO permit, Swarnabhoomi, Jayabhoomi)](https://induwara.lk/tools/sri-lanka-permit-land-checker) — Tells the holder of Sri Lankan state land — an annual permit under the Land Development Ordinance, or a Swarnabhoomi, Jayabhoomi, Rathnabhoomi or Ranbima grant — whether selling, gifting a divided portion, mortgaging, leasing out or nominating a successor is lawful, prohibited outright, or lawful only with prior written approval, and quotes the section that decides it. Works out who inherits under the Third Schedule as substituted by Act No. 11 of 2022, including the rule most pages on the web still get wrong.
- [Sri Lanka Police Clearance (PCC) Fee Calculator](https://induwara.lk/tools/sri-lanka-police-clearance-fee-calculator) — Calculate the total LKR cost of a Sri Lanka Police Clearance Certificate, Police HQ fee, MFA Apostille or legalisation, certified translation, courier and express, itemised, sources cited.
- [Sri Lanka Ports and Airports Development Levy (PAL) Calculator](https://induwara.lk/tools/sri-lanka-ports-airports-development-levy-calculator) — Calculate the Ports and Airports Development Levy (PAL) payable on imported goods from CIF value, pick the standard 7.5%, concessionary 2.5% or exempt rate, build CIF from FOB, and convert a foreign-currency invoice to rupees. Free, sources cited.
- [Sri Lanka Poverty Line Calculator — by District (2026)](https://induwara.lk/tools/sri-lanka-poverty-line-calculator) — Check a Sri Lankan household against the government's Official Poverty Line by district, enter district, household size, and monthly income to see the basic-needs threshold and your monthly surplus or shortfall.
- [Sri Lanka Power Bank Import Tax Calculator (2026)](https://induwara.lk/tools/sri-lanka-power-bank-import-tax-calculator) — Estimate the total import tax and landed cost of bringing a lithium-ion power bank into Sri Lanka, Customs Duty (15%), PAL, VAT and SSCL on the CIF value, plus a watt-hour flight-allowance check for travellers. Free, sources cited.
- [Sri Lanka Printer Import Tax Calculator](https://induwara.lk/tools/sri-lanka-printer-import-tax-calculator) — Calculate Customs Duty, PAL, VAT and SSCL on a printer imported into Sri Lanka (HS 8443), taxed as an IT good, 0% duty, not a general appliance. Every levy in rupees, with the landed cost and effective rate.
- [Sri Lanka Projector Import Tax Calculator](https://induwara.lk/tools/sri-lanka-projector-import-tax-calculator) — Calculate Customs Duty, PAL, VAT and SSCL on a data/office/home projector imported into Sri Lanka (HS 8528.62), taxed as an IT good, 0% duty, 0% Cess. Every levy in rupees, with the landed cost and effective rate.
- [Sri Lanka Property Rates Calculator (MC / UC / PS Assessment Tax)](https://induwara.lk/tools/sri-lanka-property-rates-calculator) — Calculate quarterly and annual property rates payable to any Sri Lankan local authority. Includes the 31-January discount, early-quarter discount, and warrant surcharge. Free, no signup, ordinances cited.
- [Sri Lanka Public Servant Property Loan Calculator](https://induwara.lk/tools/sri-lanka-public-servant-property-loan-calculator) — Estimate your maximum government property loan, monthly instalment, and full amortisation under Public Administration Circular 03/2025. Free, no signup, sources cited.
- [Sri Lanka Public Service Salary Scale Finder](https://induwara.lk/tools/sri-lanka-public-service-salary-scale-finder) — Look up the official Sri Lankan public-service salary scale for any salary code (MN-1, MA-3, MM-1, SL-2 and more). See the initial salary, the annual increment, the number of steps, the years to reach the maximum, and your basic salary at any step or year of service. Built from Public Administration Circular 03/2016 Schedule I. Free, no signup, sources cited.
- [Sri Lanka Quarterly Tax Installment Calculator 2025/26](https://induwara.lk/tools/sri-lanka-quarterly-tax-installment-calculator) — Calculate the four quarterly self-assessment income tax installments owed to the Sri Lanka IRD for Y/A 2025/26, with statutory due dates and late-payment interest estimate. Free, sources cited.
- [Sri Lanka Recurring Deposit (RD) Calculator 2026](https://induwara.lk/tools/sri-lanka-recurring-deposit-calculator) — Project the maturity value, interest, and post-WHT net payout of a Sri Lankan bank Recurring Deposit. Standard annuity formula, 5% WHT, senior-citizen exemption. Free, no signup.
- [Sri Lanka Refrigerator Import Tax Calculator (2026)](https://induwara.lk/tools/sri-lanka-refrigerator-import-tax-calculator) — Estimate the total import tax and landed cost of bringing a refrigerator or freezer into Sri Lanka, single-door, double-door, side-by-side, french-door or household freezer. Customs Duty (20%), CESS, PAL, SSCL and VAT on the CIF value, with an itemised breakdown and effective rate. Free, sources cited.
- [Sri Lanka Remittance Rate Calculator, Best Rate to Send Money Home Today](https://induwara.lk/tools/sri-lanka-remittance-rate-calculator) — Compare what actually lands in Sri Lanka across Wise, Remitly, Western Union, MoneyGram, Gulf exchange houses, bank partner channels and SWIFT wires. Uses the live mid-market rate and counts both the transfer fee and the hidden exchange-rate margin, the way the World Bank measures remittance cost. 17 sending countries, every figure overridable with the quote you were actually given.
- [Sri Lanka Rental Income Tax Calculator 2025/26](https://induwara.lk/tools/sri-lanka-rental-income-tax-calculator) — Work out the personal income tax on rental income in Sri Lanka, applies the IRD 25% deemed repair allowance and Y/A 2025/26 PIT slabs. Free, no signup, sources cited.
- [Sri Lanka Retirement Age & EPF/Pension Eligibility Calculator](https://induwara.lk/tools/sri-lanka-retirement-age-calculator) — Find the exact dates you become eligible to retire (age 60), withdraw your full EPF (55 for men / 50 for women), claim ETF, and qualify for gratuity in Sri Lanka, plus the precise years, months and days remaining to each. Statutes cited, no signup.
- [Sri Lanka RTI Fee & Deadline Calculator, Every Date and Every Rupee](https://induwara.lk/tools/sri-lanka-rti-fee-deadline-calculator) — Enter the date your Right to Information request reached the public authority and get every statutory deadline as a real calendar date, the 14 working days to decide, the 14 days to supply, the 21-day extension, both appeal windows and the Commission's 30 days, plus the exact rupee fee the authority may lawfully charge under the gazetted RTI Rules, after the four free A4 pages. Working days skip gazetted public holidays. Sources cited.
- [Sri Lanka Salary Increment (Pay Rise) Calculator](https://induwara.lk/tools/sri-lanka-salary-increment-calculator) — See how much of your pay rise you actually keep after APIT tax and 8% EPF in Sri Lanka. Before/after take-home comparison, extra tax, marginal rate, and the percentage of the raise you keep. Free, no signup, sources cited.
- [Sri Lanka Salary vs Inflation Calculator (Real Raise)](https://induwara.lk/tools/sri-lanka-salary-vs-inflation-calculator) — Check whether your pay rise beat inflation in Sri Lanka. Compare two salaries with the official CCPI to see your real raise, real pay cut, break-even salary, and lost purchasing power.
- [Sri Lanka Savings Account Interest Calculator](https://induwara.lk/tools/sri-lanka-savings-account-interest-calculator) — Calculate the real monthly and annual interest a Sri Lankan savings account earns using the daily-balance method every bank uses, then see the 10% AIT the bank withholds and the net interest actually credited. Handles lump sums, monthly top-ups, and reinvested or paid-out interest.
- [Sri Lanka Second Job (Secondary Employment) Tax Calculator](https://induwara.lk/tools/sri-lanka-secondary-employment-tax-calculator) — Work out the exact APIT your second employer withholds on a side salary, retainer, or visiting-lecturer payment in Sri Lanka. Uses the IRD's Table 07 secondary-employment rates for Y/A 2025/26, no personal relief, rate set by your primary income. Free, no signup.
- [Sri Lanka Self-Employed Pension Calculator (Surekuma / SSB)](https://induwara.lk/tools/sri-lanka-self-employed-pension-calculator) — Price the Social Security Board's Surekuma pension for anyone self-employed: the premium for the monthly pension you want from 60, across all eight SSB payment plans at your entry age, pay-until-60, the 2/3/4/5/10/15-year terms and a single payment, plus the pension a premium you can afford would buy, and the Arassawa child pre-plan. Read straight off the Board's own published tables.
- [Sri Lanka Senior Citizen FD Calculator (15% Special Scheme)](https://induwara.lk/tools/sri-lanka-senior-citizen-fd-calculator) — Calculate the 15% Senior Citizens' Special Deposit Scheme payout for any deposit, bank, and tenor, with WHT, monthly cash flow, and a market-FD comparison. Free, no signup, sources cited.
- [Sri Lanka Sewing Machine Import Tax Calculator](https://induwara.lk/tools/sri-lanka-sewing-machine-import-tax-calculator) — Estimate the total Sri Lanka import tax (Customs Duty, Cess, PAL, VAT, SSCL) and landed cost of a domestic or industrial sewing machine from its CIF value, with the HS 84.52 duty bands built in.
- [Sri Lanka Shoe Import Tax Calculator (2026)](https://induwara.lk/tools/sri-lanka-shoe-import-tax-calculator) — Estimate the total import tax and landed cost of bringing shoes or sneakers into Sri Lanka, Customs Duty, Cess, PAL, VAT and SSCL on the CIF value (HS Chapter 64), with the duty-free baggage rule. Free, sources cited.
- [Sri Lanka Smartwatch Import Tax Calculator (2026)](https://induwara.lk/tools/sri-lanka-smartwatch-import-tax-calculator) — Estimate the total import tax and landed cost of bringing a smartwatch or fitness band into Sri Lanka, Apple Watch, Galaxy Watch, Garmin or Fitbit. Customs Duty (15%), PAL, VAT and SSCL on the CIF value, with the duty-free baggage rule. Free, sources cited.
- [Sri Lanka Solar Net Metering, Net Accounting & Net Plus Calculator (2026)](https://induwara.lk/tools/sri-lanka-solar-net-metering-calculator) — Estimate solar payback for rooftop PV in Sri Lanka under all three CEB/PUCSL schemes. Side-by-side Net Metering vs Net Accounting vs Net Plus, 20-year cash flow, free, sources cited.
- [Sri Lanka Solar Panel Payback Calculator (2026)](https://induwara.lk/tools/sri-lanka-solar-panel-payback-calculator) — Work out how many years your rooftop solar takes to pay back in Sri Lanka and its 20-year net saving. Compares Net Metering, Net Accounting and Net Plus using PUCSL/CEB rates. Free, no signup, sources cited.
- [Sri Lanka Sole Proprietor vs Private Limited Company Tax Calculator](https://induwara.lk/tools/sri-lanka-sole-proprietor-vs-company-tax-calculator) — Compare the total Sri Lankan tax you pay as a sole proprietor (personal income-tax slabs) versus a private limited company (corporate tax + 15% dividend WHT + compliance cost). See which keeps more money and the profit level where incorporating starts to pay off. IRD rates, sources cited.
- [Sri Lanka Special Commodity Levy (SCL) Calculator](https://induwara.lk/tools/sri-lanka-special-commodity-levy-calculator) — Calculate the Special Commodity Levy on imported essentials, sugar, dhal, canned fish, big onions, potatoes and cooking oils, from the current gazette rates. Enter commodity and quantity for the total levy and per-kg cost. SCL is charged in lieu of Customs Duty, VAT, PAL and CESS.
- [Sri Lanka SSCL Calculator (Social Security Contribution Levy 2.5%)](https://induwara.lk/tools/sri-lanka-sscl-calculator) — Calculate SSCL at 2.5% on your quarterly or annual turnover. Applies Schedule II deemed-liable percentages by activity class and checks the Rs 15M / Rs 60M registration threshold. Sources cited.
- [Sri Lanka Stamp Duty Calculator (Deeds, Leases, Mortgages 2026)](https://induwara.lk/tools/sri-lanka-stamp-duty-calculator) — Calculate the stamp duty payable on deeds of transfer, lease agreements, mortgage bonds, promissory notes, hire-purchase agreements, affidavits, powers of attorney, and receipts in Sri Lanka. Uses the rates in the Stamp Duty (Special Provisions) Act and Gazette 1465/19, with the 4% Provincial Council rate on property transfers.
- [Sri Lanka Suraksha Student Insurance Benefit Calculator](https://induwara.lk/tools/sri-lanka-suraksha-student-insurance-calculator) — Work out the exact rupee amount a Sri Lankan school child can claim under the free Suraksha (Sisu Suraksha) student insurance scheme, hospital stays, surgery, accidents, disability, or a parent's death, using the official SLIC and MOE benefit schedule, plus the documents and deadline to file.
- [Sri Lanka Tablet & iPad Import Tax Calculator](https://induwara.lk/tools/sri-lanka-tablet-import-tax-calculator) — Estimate the total import tax and landed cost of bringing a tablet or iPad into Sri Lanka, PAL, VAT and SSCL on the CIF value (data tablets clear at 0% duty and 0% Cess), with the duty-free baggage rule and a reverse mode. Free, sources cited.
- [Sri Lanka Take-Home Salary Calculator (Gross to Net)](https://induwara.lk/tools/sri-lanka-take-home-salary-calculator) — Enter your gross monthly salary and see your net take-home pay in Sri Lanka after the 8% EPF employee deduction and APIT (PAYE) income tax, using the IRD Y/A 2025/26 brackets. Also shows your employer's total cost (EPF 12% + ETF 3%), annual figures, and effective deduction rate. Free, no signup, runs in your browser.
- [Sri Lanka Tax Deadline Calendar — IRD Due Dates 2026](https://induwara.lk/tools/sri-lanka-tax-deadline-calendar) — Pick the taxes you pay, income tax, VAT, SSCL, APIT/PAYE or WHT, and instantly see every upcoming IRD filing and payment deadline with a live days-remaining countdown. Dates taken verbatim from the official IRD Tax Calendar 2026.
- [Sri Lanka Tax Penalty & Interest Calculator (IRD)](https://induwara.lk/tools/sri-lanka-tax-penalty-calculator) — Estimate IRD late-payment interest, default penalty, and late-filing penalty for income tax, VAT, WHT, APIT and SSCL in Sri Lanka. Cites IRA s.159, s.178, s.179. Free, no signup.
- [Sri Lanka Tax Residency Calculator (183-Day Rule, IRA s.69)](https://induwara.lk/tools/sri-lanka-tax-residency-calculator) — Find out if you are tax resident in Sri Lanka for any year of assessment under section 69 of the Inland Revenue Act. Counts trips, the 183-day rule, and the rolling 12-month window. Free, no signup, sources cited.
- [Sri Lanka Terminal Benefits Tax Calculator (Gratuity & VRS)](https://induwara.lk/tools/sri-lanka-terminal-benefits-tax-calculator) — Calculate the APIT withheld from a Sri Lankan retirement or resignation lump sum, retiring gratuity, non-Government commuted pension, ETF and VRS compensation, under IRD APIT Table 03 (Y/A 2025/26). Shows the tax-free slab, the 12% and 36% components, exempt EPF, and the net you take home.
- [Sri Lanka Termination Compensation Calculator (TEWA)](https://induwara.lk/tools/sri-lanka-termination-compensation-calculator) — Calculate the statutory compensation owed on a non-disciplinary termination in Sri Lanka using the Commissioner of Labour's TEWA formula, months of salary per year of service, a band-by-band breakdown, and the final amount after the 48-month and Rs 2.5 million caps.
- [Sri Lanka TEWA Compensation Calculator (Termination Pay)](https://induwara.lk/tools/sri-lanka-tewa-compensation-calculator) — Calculate the statutory termination compensation owed to a Sri Lankan workman under the TEWA Act No. 45 of 1971, gazetted band schedule, month and ceiling limits, eligibility checks, sources cited.
- [Sri Lanka Time-of-Use (TOU) Electricity Tariff Calculator](https://induwara.lk/tools/sri-lanka-tou-tariff-calculator) — Check if a CEB or LECO Time-of-Use electricity meter saves you money. Split your usage into off-peak, day and peak units and compare the D-TOU bill against the standard block tariff. Free, sources cited.
- [Sri Lanka TIN Registration Checker](https://induwara.lk/tools/sri-lanka-tin-registration-checker) — Check in seconds whether you must register for a TIN, register for income tax, and file a return in Sri Lanka. Enter your age, residency and income, get a clear verdict, the deadline, the penalty, and how to register at the IRD. Free, no signup, sources cited.
- [Sri Lanka Tourism (SLTDA) Registration Fee Calculator](https://induwara.lk/tools/sri-lanka-tourism-registration-fee-calculator) — Calculate the exact SLTDA registration and renewal fee, Registration, License and Admin fees plus SSCL and VAT, for any Sri Lankan tourism establishment category and room band.
- [Sri Lanka Trade License Fee Calculator](https://induwara.lk/tools/sri-lanka-trade-license-fee-calculator) — Estimate the annual local-authority trade/business license fee for a Sri Lankan shop from the premises' annual value (AV) using the standard Pradeshiya Sabha / Urban Council / Municipal Council by-law fee schedule, and see whether a prescribed-trade fee may apply on top.
- [Sri Lanka Trademark Registration Fee Calculator (NIPO)](https://induwara.lk/tools/sri-lanka-trademark-registration-fee-calculator) — Estimate the total NIPO government fee to register a trademark in Sri Lanka, by Nice class, local vs foreign tier, with renewal cost. Sources cited, no signup.
- [Sri Lanka Treasury Bill (T-Bill) Yield Calculator](https://induwara.lk/tools/sri-lanka-treasury-bill-calculator) — Calculate the yield, interest, and after-tax return on a Sri Lankan 91 / 182 / 364-day Treasury Bill using CBSL discount-pricing conventions. Free, no signup, sources cited.
- [Sri Lanka Treasury Bond Calculator (YTM & Cashflows)](https://induwara.lk/tools/sri-lanka-treasury-bond-calculator) — Compute Yield to Maturity, accrued interest, dirty price and the full semi-annual cashflow schedule for any Sri Lankan Government Treasury Bond. CBSL conventions, free, no signup, sources cited.
- [Sri Lanka TV Import Tax Calculator](https://induwara.lk/tools/sri-lanka-tv-import-tax-calculator) — Calculate the total import tax and landed cost of bringing a television into Sri Lanka, Customs Duty, Cess, PAL, SSCL and VAT on the CIF value, with no baggage exemption. Free, sources cited.
- [Sri Lanka Tyre Import Tax Calculator](https://induwara.lk/tools/sri-lanka-tyre-import-tax-calculator) — Calculate the total import tax and landed cost of bringing car, SUV, motorcycle or three-wheeler tyres into Sri Lanka, Customs Duty, Cess, PAL, SSCL and VAT on the CIF value, with a per-tyre figure. Free, sources cited.
- [Sri Lanka Unit Trust & Money Market Fund Calculator](https://induwara.lk/tools/sri-lanka-unit-trust-calculator) — Project the maturity value of a Sri Lankan money market fund or unit trust, lump sum, monthly top-ups, or both, after the management fee, then compare it side by side with a fixed deposit net of the 10% Advance Income Tax on interest. Free, no signup, SEC/UTASL/IRD sources cited.
- [Sri Lanka Vacuum Cleaner Import Tax Calculator](https://induwara.lk/tools/sri-lanka-vacuum-cleaner-import-tax-calculator) — Estimate the total Sri Lanka Customs import tax (CID, CESS, PAL, SSCL and VAT) and final landed cost of an imported robot, upright, canister or stick vacuum cleaner from its CIF or FOB value, so you know the real cost before you order.
- [Sri Lanka VAT Calculator (18% — Add or Remove)](https://induwara.lk/tools/sri-lanka-vat-calculator) — Add or remove 18% Value Added Tax from any LKR amount, with a clear base / VAT / total breakdown and a copy-ready invoice line. Defaults to Sri Lanka's current standard rate and supports the older 8%, 12%, and 15% rates for reconciling historical invoices.
- [Sri Lanka VAT Registration Threshold Calculator (2026)](https://induwara.lk/tools/sri-lanka-vat-registration-threshold-calculator) — Find out instantly whether your Sri Lankan business must register for VAT. Tests both the quarterly and annual statutory limits.
- [Sri Lanka VAT Tax Invoice Generator (2026 Format)](https://induwara.lk/tools/sri-lanka-vat-invoice-generator) — Generate a print-ready Sri Lankan VAT tax invoice that complies with the IRD's new mandatory 2026 format (Gazette 2481/22), correct serial-number format, TINs, and separate net/VAT/total lines, all in your browser.
- [Sri Lanka Vehicle Down Payment & Loan-to-Value (LTV) Calculator](https://induwara.lk/tools/sri-lanka-vehicle-down-payment-calculator) — Work out the minimum down payment and the maximum a bank may legally lend for any vehicle in Sri Lanka, from the Central Bank's loan-to-value (LTV) caps, cars, commercial vehicles, motorcycles and three-wheelers. Free, no signup, sources cited.
- [Sri Lanka Vehicle Import Eligibility Checker (2026)](https://induwara.lk/tools/sri-lanka-vehicle-import-eligibility-checker) — Check if the car, van, cab, lorry, bus or motorcycle you want to import into Sri Lanka is actually allowed, the per-category age cap (computed the Customs way, manufacture to Bill of Lading), whether an Import Control License is needed, and the one-vehicle-per-12-months individual quota. Free, no signup, gazette sources cited.
- [Sri Lanka Vehicle Leasing Calculator (Finance Lease, CBSL)](https://induwara.lk/tools/sri-lanka-vehicle-leasing-calculator) — Calculate the monthly rental, total interest, and full amortisation on a Sri Lankan vehicle finance lease. Inputs advance, term, residual, and fees, with the CBSL maximum-rate ceiling check.
- [Sri Lanka Vehicle Revenue License Calculator (2026)](https://induwara.lk/tools/sri-lanka-vehicle-revenue-license-calculator) — Calculate the exact annual revenue licence fee for any Sri Lankan vehicle, car, three-wheeler, motorcycle, van, lorry or bus. Includes the 10%-per-quarter late surcharge and the mandatory emission test fee. Western Province schedule.
- [Sri Lanka Vehicle Transfer Fee Calculator](https://induwara.lk/tools/sri-lanka-vehicle-transfer-fee-calculator) — Calculate the exact Department of Motor Traffic (RMV) cost to transfer a vehicle in Sri Lanka, transfer fee by vehicle class, ordinary vs one-day service, the Rs 4,000 under-7-year tax, mortgage/absolute-ownership cancellation and postage. Free, no signup, sources cited.
- [Sri Lanka Washing Machine Import Tax Calculator](https://induwara.lk/tools/sri-lanka-washing-machine-import-tax-calculator) — Estimate the total import tax and landed cost of bringing a washing machine into Sri Lanka, front-load, top-load, semi-automatic or washer-dryer combo. Customs Duty (20%), CESS, PAL, SSCL and VAT on the CIF value, with an itemised breakdown and effective rate. Free, sources cited.
- [Sri Lanka Water Bill Calculator (NWSDB)](https://induwara.lk/tools/sri-lanka-water-bill-calculator) — Calculate your monthly NWSDB water bill from your meter reading using the gazetted block-tariff schedule, with service and sewerage charges itemised.
- [Sri Lanka Water Heater Import Tax Calculator](https://induwara.lk/tools/sri-lanka-water-heater-import-tax-calculator) — Estimate the total import tax and landed cost of bringing an electric water heater or geyser into Sri Lanka before you order from Amazon, AliExpress or eBay. Customs Duty (20%), CESS, PAL, SSCL and VAT on the CIF value, with an itemised breakdown, effective rate and an 'is it worth importing?' local-price check. Free, sources cited.
- [Sri Lanka Water Purifier Import Tax Calculator](https://induwara.lk/tools/sri-lanka-water-purifier-import-tax-calculator) — Estimate the total import tax and landed cost of bringing a water purifier or reverse-osmosis (RO) filtration system into Sri Lanka before you order from Amazon, AliExpress or a Colombo importer. Customs Duty (15%), CESS, PAL, SSCL and VAT on the CIF value of HS 8421.21 filtration apparatus, with an itemised breakdown, effective rate and an 'is it worth importing?' local-price check. Free, sources cited.
- [Sri Lanka Widows' & Orphans' Pension (W&OP) Calculator](https://induwara.lk/tools/sri-lanka-widows-orphans-pension-calculator) — Estimate the monthly survivor pension a widow or dependent child of a deceased Sri Lankan public officer is entitled to under W&OP-I, W&OP-II, and PSPS-W&OP. Free, no signup, sources cited.
- [Sri Lanka Withholding Tax (WHT/AIT) Calculator](https://induwara.lk/tools/sri-lanka-withholding-tax-calculator) — Calculate the withholding tax / Advance Income Tax (AIT) deducted at source on Sri Lankan interest, dividends, rent, service fees, and royalties under the IRD rates from 1 April 2025, with the rate, net received, and final-vs-creditable treatment.
- [Sri Lanka Workmen's Compensation Calculator (Cap. 139)](https://induwara.lk/tools/sri-lanka-workmens-compensation-calculator) — Calculate statutory workmen's compensation under the Sri Lanka Workmen's Compensation Ordinance, death, permanent total, permanent partial (Schedule II), and temporary disablement, with statutory ceilings applied automatically.
- [Sri Lanka YouTube & AdSense Tax Calculator](https://induwara.lk/tools/sri-lanka-youtube-tax-calculator) — See how much US tax Google withholds from your YouTube/AdSense earnings as a Sri Lankan creator, in USD and LKR, and how much you lose by not submitting a W-8BEN. Sri Lanka has no US tax treaty, so the 30% royalty rate applies to your US-audience share.
- [Sri Lanka Zakat al-Fitr (Fitrah) Calculator](https://induwara.lk/tools/sri-lanka-zakat-al-fitr-calculator) — Work out your household's Zakat al-Fitr (Fitrah) for Sri Lanka, the total rice weight and the cash amount per person, using the ACJU standard of 2.5 kg of rice per head. Pay in rice or cash before the Eid al-Fitr prayer. Free, no signup, sources cited.
- [Star Trek Le Creuset Price in Sri Lanka (Import Cost Calculator)](https://induwara.lk/tools/star-trek-le-creuset-sri-lanka-price-calculator) — Every piece in the Le Creuset x Star Trek 60th-anniversary collection priced in rupees, with the full Sri Lankan landed cost, Customs Duty, Cess, PAL, VAT and SSCL, worked out line by line. Compares posting it in against carrying it home under the Customs passenger baggage concession, and handles resale prices. Free, no signup, every rate cited.
- [Tip Calculator — Bill Splitter with Country Presets](https://induwara.lk/tools/tip-calculator) — Calculate the tip, add tax, and split the bill across any number of people. Customary tip presets for 14 countries including Sri Lanka, US, UK, and Japan, instant, no signup, sources cited.
- [UK National Insurance Number Application & Wait-Time Checker](https://induwara.lk/tools/uk-national-insurance-number-application-checker) — Check whether you can apply for a UK National Insurance number against GOV.UK's three published conditions, see which identity route your documents put you on, and track exactly where you sit inside the stated 4-week wait, with the working-day count and the helpline to call once it passes.
- [US ITIN Application Processing Time Estimator](https://induwara.lk/tools/us-itin-processing-time-estimator) — Work out when the IRS should have answered your Form W-7. Enter the date your ITIN application was received and the estimator applies the IRS's own published timeframes, 7 weeks normally, 9 to 11 in filing season or from overseas, plus the separate 60-day clock on getting your passport back, and the point at which chasing it is worth the phone call.
- [US W-4 Dual-Income Withholding Calculator](https://induwara.lk/tools/us-w4-dual-income-withholding-calculator) — Work out Step 2 of your Form W-4 when you and your spouse both work. Runs the IRS Multiple Jobs Worksheet against the official 2026 lookup tables, tells you whether to tick the Step 2(c) box instead, and projects the April refund or bill under each choice using the Publication 15-T rate schedules.
- [Zakat Calculator (Sri Lanka, LKR)](https://induwara.lk/tools/zakat-calculator) — Work out your Zakat in Sri Lankan rupees on cash, gold, silver, business stock and receivables at the fixed 2.5% rate, after checking your wealth against the silver or gold nisab. Runs entirely in your browser, assumptions stated and cited.

### Utility (150)

- [.htpasswd Generator (Apache / Nginx Basic Auth)](https://induwara.lk/tools/htpasswd-generator) — Generate Apache/Nginx .htpasswd credential lines (bcrypt, APR1-MD5, SHA-1) entirely in your browser, with a matching .htaccess snippet and a password verify mode.
- [Age Calculator Sri Lanka — Exact Years, Months, Days](https://induwara.lk/tools/age-calculator) — Calculate your exact age in years, months, days, hours, and minutes. Includes Sri Lanka milestones: NIC eligibility at 16, voting age at 18, Grade 1 cut-off, driving licence age, and passport validity. Runs entirely in your browser, no signup.
- [AI Chatbot Age Requirement Checker](https://induwara.lk/tools/ai-chatbot-age-requirement-checker) — Enter an age and country to see which AI chatbots, ChatGPT, Claude, Gemini, Copilot, Perplexity, Grok, Meta AI, Character.AI and DeepSeek, a person can use, whether parental consent is required, and the exact minimum age each provider sets in its own Terms of Service, with a source link per provider.
- [AI Chatbots in Sri Lanka: Availability & Access Checker](https://induwara.lk/tools/ai-chatbots-in-sri-lanka) — Check whether ChatGPT, Claude, Gemini, Copilot, Perplexity, Meta AI, DeepSeek and Grok are available in Sri Lanka, free tier, paying with a Sri Lankan card, Sinhala/Tamil support, and the official signup link. Every status is sourced from the provider's own availability page.
- [AI Content Moderation Checker (Toxicity + Profanity)](https://induwara.lk/tools/ai-content-moderation-checker) — Paste any comment, review, or message and check it for toxicity, profanity, threats, insults, and hate speech across the six Jigsaw categories. Offending words highlighted, sources cited, no signup, nothing stored.
- [ASCII Table & Text Converter — Dec, Hex, Oct, Binary](https://induwara.lk/tools/ascii-table) — A complete, searchable ASCII chart (0–127) with decimal, hex, octal, binary, glyph, HTML entity and RFC 20 control names, plus a two-way converter between text and ASCII codes. Runs entirely in your browser, no signup.
- [Aspect Ratio Calculator — resize keeping ratio, 16:9 & more](https://induwara.lk/tools/aspect-ratio-calculator) — Solve any missing width or height while holding an aspect ratio fixed, and reduce any resolution to its simplest ratio (1920×1080 → 16:9). Names the standard ratio, shows the decimal and orientation, and lists matching resolution presets. Runs entirely in your browser.
- [Barcode Generator — Code 128, EAN-13, UPC-A, ITF, Code 39, Codabar](https://induwara.lk/tools/barcode-generator) — Generate scannable 1-D barcodes in Code 128, EAN-13, UPC-A, ITF, Code 39, and Codabar formats. GS1 check digits calculated and verified for you. Download as PNG or SVG, encoded entirely in your browser.
- [Base64 Encoder & Decoder — RFC 4648, URL-safe, file support](https://induwara.lk/tools/base64-encoder-decoder) — Encode text or files to Base64 and decode Base64 back to text or a download. Standard and URL-safe alphabets, with or without '=' padding, UTF-8 round-trip verified. Runs entirely in your browser.
- [Binary Translator (Text to Binary & Binary to Text)](https://induwara.lk/tools/binary-translator) — Convert text to binary (8-bit per byte) and decode binary back to readable text in your browser. Supports UTF-8 and 8-bit ASCII, an adjustable byte separator, and live character, byte and bit counters. Free, no signup, sources cited.
- [BMI Calculator — Free, WHO + Asian-Adjusted, No Signup](https://induwara.lk/tools/bmi-calculator) — Calculate your Body Mass Index in metric (kg/cm) or imperial (lb/ft) units. Switch between the WHO global scale and the Asian-adjusted thresholds, see your healthy weight range and how far you are from it, runs in your browser, no signup.
- [Body Fat Percentage Calculator — US Navy Method](https://induwara.lk/tools/body-fat-percentage-calculator) — Estimate your body-fat percentage from neck, waist, and hip tape measurements using the original US Navy (Hodgdon & Beckett 1984) method. Metric and imperial, men and women, with lean body mass and ACE fitness bands, runs entirely in your browser, no signup.
- [Box Shadow Generator — Visual CSS Drop Shadow Builder](https://induwara.lk/tools/box-shadow-generator) — Visually build CSS box-shadow with offset, blur, spread, colour, and inset controls. Stack up to ten layers, preview live on light, dark, or checker backdrops, copy as CSS or Tailwind v4. Runs entirely in your browser.
- [Character Counter — Twitter, SMS, meta description limits](https://induwara.lk/tools/character-counter) — Count characters with live limit indicators for Twitter / X, SMS (GSM-7 & UCS-2), meta description, Instagram, LinkedIn and more. UTF-16, code-point, and grapheme counts. Runs in your browser.
- [Chmod Calculator — Linux File Permission Calculator (Octal & Symbolic)](https://induwara.lk/tools/chmod-calculator) — Toggle read/write/execute for owner, group and other to get the octal code (755), symbolic string (-rwxr-xr-x) and the exact chmod command. Decodes octal or ls -l strings back the other way, with setuid/setgid/sticky support. Runs in your browser.
- [Color Converter — HEX, RGB, HSL, HSV, CMYK & OKLCH](https://induwara.lk/tools/color-converter) — Convert any color between HEX, RGB, HSL, HSV, CMYK, OKLCH and the 148 CSS named colors. WCAG contrast and color-blindness simulation built in. Runs entirely in your browser.
- [Colour Palette Generator — Harmonies & Image Extraction](https://induwara.lk/tools/color-palette-generator) — Generate eight harmonious palettes (complementary, triadic, analogous, tetradic, square, split-complementary, monochromatic, tints & shades) from a base colour, or extract a six-colour palette from any photo using median-cut quantisation. Export to CSS variables, Tailwind v4, or JSON.
- [Countdown Timer — Days, Hours, Minutes Until Any Date](https://induwara.lk/tools/countdown-timer) — Live countdown to any future date and event with a year/month/day/hour/minute/second breakdown. Add a title and share a link that reopens the same countdown on any device, runs entirely in your browser.
- [Cricket Batting & Bowling Average Calculator](https://induwara.lk/tools/cricket-batting-bowling-average-calculator) — Work out batting average, batting strike rate, bowling average, economy rate and bowling strike rate from raw match numbers. Handles the two things people get wrong by hand, excluding not-outs from the batting-average denominator, and converting base-6 over notation (12.3 = 12 overs 3 balls) before dividing. Free, no signup, runs in your browser.
- [Cricket Net Run Rate (NRR) Calculator](https://induwara.lk/tools/cricket-net-run-rate-calculator) — Compute a cricket team's Net Run Rate from its matches using the official ICC formula, with the all-out full-quota rule and base-6 overs conversion handled correctly, plus a chase mode that tells you exactly how many overs you must chase a target in to reach a desired NRR.
- [Cricket Required Run Rate & Run Chase Calculator](https://induwara.lk/tools/cricket-required-run-rate-calculator) — Work out the live chase numbers in one entry, required run rate (asking rate), current run rate, runs still needed, overs remaining and the projected final score. Handles ODI, T20 and custom over limits with correct six-balls-per-over arithmetic, plus an over-by-over ask table. Runs in your browser, sources cited.
- [Cron Expression Builder — visual crontab generator & explainer](https://induwara.lk/tools/cron-expression-builder) — Build cron expressions visually with per-field inputs and presets. Live human-readable description, next-five-runs preview, POSIX/Vixie crontab semantics, runs entirely in your browser.
- [Cron Expression Generator & Explainer](https://induwara.lk/tools/cron-expression-generator) — Build a valid cron expression from plain-English choices (every N minutes, daily at a time, weekdays only) or paste any cron string to get a plain-English explanation, a field-by-field breakdown, and the next 5 run times. Standard Unix 5-field crontab, fully in-browser.
- [CSS clamp() Fluid Typography Generator](https://induwara.lk/tools/css-clamp-generator) — Generate a copy-paste CSS clamp() value for fluid, responsive font sizes. Enter min/max size and viewport width to get the exact clamp() declaration, the underlying equation, and the rendered size at every breakpoint.
- [CSS Flexbox Generator — Live Playground & Code](https://induwara.lk/tools/css-flexbox-generator) — Interactive CSS Flexbox playground: toggle every flex-container and flex-item property with real controls, watch a live preview rearrange instantly, and copy spec-accurate CSS you can paste straight into your project. Runs entirely in your browser, no signup, no upload, works offline.
- [CSS Gradient Generator — Linear, Radial & Conic](https://induwara.lk/tools/css-gradient-generator) — Build CSS linear, radial, and conic gradients visually. Multi-stop support, angle controls, live preview, and copy-ready CSS or Tailwind v4, runs entirely in your browser, no signup.
- [CSV to JSON Converter — convert CSV/TSV to JSON online](https://induwara.lk/tools/csv-to-json-converter) — Paste or upload CSV/TSV and get clean JSON instantly, quoted fields, custom delimiters, automatic type inference, and dot-notation nesting. Array of objects, array of arrays, or column-keyed output. Runs entirely in your browser, nothing uploaded.
- [Date Difference Calculator — Days, Weeks, Months, Years](https://induwara.lk/tools/date-difference-calculator) — Calculate the exact number of days, weeks, months, and years between any two dates, with an optional business-days-only mode. Leap-year accurate, DST-aware, runs entirely in your browser, no signup, sources cited.
- [Duckworth-Lewis-Stern (DLS) Par Score & Revised Target Calculator](https://induwara.lk/tools/duckworth-lewis-calculator) — Work out the revised target or live par score in a rain-hit ODI or T20 with the official ICC Duckworth-Lewis-Stern Standard Edition resource table. Enter the first-innings score, overs and wickets and get the adjusted target, par (tie) score, both resource percentages and the full working, for club scorers, fantasy players and spectators.
- [Hash Generator — MD5, SHA-1, SHA-256, SHA-384, SHA-512](https://induwara.lk/tools/hash-generator) — Generate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes of text or files entirely in your browser. Optional HMAC mode with a secret key. RFC 1321 / FIPS 180-4 / RFC 2104 conformant, no uploads.
- [HTML / CSS / JS Minifier — beautify and minify online](https://induwara.lk/tools/html-css-js-minifier) — Minify or beautify HTML, CSS, and JavaScript in your browser. Tag-aware HTML, RFC-style CSS, JSMin-safe JS, files never leave your device, no signup.
- [HTML to Markdown Converter](https://induwara.lk/tools/html-to-markdown-converter) — Paste HTML or rich text and get clean, spec-compliant Markdown back instantly, headings, links, GFM tables, task lists, and fenced code blocks preserved. Runs entirely in your browser; the HTML never leaves your device.
- [JSON Formatter & Validator — beautify, minify, fix JSON](https://induwara.lk/tools/json-formatter) — Format, validate, and minify JSON in your browser. Pinpoints syntax errors by line and column, accepts the JSON5 superset (comments, trailing commas, unquoted keys), round-trip verified. No uploads.
- [JSON to Code Generator — Go, Python (Pydantic), Java, Kotlin, C#, Rust](https://induwara.lk/tools/json-to-code-generator) — Paste any JSON sample and instantly generate typed data structures, Go structs, Python dataclass/Pydantic models, Java records, Kotlin data classes, C# classes, or Rust structs, with nested objects extracted, arrays merged, and null/missing keys made optional. Runs entirely in your browser, no upload.
- [JSON to CSV / XML / YAML Converter](https://induwara.lk/tools/json-converter) — Convert JSON to CSV (RFC 4180), XML (1.0 well-formed), or YAML (1.2 block-style) in your browser. Flattens nested objects with a configurable separator. Round-trip verified, no uploads.
- [JSON to TypeScript Converter — generate interfaces from JSON](https://induwara.lk/tools/json-to-typescript-converter) — Paste any JSON and instantly get clean TypeScript interfaces or type aliases, nested objects extracted into named types, array elements merged, null and missing keys turned into optional/nullable members. Runs entirely in your browser, no upload.
- [JSONPath Tester & Evaluator (RFC 9535)](https://induwara.lk/tools/jsonpath-tester) — Paste a JSON document and a JSONPath expression and instantly see every matched value plus its normalized path, evaluated in your browser against the RFC 9535 grammar. Supports wildcards, array slices, filters, recursive descent and the length/count/match/search/value functions. Click any tree node for its exact JSONPath. No signup, nothing uploaded.
- [JWT Decoder — Inspect & Verify JSON Web Tokens](https://induwara.lk/tools/jwt-decoder) — Paste any JSON Web Token to decode the header, payload, and signature, classify each claim, and verify HS256 signatures with the Web Crypto API. RFC 7519 / 7515 conformant, runs in your browser.
- [Lakhs & Crores Converter (to Millions, Billions & Rupees)](https://induwara.lk/tools/lakhs-crores-converter) — Convert any amount between lakhs, crores, thousands, millions and billions instantly. See both comma styles (1,00,00,000 vs 10,000,000), the value in Rupees, the amount in words, and a digit-by-digit place-value breakdown. Exact, in-browser, no signup.
- [Macro Calculator — Protein, Carbs & Fat (Atwater 4·4·9)](https://induwara.lk/tools/macro-calculator) — Set a daily calorie target, pick a macro split, balanced, keto, high-protein, low-carb, IIFYM cut or bulk, and get daily grams of protein, carbohydrate, and fat. Atwater 4·4·9 factors, ISSN 2017 protein bands, runs entirely in your browser, no signup.
- [Meeting Time Zone Planner — find an overlap across cities](https://induwara.lk/tools/meeting-planner) — Find a meeting time that works across multiple time zones. 24-hour overlap grid scores each hour against everyone's working window, DST-aware, runs in your browser, no signup, sources cited.
- [Meta Tag Preview — OG, Twitter, Facebook, LinkedIn, Slack](https://induwara.lk/tools/meta-tag-preview) — See exactly how your page will look when shared on Google, X (Twitter), Facebook, LinkedIn, and Slack. Paste a URL or fill the fields, runs in your browser, validator built in.
- [Number Base Converter — Binary, Octal, Decimal & Hex (Base 2–36)](https://induwara.lk/tools/number-base-converter) — Convert a whole number between any two bases from 2 to 36, binary, octal, decimal and hex, with step-by-step working. Exact BigInt math, no signup, runs in your browser.
- [One Rep Max Calculator — Epley, Brzycki, Lander & Mayhew](https://induwara.lk/tools/one-rep-max-calculator) — Estimate your one-rep max (1RM) from a weight × reps set using four peer-reviewed strength formulas side by side, with a conservative training cap and a percent-of-1RM load table, runs in your browser, no signup, sources cited.
- [Online Alarm Clock — Free Browser Alarm with Snooze](https://induwara.lk/tools/alarm-clock) — Free browser-based alarm clock. Set multiple alarms with custom sounds, weekday repeats, snooze, and a tab-title countdown, runs entirely in your browser, no signup.
- [Online Stopwatch — Millisecond Precision with Lap Times](https://induwara.lk/tools/stopwatch) — Browser-based stopwatch with millisecond precision, unlimited lap recording, CSV export, and keyboard shortcuts. No signup, no ads, runs entirely in your browser.
- [Open OSCAR Server Setup Checker & Config Generator](https://induwara.lk/tools/open-oscar-server-setup-checker) — Pick your AIM or ICQ client and your host machine, and get the port that client must reach, the features that will actually work, a ready-to-paste settings.env listener block, the firewall rules, the first-user API call, plus a CGNAT verdict and the CEB running cost if you are hosting it in Sri Lanka.
- [Oven Temperature Converter — Fahrenheit, Celsius, Gas Mark & Fan/Convection](https://induwara.lk/tools/oven-temperature-converter) — Enter an oven temperature in Fahrenheit, Celsius or gas mark and get all three at once, plus the fan/convection setting under the UK −20 °C rule, the US −25 °F rule and the 10% rule. Shows the exact arithmetic alongside the number a recipe chart prints, and the setting you can actually select on a marked dial.
- [Pace Calculator — Running, Min/Km & Race Time](https://induwara.lk/tools/pace-calculator) — Calculate running or walking pace from time and distance (min/km or min/mile), and predict 5K, 10K, half marathon, and marathon finish times with the Riegel formula. Free, no signup, sources cited, runs entirely in your browser.
- [Password Generator — strong, random, with live entropy meter](https://induwara.lk/tools/password-generator) — Generate strong random passwords or memorable passphrases. Customise length, character sets, and ambiguous-character exclusion. Live entropy meter follows NIST SP 800-63B. Crypto-secure (Web Crypto), zero uploads.
- [Percentage Calculator](https://induwara.lk/tools/percentage-calculator) — All-in-one percentage calculator, what is X% of Y, X is what % of Y, X is Y% of what, percentage increase or decrease, adjust a number by a percentage, and percentage difference. Each answer shows the formula, step-by-step working and a plain-English sentence. Free, runs in your browser, sources cited.
- [Pomodoro Timer — 25-Minute Focus & Break Cycles](https://induwara.lk/tools/pomodoro-timer) — Free Pomodoro timer with the classic 25-minute focus + 5-minute break cycle and long break every four sessions. Customisable durations, two-tone audio chime, tab-title countdown, runs in your browser, no signup.
- [Porondam Matching Sri Lanka — Horoscope Compatibility](https://induwara.lk/tools/sri-lanka-porondam-matching) — Enter both birth dates and times to score the eight porondam and the 36-guna Ashtakoota horoscope match, with Nadi and Bhakoot dosha flags. Each birth star and rasi is computed from the Moon's sidereal position with Meeus astronomy and the Lahiri ayanamsa, sources cited.
- [Pounds to Grams Converter — Exact lb to g Conversion Chart & Calculator](https://induwara.lk/tools/pounds-to-grams-converter) — Convert pounds to grams using the exact 453.59237 g factor fixed by the 1959 International Yard and Pound Agreement. Handles decimals, fractions and "5 lb 4 oz" style inputs, converts to grams, kilograms, ounces, stone and tonnes at once, and shows a quick-reference lb → g chart. Every factor sourced to NIST.
- [PPI & Pixel Density Calculator — screen sharpness from resolution](https://induwara.lk/tools/ppi-pixel-density-calculator) — Compute pixel density (PPI/PPCM), dot pitch, physical size, megapixels and a Retina-sharpness verdict from any resolution and screen size, then compare your display against common phones, laptops, monitors and TVs. Runs entirely in your browser.
- [Pregnancy Due Date Calculator — LMP, Scan, Conception](https://induwara.lk/tools/pregnancy-due-date-calculator) — Estimate your due date from last menstrual period, conception date, or dating ultrasound. Naegele's rule with cycle adjustment, trimester progress, week-by-week milestones, ACOG-aligned, runs in your browser, no signup.
- [QR Code Generator — URLs, Wi-Fi, vCards, and more](https://induwara.lk/tools/qr-code-generator) — Generate QR codes for URLs, text, Wi-Fi, vCards, email, phone, or SMS. Customise colours, set error-correction level, add a centre logo. Encoded entirely in your browser, no signup, downloads as PNG or SVG.
- [Random Name Generator — by origin, gender, and style](https://induwara.lk/tools/random-name-generator) — Generate random first and last names filtered by origin (English, Sinhala, Tamil, Spanish, Japanese, fantasy, sci-fi), gender, and format (full name, username, email). Shareable seeds, no signup, runs in your browser.
- [Random Picker — pick a name, number, or weighted choice](https://induwara.lk/tools/random-picker) — Pick a random item from a list, a random number from a range, or a weighted choice. Crypto-fair (Web Crypto + rejection sampling), reproducible with a seed, χ² self-test built in. Runs entirely in your browser, no signup.
- [Regex Tester — Test & Debug Regular Expressions Online](https://induwara.lk/tools/regex-tester) — Test JavaScript regular expressions against any text with live highlighting, capture groups, replacement preview, flag toggles, and a construct-by-construct explainer. ECMA-262, runs entirely in your browser.
- [Roman Numeral Converter — number ↔ Roman](https://induwara.lk/tools/roman-numeral-converter) — Convert any number to Roman numerals and any valid Roman numeral back to a number, instantly. Handles 1–3,999 plus optional vinculum notation to 3,999,999, validates malformed input, and shows the digit-by-digit breakdown. Free, no signup.
- [Secret Chat — Private, Encrypted, Self-Destructing Chat](https://induwara.lk/tools/secret-chat) — Create an end-to-end encrypted chat, share the link, and message privately with media. Nothing readable is stored and the chat self-destructs on a timer. No signup.
- [Send a One-Time Secret — Share a Password Securely (Free Privnote Alternative)](https://induwara.lk/tools/one-time-secret) — Paste a password, API key, or private note and get a self-destructing one-time link. End-to-end encrypted in your browser; our server never sees it. A free Privnote alternative, no signup.
- [Send a Self-Destructing File — Encrypted Anonymous File Share (No Signup)](https://induwara.lk/tools/secret-file) — Upload a file up to 3 MB and get a one-time link. The file is encrypted in your browser before upload, destroyed after one download or when the timer expires. A free, no-signup alternative to WeTransfer for sending one private file.
- [Singapore Employment Pass COMPASS Points Calculator](https://induwara.lk/tools/singapore-employment-pass-compass-calculator) — Score a Singapore Employment Pass application under MOM's COMPASS framework, the four foundational criteria (Salary, Qualifications, Diversity, Local support) plus the two bonus criteria, against the 40-point pass mark, with the S$22,500 salary exemption built in. Free, no signup, sources cited.
- [Sleep Cycle Calculator — Best Bedtime & Wake Time](https://induwara.lk/tools/sleep-cycle-calculator) — Find the best bedtime for your wake-up alarm, or the best wake times if you sleep now. Aligns with 90-minute REM cycles, accounts for sleep-onset latency, sources cited, runs in your browser, no signup.
- [Soundex Calculator (Phonetic Name Coding)](https://induwara.lk/tools/soundex-calculator) — Convert any name to its American Soundex code (e.g. Robert → R163) using the official U.S. National Archives rules, with a full step-by-step derivation of how each letter is mapped, skipped or collapsed. Runs entirely in your browser.
- [Speech Time Calculator (Words to Minutes)](https://induwara.lk/tools/speech-time-calculator) — Convert words to spoken minutes and back at slow, conversational, average or fast pace. Find how many words a 5-minute speech needs, compare paces, and see silent-reading time. Free, instant, runs in your browser.
- [SQL Formatter — beautify, minify & pretty-print SQL online](https://induwara.lk/tools/sql-formatter) — Beautify or minify SQL for MySQL, PostgreSQL, SQLite, SQL Server, Oracle, BigQuery, and Snowflake. Dialect-aware parser, idempotent output, runs entirely in your browser, no uploads.
- [Sri Lanka .lk Domain Price Calculator (Official Registry Rates)](https://induwara.lk/tools/sri-lanka-lk-domain-price-calculator) — Find the exact official LK Domain Registry price to register or renew a .lk, .com.lk, .org.lk or other Sri Lankan domain for 1, 2, 5 or 10 years, with the Budget/Economy/Standard/Desirable/Premium tier auto-detected, multi-year discounts and 18% VAT included.
- [Sri Lanka Air Conditioner Size (BTU) Calculator](https://induwara.lk/tools/sri-lanka-air-conditioner-size-calculator) — Find the right air conditioner size in BTU and tons for any room in Sri Lanka's hot-humid climate, then estimate the monthly running cost on the CEB tariff, inverter versus non-inverter. Sources cited, no signup.
- [Sri Lanka Bank Branch Code & SWIFT Finder](https://induwara.lk/tools/sri-lanka-bank-branch-code-finder) — Look up the LankaPay branch code, SLIPS routing, and SWIFT BIC for any Sri Lankan bank branch. Reverse-decode any code back to its bank, branch, district and province. Free, no signup.
- [Sri Lanka Birth Certificate Correction & Name Change Checker](https://induwara.lk/tools/sri-lanka-birth-certificate-correction-checker) — Tells you which of the Registrar General's eight birth forms your case needs, B7, B8, B9, B10, B37A, B6, B63 or CR1, who is allowed to sign it, which written evidence goes with it, which office receives it, and what it costs in rupees from the RGD's own five-row fee schedule. Covers a name never entered, a misspelt name, a wrong date, place or gender, and a birth that was never registered at all.
- [Sri Lanka Birth Chart & Lagna Calculator (Kendaraya / Handahana)](https://induwara.lk/tools/sri-lanka-birth-chart-calculator) — Enter a birth date, time and place in Sri Lanka for a full sidereal (Lahiri) Rasi chart, the Lagna (ascendant), all nine grahas by sign, the janma nakshatra and the Vimshottari dasha. Correct 1996–2006 Asia/Colombo time offsets applied automatically. No signup, no predictions.
- [Sri Lanka Brick & Block Wall Material Calculator](https://induwara.lk/tools/sri-lanka-wall-material-calculator) — Estimate exactly how many cement blocks or bricks, 50 kg cement bags, and cubes of sand a masonry wall needs from its length, height and thickness, using SLS unit sizes, your mortar mix and a wastage allowance. Reports sand in cubes and m³, with an optional rupee cost.
- [Sri Lanka Buddhist Era Year Converter](https://induwara.lk/tools/sri-lanka-buddhist-era-year-converter) — Convert any Gregorian date to the Sri Lankan Buddhist Era (BE) year and back, applying the Vesak Full Moon Poya turnover and the +543/+544 offset. Shows the Sinhala බුද්ධ වර්ෂ label, before/after-Vesak status, and a Gregorian→BE reference table.
- [Sri Lanka Cable Size Calculator (Wire Gauge / Amp Rating)](https://induwara.lk/tools/sri-lanka-cable-size-calculator) — Find the correct copper or aluminium cable size for an electrical load in Sri Lanka, in both mm² and local strand notation (7/0.67, 7/0.85…), with the matching MCB rating, ambient and grouping derating, and a 4% voltage-drop check. Free, no signup, sources cited.
- [Sri Lanka Concrete Mix Calculator](https://induwara.lk/tools/sri-lanka-concrete-mix-calculator) — Work out cement bags, cubes of sand and metal, water and cost for any concrete pour in Sri Lanka. Pick 1:2:4, 1:1.5:3 or a custom nominal mix, enter your slab dimensions, and get a hardware-ready material list in cubes and cubic feet.
- [Sri Lanka Court Finder — Magistrate's & District Court by area](https://induwara.lk/tools/sri-lanka-court-finder) — Find the Magistrate's Court and District Court with jurisdiction over any town, Grama Niladhari division or DS division in Sri Lanka. All 34 judicial zones, 85 judicial districts and 105 judicial divisions declared under section 3 of the Judicature Act, with the Schedule clause cited.
- [Sri Lanka Divisional Secretariat (DS) Division Finder](https://induwara.lk/tools/sri-lanka-divisional-secretariat-finder) — Find any Divisional Secretariat in Sri Lanka by province and district, or search all 331 DS divisions by name in English, Sinhala, or Tamil. Census 2012 data, sources cited.
- [Sri Lanka Divorce Procedure Checker — grounds, forum and timeline](https://induwara.lk/tools/sri-lanka-divorce-procedure-checker) — Three regimes govern divorce in Sri Lanka, and the register your marriage was entered in decides which. Check whether your ground is open to you, which forum hears it, District Court, District Registrar or Quazi, and the earliest lawful date, each with its section number.
- [Sri Lanka Fuel Price Today (Petrol & Diesel Price + Fill-Up Cost)](https://induwara.lk/tools/sri-lanka-fuel-price-today) — Today's Sri Lanka retail fuel prices for every grade, Petrol 92 & 95 Octane, Auto Diesel, Super Diesel and Kerosene, across CEYPETCO, Lanka IOC and Sinopec, with a fill-up cost calculator and recent price-revision history. Sources cited.
- [Sri Lanka Government Job Eligibility Checker (Age & Qualifications)](https://induwara.lk/tools/sri-lanka-government-job-eligibility-checker) — Enter your qualification and your age on the closing date and see which of 14 all-island Sri Lankan public-service posts you can apply for — SLAS, Planning, Accountants', Scientific, SLEAS, Inland Revenue, the ICT Service grades, Development Officer, Public Management Assistant, Office Employees', Teachers' and Translators'. Each row carries the published age band, minimum qualification, entry route, gazette citation and the PAC 03/2016 entry salary where it reconciles. Posts you miss show the single blocking rule.
- [Sri Lanka Grama Niladhari (GN) Division Finder](https://induwara.lk/tools/sri-lanka-grama-niladhari-division-finder) — Search all 14,043 Grama Niladhari divisions in Sri Lanka by name in English or Sinhala, or by P-code, and list every GN division inside any Divisional Secretariat. Survey Department data, sources cited.
- [Sri Lanka Heat Index Calculator ("Feels Like" Temperature)](https://induwara.lk/tools/sri-lanka-heat-index-calculator) — Enter temperature and humidity to get the heat index, the 'feels like' temperature, using the exact US National Weather Service formula, mapped to Sri Lanka Department of Meteorology advisory bands with safety guidance. Free, no signup.
- [Sri Lanka Hijri Date Converter (Islamic Calendar)](https://induwara.lk/tools/sri-lanka-hijri-date-converter) — Convert any Gregorian date to the Islamic (Hijri) date and back, see today's Hijri date for Sri Lanka, and get this year's Ramadan, Eid, and Muharram dates, with the ACJU moon-sighting caveat. Free, no signup, sources cited.
- [Sri Lanka Home Inverter & Battery Backup Calculator](https://induwara.lk/tools/sri-lanka-inverter-battery-calculator) — Size the inverter and battery bank needed to run your home appliances through a Sri Lankan power cut, with realistic runtime and cost.
- [Sri Lanka Hora Calculator (Subha Hora / Planetary Hours)](https://induwara.lk/tools/sri-lanka-hora-calculator) — Shows all 24 planetary Horas (Subha Hora) for any date and Sri Lankan city, each hour's ruling planet, its benefic or malefic nature, and traditional use, computed from real sunrise and sunset.
- [Sri Lanka House Construction Cost Calculator](https://induwara.lk/tools/sri-lanka-house-construction-cost-calculator) — Estimate the cost to build a house in Sri Lanka from floor area and finish grade, a low–mid–high LKR range with a CIDA cost-head breakdown, using guideline per-square-foot rate bands. Free, no signup, sources cited.
- [Sri Lanka Inheritance Calculator (No Will / Intestate — General Law)](https://induwara.lk/tools/sri-lanka-intestate-inheritance-calculator) — Work out who legally inherits when someone dies without a will in Sri Lanka under the General Law. Enter the net estate and who survives, spouse, children, parents, siblings, and get each heir's exact fraction, percentage and rupee amount. Sources cited, no signup.
- [Sri Lanka Interlock Paving Calculator](https://induwara.lk/tools/sri-lanka-interlock-paving-calculator) — Estimate how many interlock paving blocks, cubes of bedding sand and jointing-sand bags a driveway, carport or garden path needs in Sri Lanka. Pick the block shape and wastage, enter the size, and get a hardware-ready order list in cubes and cubic feet with an optional rupee cost.
- [Sri Lanka Internet Package Comparison — Real Monthly Bill After Tax](https://induwara.lk/tools/sri-lanka-internet-package-comparison) — Every published SLT-Mobitel and Dialog home broadband package converted from its advertised rental to the bill you actually pay, after the 23.50% telecom tax stack. Ranks by real cost per GB, per Mbps and total over 12 or 24 months, and works backwards from a bill you already pay.
- [Sri Lanka Labour Office Finder — District Offices & Complaints](https://induwara.lk/tools/sri-lanka-labour-office-finder) — Find the Department of Labour office for your district — all 79 offices with phone numbers — plus which authority and Act your complaint falls under.
- [Sri Lanka Land Area Converter (Perches, Roods, Acres, Hectares)](https://induwara.lk/tools/sri-lanka-land-area-converter) — Convert Sri Lankan land area between perches, square feet, square metres, roods, acres, hectares, square yards, and cents. Deed notation (a-r-p) supported, sources cited.
- [Sri Lanka Legal Age Checker](https://induwara.lk/tools/sri-lanka-legal-age-checker) — The legal age for every activity Sri Lankan law fixes one for: being sold alcohol or tobacco (21), employment (16), voting (18), standing for President (30), each class of driving licence, a first NIC, Grade 1 and the retirement floor. Every figure names its Act and section. Enter a date of birth to see which thresholds are reached and the exact date each remaining one unlocks.
- [Sri Lanka Local Authority Finder (Municipal Council / Urban Council / Pradeshiya Sabha)](https://induwara.lk/tools/sri-lanka-local-authority-finder) — Find which of Sri Lanka's 341 local authorities your town falls under, Municipal Council, Urban Council or Pradeshiya Sabha, with its district, governing statute and official gov.lk site.
- [Sri Lanka Long Weekend & Leave Planner 2026](https://induwara.lk/tools/sri-lanka-long-weekend-planner) — Find every long weekend in Sri Lanka's gazetted 2026 holiday calendar and the smartest days to take annual leave, turn 3 leave days into 9 days off. Public, Bank and Mercantile sets. Free, no signup, sources cited.
- [Sri Lanka LP Gas Price Calculator — Litro & Laugfs (2026)](https://induwara.lk/tools/sri-lanka-lp-gas-price-calculator) — Look up the current CAA max retail price for Litro and Laugfs LP gas cylinders in Sri Lanka, compare cost-per-kg across sizes, and estimate your monthly cooking-gas cost.
- [Sri Lanka Marriage Registration Procedure Checker](https://induwara.lk/tools/sri-lanka-marriage-procedure-checker) — Work out which register your marriage goes into, General, Kandyan or Muslim, whether you satisfy the notice, age and residence tests, and the earliest date you can lawfully marry. Counts the 14-day notice period and the 14-working-day licence lead time for a foreign national from your own dates.
- [Sri Lanka Medicine Price Lookup (NMRA MRP, 2026)](https://induwara.lk/tools/sri-lanka-medicine-price-lookup) — Look up the legal Maximum Retail Price (MRP) of essential medicines in Sri Lanka. Type a brand (Panadol, Cozaar) or generic (paracetamol, losartan) and see the gazetted NMRA ceiling.
- [Sri Lanka Mobile Number Prefixes — 07X Operator Code List](https://induwara.lk/tools/sri-lanka-mobile-number-network-checker) — The full TRCSL 07X prefix list: which operator each of 070-078 was allocated to, which codes are unassigned, and clean local and +94 formats for any Sri Lankan mobile number. Runs entirely in your browser, no signup.
- [Sri Lanka Mobile Reload Tax Calculator (TL + VAT, 2026)](https://induwara.lk/tools/sri-lanka-mobile-reload-tax-calculator) — Find out exactly how much of your Dialog, Mobitel, Hutch, or Airtel reload becomes airtime versus tax. Telecommunication Levy + VAT breakdown, with a reverse mode for any target airtime.
- [Sri Lanka Moon Phase & Poya Day Calculator](https://induwara.lk/tools/sri-lanka-moon-phase-poya-calculator) — Find tonight's moon phase, illumination and age, see if today is a Poya, and browse the full-year Poya calendar with names (Duruthu–Unduvap), computed from deterministic Meeus astronomy in Sri Lankan time.
- [Sri Lanka Nakshatra Baby Name Letter Finder (Birth Star)](https://induwara.lk/tools/sri-lanka-nakshatra-name-letter-finder) — Enter a baby's date and time of birth in Sri Lanka time to find the janma nakshatra (birth star) and pada, then the classical auspicious starting letter for the name, Moon position computed with Meeus astronomy and the Lahiri ayanamsa, sources cited.
- [Sri Lanka NIC Number Decoder & Validator](https://induwara.lk/tools/sri-lanka-nic-decoder) — Decode any Sri Lankan NIC (old 9-digit + V/X or new 12-digit) to its date of birth, age, gender, voter status, and serial. Validates structure instantly, runs entirely in your browser.
- [Sri Lanka Number to Words Converter (LKR Cheque Format)](https://induwara.lk/tools/sri-lanka-number-to-words-converter) — Write any LKR cheque amount in words: English, Sinhala and Tamil, exact bank format with "Rupees X and Cents Y Only". Free, no signup.
- [Sri Lanka Old NIC to New NIC Converter](https://induwara.lk/tools/sri-lanka-nic-converter) — Convert a Sri Lankan old 10-character NIC to the new 12-digit number (and back) with date of birth and gender decoded, using the Department for Registration of Persons numbering rule.
- [Sri Lanka Outward Remittance Limit Calculator (CBSL Rules)](https://induwara.lk/tools/sri-lanka-outward-remittance-limit-calculator) — How much can a Sri Lankan resident send abroad? Check the AD cap, CBSL approval gate, LKR cost (stamp duty + bank fees + FEL), and required Form A documents by purpose.
- [Sri Lanka Paddy Fertilizer Calculator — Urea, TSP, MOP per acre](https://induwara.lk/tools/sri-lanka-paddy-fertilizer-calculator) — Work out exactly how much Urea, TSP, MOP and zinc sulphate to buy and apply for your paddy field, the Department of Agriculture / RRDI recommendation for your zone, water regime and rice age class, scaled to your extent in acres, hectares or perches, with the full basal + top-dressing schedule. Free, no signup, sources cited.
- [Sri Lanka Paint Calculator — litres & tins for a room](https://induwara.lk/tools/sri-lanka-paint-calculator) — Work out exactly how many litres of paint and how many tins (20 L / 4 L / 1 L) you need to paint a room or wall in Sri Lanka. Subtracts doors and windows, adds a wastage margin, and uses CIDA and manufacturer spreading rates.
- [Sri Lanka Parliamentary Election Seat Calculator](https://induwara.lk/tools/sri-lanka-election-seat-calculator) — Turn district vote counts into parliamentary seats. Applies Sri Lanka's official 5% cut-off, the bonus seat, and the Hare-quota largest-remainder method across all 22 electoral districts. Free, no signup, sources cited.
- [Sri Lanka Phone Number Lookup & Validator](https://induwara.lk/tools/sri-lanka-phone-number-lookup) — Validate any Sri Lankan phone number, find its network operator (Dialog, SLT-Mobitel, Hutch) or the area code's city, and convert it to local, +94 E.164, and SMS-gateway formats. Runs entirely in your browser, no signup.
- [Sri Lanka Plastering Calculator (Cement & Sand)](https://induwara.lk/tools/sri-lanka-plastering-calculator) — Work out how many 50 kg cement bags and cubes of sand you need to plaster a wall or ceiling in Sri Lanka. Pick the thickness and 1:5, 1:4 or a custom mix, enter the area, and get a hardware-ready material list in cubes and cubic feet with an optional rupee cost.
- [Sri Lanka Police & Tri-Forces Recruitment Eligibility Checker](https://induwara.lk/tools/sri-lanka-police-army-recruitment-eligibility-checker) — Enter your date of birth, sex, height, weight, chest and exam results and see which of ten Sri Lanka Police, Army, Navy and Air Force entry posts you meet the published standard for — the age band on its own reference date, the height floor in the notice's own centimetres, the chest, BMI and vision rules, and the exact O/L or A/L wording. Posts you miss name the single blocking rule and the date you age out. Every figure is cited to its own gazette notice, and a criterion a notice does not publish is shown as “not published” rather than guessed.
- [Sri Lanka Police Station Finder — contact numbers for all 608 stations](https://induwara.lk/tools/sri-lanka-police-station-finder) — Search all 608 Sri Lanka Police stations by name, town, division or province and get the OIC mobile and station landline as tappable numbers, plus the 119 / 1997 / 1818 / 109 hotlines. Transcribed from the official police.lk directory, no signup.
- [Sri Lanka Post Rate Calculator (Letter, Parcel, EMS)](https://induwara.lk/tools/sri-lanka-post-rate-calculator) — Work out exactly what Sri Lanka Post will charge for any letter, parcel, registered item or EMS Speed Post, inland or international, sources cited line by line.
- [Sri Lanka Postal Code Finder — ZIP Code Lookup](https://induwara.lk/tools/sri-lanka-postal-code-finder) — Free Sri Lanka postal code finder: look up the 5-digit ZIP for any town, city, suburb or post office, decode a code into its post office, district and province, or browse all data A–Z by district.
- [Sri Lanka Prayer Times (Salah, Sehri & Iftar)](https://induwara.lk/tools/sri-lanka-prayer-times) — Today's Fajr, Dhuhr, Asr, Maghrib (Iftar) and Isha plus Sehri and sunrise for Colombo and 20+ Sri Lankan cities. ACJU-recognised 18° convention, computed in your browser, no signup, no location access.
- [Sri Lanka Presidential Election Preference (Second Count) Calculator](https://induwara.lk/tools/sri-lanka-presidential-election-preference-calculator) — Work out who wins a Sri Lankan presidential election under the contingent-vote rules: test the 50% first-count majority, eliminate all but the top two, and add transferred second preferences to settle the second count. Reproduces the 2024 result. Free, no signup, sources cited.
- [Sri Lanka Public Holidays 2026 — Calendar with .ics Export](https://induwara.lk/tools/sri-lanka-public-holidays-calendar) — Every gazetted Sri Lanka public, bank and mercantile holiday for 2026 with English, Sinhala and Tamil names, live countdown to the next holiday, filters, and one-click .ics download.
- [Sri Lanka Qibla Direction Finder — Compass & Bearing](https://induwara.lk/tools/sri-lanka-qibla-direction-finder) — Find the exact Qibla direction toward the Kaaba in Makkah from any city in Sri Lanka, true-north bearing in degrees, a live rotating compass, distance to Makkah, and a per-city reference table. Computed in your browser, no signup.
- [Sri Lanka Rahu Kalaya Calculator (Rahu Kaalam Today)](https://induwara.lk/tools/sri-lanka-rahu-kalaya-calculator) — Calculates the daily Rahu Kalaya, Yamaganda and Gulika Kaalam time windows for any date and Sri Lankan city from real sunrise and sunset.
- [Sri Lanka Rainwater Harvesting Calculator](https://induwara.lk/tools/sri-lanka-rainwater-harvesting-calculator) — Estimate how many litres of rainwater your roof can collect per year in Sri Lanka from roof area, roof-type runoff coefficient, and your district's annual rainfall, plus the share of household demand met and a suggested storage-tank size.
- [Sri Lanka Roofing Sheet Calculator](https://induwara.lk/tools/sri-lanka-roofing-sheet-calculator) — Work out how many roofing sheets, ridge caps, purlins and screws a roof needs from its plan size and pitch, for UPVC/ASA, metal tile-profile and fibre-cement sheets sold in Sri Lanka. Optional rupee cost. CIDA/SLS geometry, sources cited.
- [Sri Lanka Septic Tank Size Calculator — litres, m³ & dimensions](https://induwara.lk/tools/sri-lanka-septic-tank-size-calculator) — Size a domestic septic tank for a Sri Lankan house from the number of occupants, wastewater type and desludging interval. Returns the required liquid volume in litres and m³ plus a suggested length × width × depth, using the SLS 745 / IS 2470 design method.
- [Sri Lanka Sinhala Tamil New Year Nekath 2026 — Auspicious Times](https://induwara.lk/tools/sri-lanka-sinhala-tamil-new-year-nekath) — Government Astrologer's nekath times for Sri Lanka's 2026 Aluth Avurudda / Puthandu: dawn, hearth lighting, first meal, anointing, departure for work, with colours, directions and a one-click calendar export.
- [Sri Lanka Solar Panel Size Calculator — how many panels do I need?](https://induwara.lk/tools/sri-lanka-solar-panel-size-calculator) — Find the rooftop solar system size you need in Sri Lanka from your monthly CEB units, recommended kWp, number of panels, roof area, inverter size, generation and CO₂ offset. Zone irradiance from Global Solar Atlas. Free, no signup, sources cited.
- [Sri Lanka Steel Bar Weight & Cost Calculator](https://induwara.lk/tools/sri-lanka-steel-bar-weight-calculator) — Convert reinforcement bar length into weight (kg), the number of standard bars to order, and total cost in rupees. Handles every SL bar size (R6–T32) in one bill using the SLS 375 / BS 4449 d²/162.28 formula, with wastage and per-kg pricing. Free, no signup, sources cited.
- [Sri Lanka Sunrise & Sunset Time Calculator](https://induwara.lk/tools/sri-lanka-sunrise-sunset-time) — Exact sunrise, sunset, solar noon, day length, twilight and golden-hour times for any Sri Lankan city and date, computed with the NOAA solar algorithm in UTC+5:30.
- [Sri Lanka Telephone Area Code Finder](https://induwara.lk/tools/sri-lanka-telephone-area-code-finder) — Two-way lookup for Sri Lankan landline area codes, type a city to get its code (Kandy → 081), or paste a number to find its region and its +94 international format. Covers all geographic codes and formats any number into local, international, and E.164 form. Runs in your browser, sources cited.
- [Sri Lanka Tile Calculator — Tiles & Boxes to Buy](https://induwara.lk/tools/sri-lanka-tile-calculator) — Work out how many floor or wall tiles and sealed boxes you need for any room in Sri Lanka. Subtracts doors and openings, adds a cutting-wastage margin, rounds up to whole boxes, and turns it into a rupee cost, using SL tile sizes and CIDA wastage allowances.
- [Sri Lanka Vehicle Emission Test Standards Checker](https://induwara.lk/tools/sri-lanka-vehicle-emission-standards-checker) — The exact legal CO, HC and diesel-smoke limits a Sri Lankan vehicle must meet to pass its annual emission test (VET). Type your printout values for an instant pass/fail verdict and margin, with the full standards table. Limits from Gazette 1887/20 (2014).
- [Sri Lanka Voter Eligibility & Registration Checker](https://induwara.lk/tools/sri-lanka-voter-eligibility-checker) — Check whether you can register to vote in Sri Lanka: citizenship, your exact age on the 1 June qualifying date, residence, and the constitutional disqualifications. Computes the first register year for anyone still under 18 and lays out the official registration steps. Free, no signup, sources cited.
- [Sri Lanka Water Tank & Sump Size Calculator](https://induwara.lk/tools/sri-lanka-water-tank-size-calculator) — Sizes the overhead tank and ground sump a Sri Lankan household needs from occupants and per-capita water demand, and converts tank dimensions (rectangular or cylindrical) to capacity in litres, cubic metres and gallons.
- [Sri Lanka Working Days Calculator — Public Holidays 2026](https://induwara.lk/tools/sri-lanka-working-days-calculator) — Count working days in Sri Lanka with all 2026 public holidays built in. For leave planning, notice periods, and payroll. Mercantile, Bank, Government sectors. Free.
- [Subtitle Reading Speed Calculator (CPS & WPM Checker)](https://induwara.lk/tools/subtitle-reading-speed-calculator) — Paste a subtitle cue and its on-screen duration to get characters-per-second (CPS) and words-per-minute (WPM), check it against Netflix (17 CPS), BBC and EBU limits, and find the minimum duration the line needs. Runs in your browser, no signup.
- [Syllable Counter — Count Syllables in Words & Poems](https://induwara.lk/tools/syllable-counter) — Count the syllables in any word, sentence, or poem with a per-word breakdown, hyphenated breaks, and line-by-line totals. Includes a haiku, limerick, and cinquain pattern checker, validated against the CMU Pronouncing Dictionary. Runs entirely in your browser.
- [TDEE Calculator — BMR + Daily Calories, Mifflin & Katch-McArdle](https://induwara.lk/tools/tdee-calorie-calculator) — Calculate your Basal Metabolic Rate and Total Daily Energy Expenditure using Mifflin-St Jeor or Katch-McArdle. Pick an activity level and see four calorie targets, aggressive cut, moderate cut, maintenance, lean bulk, with macro splits, all in your browser, no signup.
- [Timezone Converter — DST-aware time conversion across cities](https://induwara.lk/tools/timezone-converter) — Convert any wall-clock time between two cities with full daylight-saving awareness. Curated list of 50+ IANA zones, offset and abbreviation labels, runs entirely in your browser, no signup, no network calls, sources cited.
- [TOTP / 2FA Authenticator Code Generator](https://induwara.lk/tools/totp-authenticator-generator) — Turn a Base32 secret into the live 6- or 8-digit TOTP an authenticator app would show right now, with a countdown to the next code, or generate a fresh secret plus a scannable otpauth QR to set up 2FA. RFC 6238, runs entirely in your browser.
- [Typing Speed Test (WPM, Accuracy)](https://induwara.lk/tools/typing-speed-test) — Measure your typing speed in words per minute, net (accuracy-adjusted) WPM, and accuracy, live as you type. English, Sinhala, and Tamil passages, timed runs, no signup, runs entirely in your browser.
- [Unit Converter (Length, Weight, Temperature & More)](https://induwara.lk/tools/unit-converter) — Convert between length, mass, temperature, area, volume, speed, time, and digital-storage units using exact SI/NIST factors, with Sri Lankan land units (perch, rood, acre) built in, free, in-browser, no signup.
- [Uptime / SLA Downtime Calculator](https://induwara.lk/tools/uptime-sla-calculator) — Convert any uptime SLA (99.9%, 99.99%, five nines) into the exact downtime it allows per day, week, month and year, or reverse from real downtime to the uptime % you hit, with AWS, Google Cloud and Azure service-credit bands. Free, no signup, sources cited.
- [URL Encoder & Decoder — percent-encoding, UTF-8 safe](https://induwara.lk/tools/url-encoder-decoder) — Percent-encode text for safe inclusion in URLs, or decode URL-encoded strings back to plain text. Component, whole-URI, and form-urlencoded profiles. RFC 3986 conformant, UTF-8 round-trip verified. Runs entirely in your browser.
- [UTM Builder — GA4 Channel-Aware Campaign URL Generator](https://induwara.lk/tools/utm-builder) — Build correctly-formatted UTM campaign URLs and see which GA4 Default Channel Group each link will land in, entirely in your browser.
- [UUID Generator — v4 random & v7 time-ordered (RFC 9562)](https://induwara.lk/tools/uuid-generator) — Generate UUID v4 (random) or v7 (time-ordered) in your browser. Bulk up to 1,000 at a time, copy or download as .txt/.csv, inspect any UUID for version, variant, and embedded timestamp. RFC 9562 conformant.
- [Water Intake Calculator — Daily Hydration Target, Free](https://induwara.lk/tools/water-intake-calculator) — Calculate your daily water target from body weight, exercise minutes, climate, and pregnancy or breastfeeding status. Uses NASEM 2005 Adequate Intake, EFSA 2010 reference values, and the ACSM exercise replacement rate, runs in your browser, no signup.
- [Word Counter — count words, characters & reading time](https://induwara.lk/tools/word-counter) — Count words, characters, sentences, paragraphs, reading time, and speaking time as you type. Two-method verified, Unicode-aware, runs entirely in your browser.
- [World Clock — Live time across cities, DST-aware](https://induwara.lk/tools/world-clock) — Pin up to 20 cities and watch their clocks tick side by side. Daylight-saving and historical offsets come from the IANA tz database via your browser's Intl API, no signup, no ads, no network calls.
- [XML Sitemap Generator — free sitemap.xml builder](https://induwara.lk/tools/xml-sitemap-generator) — Turn a list of page URLs into a valid, standards-compliant sitemap.xml with optional lastmod, changefreq and priority. Validates against the sitemaps.org protocol limits, splits large lists into a sitemap index, and runs entirely in your browser, no crawling, no upload, no signup.

### Travel (82)

- [Adam's Peak (Sri Pada) Season & Sunrise Planner](https://induwara.lk/tools/sri-lanka-adams-peak-season-planner) — Check whether the Sri Pada pilgrimage season is open on your date, get the exact Unduvap-to-Vesak Poya season dates, the sunrise time seen from the 2,243 m summit, and the hour to leave your trailhead to beat it.
- [Australia Skilled Migration Points Calculator](https://induwara.lk/tools/australia-skilled-migration-points-calculator) — Calculate your Australia skilled migration points for the subclass 189, 190 and 491 visas from age, English, work experience, qualifications and bonus factors, with a full per-category breakdown from the official Department of Home Affairs points table.
- [Austria Red-White-Red Card Points Calculator](https://induwara.lk/tools/austria-red-white-red-card-points-calculator) — Score your Austria Red-White-Red Card eligibility with the official migration.gv.at points system, Very Highly Qualified Workers (70/100) and Skilled Workers in Shortage Occupations (55/90). Full per-criterion breakdown, gap suggestions, sources cited.
- [Canada Express Entry CRS Score Calculator](https://induwara.lk/tools/canada-express-entry-crs-calculator) — Calculate your Canada Express Entry Comprehensive Ranking System (CRS) score from age, education, IELTS/CELPIP language, work experience, spouse and additional factors, with a full per-factor breakdown from the official IRCC grid.
- [Canada Express Entry Proof of Funds Calculator](https://induwara.lk/tools/canada-express-entry-proof-of-funds-calculator) — Work out the exact settlement funds you must show for Canada Express Entry (FSW/FST) by family size, using the official IRCC table effective 28 July 2025. Flags the Canadian Experience Class and valid-job-offer exemptions, and converts the requirement to Sri Lankan Rupees.
- [Canada Study Permit Proof of Funds Calculator](https://induwara.lk/tools/canada-study-permit-proof-of-funds-calculator) — Calculate the exact funds a Sri Lankan student must prove for a Canada study permit, IRCC living-expense figure by family size plus tuition and travel, shown in CAD and LKR.
- [EU Blue Card Eligibility & Salary Threshold Checker](https://induwara.lk/tools/eu-blue-card-eligibility-checker) — Check whether you meet the EU Blue Card qualification, 6-month contract, and country-specific gross salary threshold, including the reduced shortage-occupation threshold, for any participating EU country, and see exactly how far your offer is above or below the line. Free, no signup, sources cited.
- [Germany Opportunity Card (Chancenkarte) Points Calculator](https://induwara.lk/tools/germany-opportunity-card-points-calculator) — Score the German Opportunity Card (Chancenkarte) points system, qualification recognition, work experience, German and English level, age, prior residence and partner potential, against the 6-point threshold and the three basic requirements, with a full per-criterion breakdown.
- [Hong Kong QMAS Points Test Calculator](https://induwara.lk/tools/hong-kong-qmas-points-calculator) — Check whether you clear Hong Kong's enhanced Quality Migrant Admission Scheme (QMAS) General Points Test: answer 12 yes/no criteria across 6 aspects, confirm the four prerequisites, and see if you meet the official 6-out-of-12 pass mark. Free, no signup, sources cited.
- [Japan Highly Skilled Professional (HSP) Points Calculator](https://induwara.lk/tools/japan-highly-skilled-professional-points-calculator) — Score yourself against Japan's official Highly Skilled Professional points table, categories (i)(a) academic research, (i)(b) specialized/technical and (i)(c) business management, across education, career, income, age, research and bonus items, against the 70-point recognition bar and the 80-point 1-year PR fast-track. Free, no signup, ISA source cited.
- [Japan Specified Skilled Worker (SSW / Tokutei Ginou) Eligibility Checker](https://induwara.lk/tools/japan-specified-skilled-worker-eligibility-checker) — Check if you qualify for Japan's Specified Skilled Worker (SSW / Tokutei Ginou) work visa. Pick your industry field, age, Japanese-language status and skills-test result to see SSW(i) eligibility, exactly what's missing, and whether the SSW(ii) long-term pathway (no stay limit, family allowed) exists in your field. No degree required, sources cited.
- [New Zealand Skilled Migrant Category Points Calculator](https://induwara.lk/tools/new-zealand-skilled-migrant-points-calculator) — Check whether you clear New Zealand's 6-point Skilled Migrant Category threshold, claim your highest of qualification, occupational registration or income, add NZ skilled work experience, and see the age and accredited-employer job-offer gates, from Immigration NZ's official points table.
- [Schengen 90/180-Day Visa Calculator](https://induwara.lk/tools/schengen-90-180-day-calculator) — Track how many of your 90 permitted Schengen-area days remain in any rolling 180-day window, with day-by-day compliance and forward-planning for your next entry. Free, client-side, sources cited.
- [South Korea F-2-7 Points-Based Residency Visa Calculator](https://induwara.lk/tools/south-korea-f2-7-points-calculator) — Score yourself against South Korea's official F-2-7 points-based residence visa table, age, education, Korean (TOPIK/KIIP) and NTS income as essential items, plus bonus and deduction items, against the 80-point pass mark, and see the cheapest way to close the gap. Free, no signup, sources cited.
- [Sri Lanka → Japan Work Visa Route Checker (TITP, SSW, ESI)](https://induwara.lk/tools/sri-lanka-japan-work-visa-route-checker) — Find out which of the three official routes to a Japanese work visa — TITP, SSW or ESI — is open to you from Sri Lanka today, exactly which requirement each one is missing, and what the remaining exams cost in rupees. Built on SLBFE’s own Japan programme portal: which SSW skills tests are sat in Colombo, in which language, at which published LKR fee, plus the cheapest and the fastest way to clear the Japanese-language requirement.
- [Sri Lanka Airport Parking & Lobby Fee Calculator (BIA Katunayake)](https://induwara.lk/tools/sri-lanka-airport-parking-fee-calculator) — Work out exactly what Bandaranaike International Airport charges for a stay — all seven AASL car parks, every published vehicle row and hour band, plus the Rs 500 per-person lobby entry and Rs 300 page-in board. Compares all seven parks side by side. Sources cited.
- [Sri Lanka Airport Tax & Departure Levy Calculator (2026)](https://induwara.lk/tools/sri-lanka-airport-tax-calculator) — Calculate Embarkation Levy + Passenger Service Charge for departures from Sri Lanka. Per-passenger breakdown, USD/LKR conversion, SAARC rates, exemptions, and AASL sources.
- [Sri Lanka Airport Taxi Fare Calculator (BIA Katunayake)](https://induwara.lk/tools/sri-lanka-airport-taxi-fare-calculator) — The official AASL fixed air-conditioned taxi fare from Bandaranaike International Airport to all 442 published destinations, with the Rs 130 per extra kilometre and Rs 300 per extra drop rules, the counter code to quote, and what the two official airport buses would cost the same party. Sources cited.
- [Sri Lanka Beach Finder — Mullaitivu Beach to Mirissa](https://induwara.lk/tools/sri-lanka-beach-finder) — Pick any of 51 named Sri Lankan beaches and any month to see whether the sea is calm, mixed or rough, the monsoon reason why, the rainfall normal for the nearest coastal station, and the road route from the nearest town. Built on the Department of Meteorology season calendar and WMO/NOAA 1991–2020 normals.
- [Sri Lanka Botanical Garden Ticket Price Calculator (Peradeniya, Hakgala, Gampaha)](https://induwara.lk/tools/sri-lanka-botanical-garden-ticket-price-calculator) — Price a whole party's entry to any of the six Sri Lankan botanical gardens — Peradeniya, Hakgala, Henarathgoda (Gampaha), Seetawaka, Mirijjawila and Ganewatta — at the correct local adult, child, school-child or senior rate, or the foreign adult, student or child rate. Shows why a foreigner pays LKR 3,540 at a gate the gazette prices at Rs 3,000, and which rate each age falls into. Every foreign figure read from the Department of National Botanic Gardens' own pages.
- [Sri Lanka Bus Fare Calculator (NTC price list 2026)](https://induwara.lk/tools/sri-lanka-bus-fare-calculator) — The NTC bus fares in force from 6 July 2026: the complete inter-provincial price list, all 439 routes in normal, semi-luxury and AC luxury class, plus the 26 route-flat expressway service fares. Every figure quoted from NTC's own tables, nothing estimated.
- [Sri Lanka Bus Route Number Finder (NTC inter-provincial routes)](https://induwara.lk/tools/sri-lanka-bus-route-number-finder) — Search every gazetted inter-provincial bus route in Sri Lanka by town pair or route number. Shows both terminals and which classes, Normal, Semi-Luxury, AC, Super-Luxury, are licensed.
- [Sri Lanka Cultural Triangle & Heritage Site Entry Fee Calculator 2026](https://induwara.lk/tools/sri-lanka-cultural-triangle-entry-fee-calculator) — Work out the gate cost for Sigiriya, Polonnaruwa, Anuradhapura, Dambulla and the rest of Sri Lanka's CCF heritage sites. Compares per-site total against the Cultural Triangle Round Ticket and picks the cheaper option. Sources cited.
- [Sri Lanka Customs Baggage Allowance Calculator (BIA, 2026)](https://induwara.lk/tools/sri-lanka-customs-baggage-allowance-calculator) — Find your duty-free concession at Bandaranaike International Airport and estimate the customs duty, VAT, PAL and CESS on excess baggage. Gold, foreign currency and electronics limits, all in one place, sources cited, no signup.
- [Sri Lanka Driving Licence Class Eligibility Checker](https://induwara.lk/tools/sri-lanka-driving-license-class-eligibility-checker) — Find out which of Sri Lanka's 13 driving licence classes you can apply for, based on your age, classes already held, holding-period rules and NTMI medical. DMT rules cited.
- [Sri Lanka Driving Licence Fee Calculator (DMT 2026)](https://induwara.lk/tools/sri-lanka-driving-license-fee-calculator) — Every DMT driving licence levy in Sri Lanka, normal and same-day service: new licence, adding classes, renewal, duplicate, foreign conversion. Schedule I, cited line by line.
- [Sri Lanka Driving Licence Medical Certificate (NTMI) Fee & Centre Finder](https://induwara.lk/tools/sri-lanka-driving-license-medical-fee-finder) — What the National Transport Medical Institute charges for the medical fitness certificate your driving licence step needs, whether you meet its age, holding-period and height rules, what to carry, and which of the 26 NTMI offices serves your district — every fee transcribed from ntmi.lk, with the row it came from.
- [Sri Lanka Driving Licence Written Exam Practice Test](https://induwara.lk/tools/sri-lanka-driving-license-written-exam-practice) — A free, timed practice run of the Department of Motor Traffic written examination: 154 questions on Sri Lankan road signs, road markings, police hand signals and Motor Traffic Act rules, scored against the 75% pass mark with a per-topic breakdown of what to revise. Every answer carries its statutory or Highway Code citation. Unofficial practice material, no signup.
- [Sri Lanka Driving License Validity Calculator (DMT 2026)](https://induwara.lk/tools/sri-lanka-driving-license-validity-calculator) — Find the exact expiry date of your Sri Lankan driving licence by class, issue date, and age, with renewal-window and Form D medical-certificate flags. Free, no signup, DMT sources cited.
- [Sri Lanka Drone Registration & Permit Fee Calculator](https://induwara.lk/tools/sri-lanka-drone-registration-fee-calculator) — Find your CAASL weight category, whether registration and third-party insurance are required, and the drone flight-approval fee in rupees, scaled by how many locations you want to fly. Free, no signup, sources cited.
- [Sri Lanka Dual Citizenship Fee Calculator (2026)](https://induwara.lk/tools/sri-lanka-dual-citizenship-fee-calculator) — Estimate the full Sri Lankan dual citizenship application cost in LKR and USD, principal, spouse, children, replacement, cancellation, using the Immigration Department fee schedule.
- [Sri Lanka Embassy & Consulate Finder](https://induwara.lk/tools/sri-lanka-embassy-consulate-finder) — Find the Sri Lankan embassy, high commission or consulate that covers the country you are in, including the mission that is concurrently accredited when there is no resident one, with its address, telephone, email, office hours and the consular services it performs. Also works in reverse for the foreign missions in Colombo.
- [Sri Lanka ETA Visa Fee Calculator (Tourist, Business, Transit)](https://induwara.lk/tools/sri-lanka-eta-visa-fee-calculator) — Work out the exact Sri Lanka ETA visa cost in USD and LKR, tourist, business, transit, broken down into government fee, gateway fee, on-arrival surcharge. Sources cited.
- [Sri Lanka EV Charging Cost Calculator (CEB Tariff)](https://induwara.lk/tools/sri-lanka-ev-charging-cost-calculator) — Work out the monthly LKR cost of charging an EV at home in Sri Lanka on the CEB D-1 or D-TOU tariff, and compare it against petrol/diesel at today's CPC price.
- [Sri Lanka Expressway Toll Calculator (E01, E02, E04, Port Access)](https://induwara.lk/tools/sri-lanka-expressway-toll-calculator) — Calculate the exact RDA-gazetted toll for any trip on Sri Lanka's expressway network, Southern (E01), Outer Circular (E02), Central Phase 1 (E04) and the Port Access Elevated Highway. Per vehicle class, with round-trip totals. Sources cited.
- [Sri Lanka Foreign Driving Licence Checker](https://induwara.lk/tools/sri-lanka-foreign-driving-license-checker) — Tells you which of the three official routes applies to your foreign licence: a permanent conversion, a temporary licence, or neither. Pick the issuing country, your citizenship and how long you are staying, and get the gazetted levy, the maximum validity and the document checklist for that route. Read off DMT circular 2022/14, paragraph by paragraph.
- [Sri Lanka Fuel Cost Calculator (Petrol & Diesel Trip Cost)](https://induwara.lk/tools/sri-lanka-fuel-cost-calculator) — Calculate the petrol or diesel cost of any trip in Sri Lanka using the latest Ceylon Petroleum Corporation retail prices. Free, no signup, sources cited.
- [Sri Lanka Fuel Efficiency Calculator (km/l, Mileage & Cost per km)](https://induwara.lk/tools/sri-lanka-fuel-efficiency-calculator) — Work out your vehicle's real fuel economy from fill-up data in km/l, L/100km and mpg, then price it as cost per km and a monthly fuel budget using the latest CPC prices. Free, no signup, sources cited.
- [Sri Lanka Highway Bus Timetable (NTC expressway times)](https://induwara.lk/tools/sri-lanka-highway-bus-timetable) — The actual departure times NTC prints for Southern Expressway buses, Matara, Galle, Tangalle, Ambalangoda and Elpitiya to Makumbura, Kadawatha, Kaduwela and Colombo. Next buses, first and last bus of the day, and a separate column for Friday, Saturday, Sunday and Monday where NTC publishes one.
- [Sri Lanka Highway Entrance Finder, Nearest Expressway Interchange](https://induwara.lk/tools/sri-lanka-highway-entrance-finder) — Pick your town or district and see which expressway interchange is your entrance, the expressway and km post, the A/B road it is joined from, the towns it officially serves, its neighbouring exits, and the road distance where the RDA table has it. Toll preview per vehicle class, straight from the gazetted schedule.
- [Sri Lanka Inter-Provincial Bus Timetable (Normal Road)](https://induwara.lk/tools/sri-lanka-interprovincial-bus-timetable) — The departure, stop and arrival times NTC prints for normal-road inter-provincial buses, Colombo to Kandy, Anuradhapura, Kurunegala, Kegalle, Gampola and Balangoda, plus Kandy to Kurunegala and Kegalle. Next buses from any time you ask about, first and last bus of the day, Normal, Semi-Luxury and Luxury classes where the sheet prints them.
- [Sri Lanka International Driving Permit (IDP) Fee Calculator](https://induwara.lk/tools/sri-lanka-international-driving-permit-fee-calculator) — Find the AA Ceylon cost of an International Driving Permit, whether it is recognised in your destination country (1949 Geneva vs 1968 Vienna), its 1-year validity, and the exact documents you need. Free, no signup, sources cited.
- [Sri Lanka Korea EPS-TOPIK Eligibility & Point Checker](https://induwara.lk/tools/sri-lanka-korea-eps-topik-eligibility-checker) — Check whether you may sit Sri Lanka's Special EPS-TOPIK examination for South Korea, the exact SLBFE date-of-birth window, prior E-9/E-10 service, deportation and travel-ban history, colour vision, then score yourself out of 200 on Korea's point-based selection system from your EPS-TOPIK mark, Skills Test and Job Capacity Assessment documents.
- [Sri Lanka Lotus Tower Ticket Price Calculator](https://induwara.lk/tools/sri-lanka-lotus-tower-ticket-price-calculator) — Price a whole party's visit to the Colombo Lotus Tower (Nelum Kuluna) at the official portal rates — Observation Deck Rs 500, Pixel Bloom Rs 350, Combo Rs 850 for Sri Lankans, USD 20 for foreign visitors — with the 3–10 child band, the under-3 exemption and the NIC / driving-licence rule applied. Settles what the portal leaves open: the Combo saves locals nothing, and is a free upgrade for foreign visitors.
- [Sri Lanka Mobile Phone Import Tax Calculator (2026)](https://induwara.lk/tools/sri-lanka-mobile-phone-import-tax-calculator) — Estimate the all-in landed cost of importing a phone to Sri Lanka, Customs Duty, Cess, PAL, VAT, SSCL and TRCSL MDRS IMEI fee. Free, sources cited.
- [Sri Lanka Motor Traffic (DMT) Office Finder](https://induwara.lk/tools/sri-lanka-motor-traffic-office-finder) — Which Department of Motor Traffic office serves your district, its address and telephone number, and whether the job you need, a new or renewed driving licence, a first registration, an ownership transfer, can actually be finished there or has to go to Werahera or the Narahenpita head office. All 25 districts, transcribed from dmt.gov.lk.
- [Sri Lanka Museum Entrance Fee Calculator (Colombo, Kandy, Galle and 8 more)](https://induwara.lk/tools/sri-lanka-museum-entrance-fee-calculator) — Price a whole party’s admission to any of the eleven museums run by the Department of National Museums — Colombo National, Natural History, the Dutch Museum, Independence Memorial, Kandy, Rathnapura, Galle, the Galle Maritime Museum, Anuradhapura Folk, Magampura Ruhunu and the Polonnaruwa Ancient Technology Museum. Local and foreign adult, child, school-student and teacher rates, the published parking and video-permit charges, a check of whether the Department’s combined Colombo ticket beats two single ones, and whether your date is a day the museum is shut. Every figure from the Department’s own fee schedule.
- [Sri Lanka National Park Entry Fee Calculator (Yala, Wilpattu, Udawalawe)](https://induwara.lk/tools/sri-lanka-national-park-entry-fee-calculator) — Work out the all-in gate cost for Sri Lanka's national parks, per-person, vehicle, service, tracker and VAT, for Sri Lankan, SAARC and other foreign visitors. Sources cited.
- [Sri Lanka Number Plate Year Checker — Find a Vehicle's Registration Year](https://induwara.lk/tools/sri-lanka-number-plate-year-checker) — Estimate a Sri Lankan vehicle's registration year, province, and class from its number plate, covering the current 3-letter (CAB-1234), older province (WP GA-5678), and numeric series, and see how to check the DMT ongoing vehicle registration number. Sources cited.
- [Sri Lanka Ongoing Vehicle Registration Number Tracker, DMT Current Number](https://induwara.lk/tools/sri-lanka-ongoing-vehicle-registration-number) — Find the ongoing vehicle registration number the Department of Motor Traffic is issuing, and count exactly how many registrations sit between your number plate and it, plus roughly how long that gap represents.
- [Sri Lanka Parcel Import Duty Calculator (Customs Charges)](https://induwara.lk/tools/sri-lanka-parcel-import-duty-calculator) — Estimate Sri Lanka Customs Duty, Cess, PAL, Surcharge, VAT and SSCL on parcels from Amazon, AliExpress, eBay, Temu or any overseas retailer. Free, sources cited.
- [Sri Lanka Pet Import Checker — Dogs & Cats (2026 Rules)](https://induwara.lk/tools/sri-lanka-pet-import-permit-checker) — Works backwards from your flight date to every deadline the Department of Animal Production & Health sets for bringing a dog or cat into Sri Lanka under its rules effective 1 January 2026 — the microchip gate, the 1.5-month age rule, the dam-vaccination rule for animals under three months, the dogs-only Leishmaniasis and heartworm blood tests, the two-week application cut-off, the health certificate and parasite windows, the real fees (the permit is free), and the day home quarantine ends.
- [Sri Lanka Railway Parcel Charge Calculator](https://induwara.lk/tools/sri-lanka-railway-parcel-charge-calculator) — Work out what Sri Lanka Railways charges to send a parcel between any two stations, straight from the department’s published distance × weight grid — the ordinary rate, the 3× Mail / Intercity / Express rate, the value charge on insured categories, and the multipliers for furniture, chicks and light bulky articles. Plus the §11 counter procedure: the form, the 50 kg cap, the documents and the way bill the receiver needs.
- [Sri Lanka Railway Retiring Room & Holiday Bungalow Charges](https://induwara.lk/tools/sri-lanka-railway-retiring-room-bungalow-charges) — What a night in Sri Lankan government railway accommodation actually costs: all 34 published retiring-room charges across 10 stations, plus the two railway holiday bungalow rates for Nuwara Eliya and Kataragama. Prices your stay, checks your party against the published sleeping capacity, and tells you where to apply. Every rate traced to its PDF.
- [Sri Lanka Railway Station Finder — Contact Numbers & List](https://induwara.lk/tools/sri-lanka-railway-station-finder) — Every Sri Lanka Railways station: its telephone number as a one-tap call, its line, its rail distance from Colombo Fort, and the stations either side of it. All nine lines browsable as one searchable list. Transcribed from SLR's own Station Details table, sources cited.
- [Sri Lanka Residence Visa Fee Calculator](https://induwara.lk/tools/sri-lanka-residence-visa-fee-calculator) — Work out the total Sri Lanka residence visa fee for any category, employment, investor, student, dependent, foreign spouse of a citizen, My Dream Home or the 2026 Digital Nomad category, across your chosen years and family members, using the official Department of Immigration & Emigration per-annum rates.
- [Sri Lanka Road Distance Calculator (Town to Town km)](https://induwara.lk/tools/sri-lanka-road-distance-calculator) — Find the road distance and estimated drive time between any two major Sri Lankan towns. Compares the shortest toll-free route with the fastest expressway route using the RDA inter-city distance schedule, then links the distance into our fuel, bus, train and toll calculators.
- [Sri Lanka Road Signs Finder — Shapes, Colours and Meanings](https://induwara.lk/tools/sri-lanka-road-signs-finder) — Identify any Sri Lankan road sign from what you can actually see — its shape, its colour and the symbol inside it — and get the official meaning in English and Sinhala, the rule it enforces, the Motor Traffic Act section and the spot fine for ignoring it. Searchable by name in either language. Transcribed from the RDA Manual on Traffic Control Devices and the Highway Code; every fine is read live from the gazetted schedule.
- [Sri Lanka Speed Limit Finder](https://induwara.lk/tools/sri-lanka-speed-limit-finder) — Find the legal speed limit in Sri Lanka for your vehicle and road type, expressway, open road or town area. Covers cars, motorcycles, three-wheelers, vans, buses and lorries, with an over-the-limit check. Based on Gazette 1763/26 and RDA expressway rules. Free, no signup.
- [Sri Lanka Three-Wheeler (Tuk-Tuk) Fare Calculator](https://induwara.lk/tools/sri-lanka-three-wheeler-fare-calculator) — Calculate the gazetted legal maximum three-wheeler fare in Sri Lanka, flag-down, per-km, waiting time, optional night surcharge, with a per-km sanity check for any quote.
- [Sri Lanka Tourist SIM Card Price Comparison 2026 (Dialog, Mobitel, Airtel)](https://induwara.lk/tools/sri-lanka-tourist-sim-comparison) — Enter your trip length and the data you expect to use, and see what every published Sri Lankan tourist SIM and eSIM plan actually costs for the whole trip, re-activations included. Dialog, SLT-Mobitel and Airtel pay-as-you-go on one basis, with every price linked to the operator page it came from.
- [Sri Lanka Tourist VAT Refund Calculator](https://induwara.lk/tools/sri-lanka-tourist-vat-refund-calculator) — Estimate the cash VAT refund a tourist can claim at Colombo airport under Sri Lanka's Tourist VAT Refund Scheme (TVRS). Enter your eligible purchases to get the 18% refund, check the Rs 50,000 minimum, and confirm eligibility. Free, no signup, IRD sources cited.
- [Sri Lanka Traffic Fines List & Spot Fine Calculator 2026](https://induwara.lk/tools/sri-lanka-traffic-fine-calculator) — Look up the Sri Lanka spot fine for any traffic offence, licence, insurance, helmet, seatbelt, mobile phone, speeding. Sourced from the 2022 gazette, with Motor Traffic Act citations.
- [Sri Lanka Train Fare Calculator (SLR 2026, 1st / 2nd / 3rd Class)](https://induwara.lk/tools/sri-lanka-train-fare-calculator) — The ticket price Sri Lanka Railways publishes for any route in 1st, 2nd and 3rd class, with the rail distance, group and return totals. Reserved seats are priced separately by SLR. Sources cited.
- [Sri Lanka Train Timetable & Schedule Finder](https://induwara.lk/tools/sri-lanka-train-timetable) — Pick two Sri Lanka Railways stations and see the direct long-distance trains between them, departure and arrival times, journey duration, train type, available classes, days of operation and the published SLR ticket price. Sorted by departure, with a live 'next departure' countdown and a fare deep-link. Sources cited.
- [Sri Lanka Travel Foreign Currency Allowance Checker](https://induwara.lk/tools/sri-lanka-travel-currency-allowance-checker) — Check how much foreign currency cash, travel-card funds and Sri Lankan rupee notes you can legally carry out of or into Sri Lanka, against the CBSL USD 5,000 / 10,000 and Customs USD 15,000 and LKR 20,000 limits, and whether a Customs declaration is required.
- [Sri Lanka Trip Planner — Free Day-by-Day Itineraries (Maps, Stops, Tips)](https://induwara.lk/tools/trip-planner) — Hand-curated Sri Lanka itineraries with day-by-day stops, interactive maps, real budget ranges, and local tips. Kandy, Galle, Ella and more, no signup, no app.
- [Sri Lanka Vehicle Emission Test Fee Calculator (2026)](https://induwara.lk/tools/sri-lanka-vehicle-emission-test-fee-calculator) — Find the exact VET fee for your vehicle class, motorcycle, car, van, lorry, bus, or prime mover. Retest rules, EV exemption, certificate validity, sources cited.
- [Sri Lanka Vehicle First Registration Fee Calculator (DMT)](https://induwara.lk/tools/sri-lanka-vehicle-first-registration-fee-calculator) — Calculate the DMT first-registration fee, number plate, smart-card CR, and late-registration penalty for any motor vehicle, motorcycle, three-wheeler, lorry, bus, or trailer in Sri Lanka. Free, no signup, gazette cited.
- [Sri Lanka Vehicle Import Tax Calculator (CIF → Landed Cost)](https://induwara.lk/tools/sri-lanka-vehicle-import-tax-calculator) — Estimate the landed cost of importing a car, SUV or van to Sri Lanka. Customs Duty, Excise, PAL, SSCL and VAT broken down line by line for petrol, diesel, hybrid and electric vehicles. Sources cited, no signup.
- [Sri Lanka Vehicle Number Plate Decoder — DMT Codes](https://induwara.lk/tools/sri-lanka-vehicle-number-plate-decoder) — Decode any Sri Lankan number plate into its province, vehicle class (car, van, three-wheeler, bus, lorry), and approximate registration era, using the Department of Motor Traffic's published format spec. Free, instant, runs in your browser.
- [Sri Lanka Vehicle Ownership Transfer Fee Calculator (2026)](https://induwara.lk/tools/sri-lanka-vehicle-ownership-transfer-fee-calculator) — Work out the exact DMT bill when buying a used car, motorbike, tuk or lorry in Sri Lanka, class fee, service charge, 1% stamp duty and the 14-day late penalty, line by line. Sources cited, no signup.
- [Sri Lanka Visa Extension Fee Calculator (Tourist & Residence)](https://induwara.lk/tools/sri-lanka-visa-extension-fee-calculator) — Estimate the USD and LKR cost of extending a Sri Lankan tourist, business or residence visa, itemised from the Department of Immigration's official fee schedule.
- [Sri Lanka Visa Overstay Penalty Calculator](https://induwara.lk/tools/sri-lanka-visa-overstay-penalty-calculator) — Work out exactly what you owe the Sri Lanka Department of Immigration for overstaying your visa or ETA: the gazetted US$0 / US$250 / US$500 penalty tiers plus the applicable base visa fee, shown in USD with an indicative LKR total and each line linked to its source.
- [Sri Lanka Visa Requirement Checker (by Nationality)](https://induwara.lk/tools/sri-lanka-visa-requirement-checker) — Do you need a visa for Sri Lanka? Pick your passport country and trip purpose to see the ETA category (visa-exempt, SAARC, or standard), the exact fee in USD and LKR, max stay, entries, and extension path. Free, sources cited.
- [Sri Lanka Visa-Free Countries Finder (2026, SL Passport)](https://induwara.lk/tools/sri-lanka-visa-free-countries-finder) — Look up every country a Sri Lankan ordinary passport holder can enter visa-free, on visa-on-arrival, eVisa, or eTA, with fees, allowed stay, and the official immigration source for each.
- [Sri Lanka Weather by Month (Best Time to Visit Each Region)](https://induwara.lk/tools/sri-lanka-weather-by-month) — Pick any Sri Lankan region and month to see the long-term average rainfall, rain days and temperature, plus a plain dry/shoulder/wet verdict and which coast is driest right now. Built on Department of Meteorology / WMO 1991–2020 climate normals.
- [Sri Lanka Zoo & Safari Park Entry Fee Calculator (Dehiwala, Pinnawala, Ridiyagama)](https://induwara.lk/tools/sri-lanka-zoo-entry-fee-calculator) — Price a whole group's entry to Dehiwala Zoo, the Pinnawala Elephant Orphanage, Pinnawala Open Zoo or Ridiyagama Safari Park at the correct local, SAARC or other-foreign rate — with the 20-child school group rate, the elephant feeding, river bathing and buggy cart prices, and a check of whether the combined Pinnawala ticket beats two single ones. Every figure read from the Department of National Zoological Gardens' own facility pages.
- [UAE Golden Visa Eligibility Checker](https://induwara.lk/tools/uae-golden-visa-eligibility-checker) — Check whether you qualify for the UAE 10-year Golden Visa and through which route, property, public investment, entrepreneur, skilled professional or outstanding student, against the official u.ae AED thresholds. Instant per-route verdict, visa term, shortfall and document checklist. Free, no signup.
- [UK Skilled Worker Visa Points Calculator](https://induwara.lk/tools/uk-skilled-worker-visa-points-calculator) — Check whether your job offer scores the 70 points needed for a UK Skilled Worker visa under the Home Office rules from 22 July 2025. Points breakdown by characteristic, plus the salary cash-floor and going-rate tests. No signup, sources cited.
- [US Green Card Lottery (DV) Eligibility Checker for Sri Lankans](https://induwara.lk/tools/sri-lanka-us-green-card-lottery-eligibility-checker) — Check whether you qualify for the US Diversity Visa (green card lottery) from Sri Lanka, country of birth, O/L vs A/L education, and work-experience rules, then get the free official entry link. No signup, no fee, State Dept sources cited.
- [Visa Fee Calculator for Sri Lankans (UK, US, Schengen, Canada, Australia)](https://induwara.lk/tools/visa-fee-calculator-for-sri-lankans) — What a visa really costs a Sri Lankan passport holder in rupees, the UK, US, Schengen, Canadian and Australian consular fee, biometrics, the Colombo centre service fee and premium options, for one traveller or a whole family. Every figure read from the government's own fee schedule.

### Education (88)

- [Adam Optimizer Calculator — step-by-step update rule](https://induwara.lk/tools/ai-adam-optimizer-calculator) — Compute one or more steps of the Adam optimizer from a gradient and the standard hyperparameters, biased and bias-corrected first/second moments, the effective step size, and the updated parameter, with a plain-SGD comparison and a multi-step θ trajectory. Runs entirely in your browser.
- [AI Student Discounts & Free Plans Checker](https://induwara.lk/tools/ai-student-discount-checker) — Pick the AI tools you want, GitHub Copilot, Google AI Pro, Perplexity, JetBrains, Cursor, ChatGPT, Canva, Notion, and instantly see which are free or discounted for students, whether the offer reaches Sri Lanka, how to verify eligibility, and your total yearly saving in USD and LKR.
- [Australia Student Visa (Subclass 500) Financial Requirement Calculator](https://induwara.lk/tools/australia-student-visa-financial-requirement-calculator) — Work out the exact funds you must prove for an Australian Subclass 500 student visa, 12-month living costs, tuition, partner and school costs, with the income-pathway alternative and an LKR view.
- [Binomial Distribution Calculator — P(X=k), CDF, mean & SD](https://induwara.lk/tools/binomial-distribution-calculator) — Compute the exact binomial probability P(X=k) plus every cumulative form (at most, at least, less than, more than, between) for n trials at success probability p, with the mean np, variance np(1−p), standard deviation and mode, a labelled PMF bar chart, and the formula worked out on your own numbers. Log-space evaluation stays exact to n = 100,000.
- [Cambridge & Edexcel Exam Fee Calculator (Sri Lanka)](https://induwara.lk/tools/sri-lanka-cambridge-edexcel-exam-fee-calculator) — Total the British Council Sri Lanka exam fee for the Cambridge or Pearson Edexcel subjects and IAL units you plan to sit, with what late registration adds per subject and which deadline window you are in today.
- [Chi-Square Test Calculator (Goodness of Fit & Independence)](https://induwara.lk/tools/chi-square-test-calculator) — Run Pearson's chi-square test in your browser, goodness-of-fit or test of independence. Get the χ² statistic, degrees of freedom, exact p-value, critical value, expected-count matrix and a plain-English verdict, with full working.
- [Citation & Referencing Generator (APA, MLA, IEEE, Harvard, Chicago)](https://induwara.lk/tools/citation-generator) — Generate correctly formatted references and matching in-text citations in APA 7th, MLA 9th, IEEE, Harvard and Chicago. Build a full reference list in your browser, no signup, no ads.
- [Cohen's d Effect Size Calculator (with Hedges' g)](https://induwara.lk/tools/cohens-d-effect-size-calculator) — Compute Cohen's d and the bias-corrected Hedges' g from means and SDs, raw data, or a t value, for independent, paired, or one-sample designs. Returns the 95% CI, overlap, and a small/medium/large verdict with full working shown.
- [Confidence Interval Calculator (Mean & Proportion)](https://induwara.lk/tools/confidence-interval-calculator) — Calculate the confidence interval and margin of error for a sample mean (z or t) or proportion (Wilson/Wald) at any confidence level, with the working shown.
- [Cramér's V Calculator — Chi-Square Effect Size](https://induwara.lk/tools/cramers-v-calculator) — Compute Cramér's V, the effect size for association between two nominal variables, from a contingency table or a chi-square value. Reports χ², df, φ², bias-corrected V (Bergsma) and a strength verdict, all in your browser.
- [Cronbach's Alpha Calculator (reliability & alpha if deleted)](https://induwara.lk/tools/cronbachs-alpha-calculator) — Compute Cronbach's alpha internal-consistency reliability from a respondents × items score grid, with per-item mean, variance, corrected item-total correlation, and alpha if item deleted. Runs entirely in your browser, no upload.
- [Descriptive Statistics Calculator (Mean, Median, SD)](https://induwara.lk/tools/descriptive-statistics-calculator) — Paste a list of numbers to instantly compute mean, median, mode, range, variance, standard deviation, quartiles and IQR, with a sample-vs-population toggle and step-by-step working.
- [English Test Score Converter (IELTS, TOEFL, PTE, CEFR, Duolingo)](https://induwara.lk/tools/english-test-score-converter) — Convert a score on one English proficiency test into its official equivalents on the others, IELTS, TOEFL iBT, PTE Academic, Duolingo English Test and CEFR, using each provider's own concordance table, shown as ranges with sources cited.
- [Final Grade Calculator — grade needed on your final exam](https://induwara.lk/tools/final-grade-calculator) — Find the exact mark you need on a final exam to hit a target course grade, or compute your overall weighted grade from assignments and exams. Free, in-browser, no signup.
- [Fisher's Exact Test Calculator (2×2 Contingency Table)](https://induwara.lk/tools/fisher-exact-test-calculator) — Run Fisher's exact test on a 2×2 table in your browser. Enter the four cell counts to get the exact two-sided and one-sided hypergeometric p-values, the sample odds ratio and relative risk, and a plain-English verdict, the small-sample alternative to chi-square. No signup, sources cited.
- [Foreign Scholarship Eligibility Checker for Sri Lankan Students](https://induwara.lk/tools/sri-lanka-foreign-scholarship-eligibility-checker) — Check, programme by programme, which government-channelled foreign scholarships you qualify for as a Sri Lankan — Japanese MEXT undergraduate and research, Indian ICCR under the Nehru Memorial and Rajiv Gandhi schemes, the Chinese Government undergraduate, master’s and PhD awards, Stipendium Hungaricum, and Chevening. Every age gate, A/L sitting, degree class and English grade is transcribed from the Ministry’s own notices, and each card shows the exact rule that blocks you plus the shortest change that would flip it.
- [Gini Coefficient & Lorenz Curve Calculator](https://induwara.lk/tools/gini-coefficient-calculator) — Compute the Gini coefficient and Gini index of any income, wealth, or value distribution, from a raw list of numbers or grouped decile/quintile shares, and draw the Lorenz curve, with the full step-by-step working, Palma and quintile ratios, and a World Bank country comparison. Runs entirely in your browser.
- [IELTS Band Score Calculator — Overall Band (Official Rule)](https://induwara.lk/tools/ielts-band-score-calculator) — Calculate your IELTS overall band from the four section scores using the official averaging-and-rounding rule, with the exact maths shown. Optional indicative raw-score (out of 40) conversion for Listening and Reading, Academic and General Training.
- [IELTS to CLB Calculator (Canada Express Entry Language Score)](https://induwara.lk/tools/ielts-to-clb-calculator) — Convert IELTS General Training, CELPIP or PTE Core scores into Canadian Language Benchmark (CLB) levels and the CRS language points they earn, using IRCC's official equivalency charts.
- [Intraclass Correlation Coefficient (ICC) Calculator](https://induwara.lk/tools/intraclass-correlation-calculator) — Compute all six Shrout & Fleiss ICC forms from a subjects × raters grid, one-way, two-way random (absolute agreement) and two-way mixed (consistency), single and average measures, with the full ANOVA table, a Koo & Li reliability verdict, and a ready-to-paste methods sentence. Runs entirely in your browser.
- [JLPT Score & Pass Calculator (N5–N1)](https://induwara.lk/tools/jlpt-score-calculator) — Add up your JLPT section scores, get your total out of 180, and check whether you passed, including every sectional pass mark for N5, N4, N3, N2 and N1. Catches the case where a high total still fails because one section fell below its minimum. Free, no signup, sources cited.
- [Kolmogorov–Smirnov (K-S) Test Calculator](https://induwara.lk/tools/kolmogorov-smirnov-test-calculator) — Run one-sample and two-sample Kolmogorov–Smirnov tests from raw numbers: the D statistic, the point of maximum separation, the asymptotic p-value, critical values at α = 0.10 / 0.05 / 0.01, an ECDF chart and a plain-English verdict. Runs in your browser, no signup.
- [Kruskal-Wallis H Test Calculator](https://induwara.lk/tools/kruskal-wallis-test-calculator) — Run the Kruskal-Wallis H test online on 2+ groups: pooled ranks, tie-corrected H statistic, degrees of freedom, and a chi-square p-value, in-browser with every step shown. The non-parametric alternative to one-way ANOVA and the 3+-group extension of the Mann-Whitney U test.
- [Mann-Whitney U Test Calculator (with steps)](https://induwara.lk/tools/mann-whitney-u-test-calculator) — Run the Mann-Whitney U test (Wilcoxon rank-sum) on two independent samples from raw numbers. Returns U₁, U₂ and U, the exact or tie-corrected normal-approximation p-value, rank-biserial effect size and CLES, with every ranking step shown. Runs in your browser, no signup.
- [Normal Distribution Calculator (Z-Score & Probability)](https://induwara.lk/tools/normal-distribution-calculator) — Find normal-distribution probabilities, percentiles, z-scores and p-values for any mean and standard deviation, left, right, two-tailed, between two values, or inverse, with the bell curve and working shown.
- [One-Way ANOVA Calculator — F-statistic, p-value & table](https://induwara.lk/tools/one-way-anova-calculator) — Compare the means of three or more groups from raw data and get a full one-way ANOVA table, sum of squares, degrees of freedom, mean squares, the F-statistic, and an exact p-value, with a plain-English verdict and effect size (η², ω²), computed entirely in your browser.
- [Open University Sri Lanka Course Finder & Eligibility Checker](https://induwara.lk/tools/open-university-sri-lanka-course-finder) — Enter your O/L results, A/L stream and anything else you hold, and see which of the 158 Open University of Sri Lanka programmes you can actually apply for — certificate, advanced certificate, diploma, degree and postgraduate. Each row carries the published entry rule, duration, course fee, application fee and closing date, cited to the programme page. Where you fall short, it names the blocking rule and the OUSL bridging course that clears it.
- [Permutation and Combination Calculator (nPr, nCr)](https://induwara.lk/tools/permutation-combination-calculator) — Compute permutations (nPr) and combinations (nCr) for any whole numbers, with or without repetition. Exact BigInt results, the factorial formula expanded with your numbers, step-by-step working, and all four standard cases compared at a glance.
- [Poisson Distribution Calculator — P(X=k), CDF, mean & variance](https://induwara.lk/tools/poisson-distribution-calculator) — Compute the exact Poisson probability P(X=k) plus every cumulative form (at most, at least, less than, more than, between) for an average rate λ, with the mean λ, variance λ, standard deviation √λ and mode, a labelled PMF bar chart, and the formula worked out on your own numbers. Log-space evaluation stays exact to λ = 100,000.
- [R-Squared & Adjusted R-Squared Calculator](https://induwara.lk/tools/r-squared-calculator) — Compute R² (coefficient of determination) and adjusted R² by fitting a linear regression to x/y data or comparing actual vs predicted values. Shows the full SST, SSR and SSE breakdown, the fitted line and a residual table, NIST formulas, entirely in your browser.
- [Resistor Color Code Calculator (4, 5 & 6 Band)](https://induwara.lk/tools/resistor-color-code-calculator) — Decode 4-, 5-, and 6-band resistor color bands into resistance, tolerance, and temperature coefficient (and reverse) using the IEC 60062 standard.
- [Sample Size Calculator (Cochran's Formula)](https://induwara.lk/tools/sample-size-calculator) — Find the minimum survey or research sample size for any confidence level, margin of error, expected proportion, and population. Uses Cochran's formula with the finite-population correction, shows the working, and gives a methodology sentence you can cite.
- [SAT ⇄ ACT Score Converter (Official Concordance)](https://induwara.lk/tools/sat-act-score-converter) — Convert an SAT total (400–1600) to its equivalent ACT composite (1–36) and back, using the official 2018 College Board & ACT concordance. Shows the concordance band, an approximate percentile for both scores, and the full lookup table. Free, no signup.
- [SLIATE HND Course Finder & Eligibility Checker (ATI Admissions)](https://induwara.lk/tools/sri-lanka-sliate-hnd-eligibility-checker) — Enter your A/L stream, three subject grades and O/L results, and see every SLIATE Higher National Diploma you can apply for at Sri Lanka's 19 Advanced Technological Institutes — with the exact published requirement behind each yes and each no, your selection mark out of 100 under the five Category II marking schemes, and which ATI near you runs it. Transcribed from the official SLIATE gazette notice and admission guideline.
- [SLMC Recognised Medical & Dental School Checker](https://induwara.lk/tools/slmc-recognised-medical-school-checker) — Check whether a foreign medical or dental school is on the Sri Lanka Medical Council's recognised list, the exact recognition window, how many days of it are left today, and whether it still runs when you are due to graduate. All 25 medical and 12 dental programmes, transcribed from the SLMC's own published list with each verbatim status string kept alongside.
- [Sri Lanka A/L & O/L Grade Calculator (Marks to Grade)](https://induwara.lk/tools/sri-lanka-exam-grade-calculator) — Convert G.C.E. Advanced Level or Ordinary Level subject marks (0–100) into official Sri Lankan letter grades, A, B, C, S, W/F, with a grade distribution, pass count, distinctions tally, and an optional 4-point GPA.
- [Sri Lanka A/L Aptitude Test Score Calculator (UGC Aggregate)](https://induwara.lk/tools/sri-lanka-aptitude-test-score-calculator) — Compute your UGC aggregate mark from your A/L Z-score and aptitude test mark for Architecture, Design, IT, Fine Arts and Surveying Sciences. Free, sources cited.
- [Sri Lanka A/L Repeat University Eligibility Checker](https://induwara.lk/tools/sri-lanka-al-repeat-eligibility-checker) — Re-sitting the GCE A/L? Answer a few questions and get a clear eligible / not-eligible verdict for UGC state-university admission, the 3-sitting limit, the same-sitting rule, prior-enrolment bar, and the myth that repeaters face a Z-score penalty. Free, sources cited.
- [Sri Lanka A/L Stream Eligibility Checker](https://induwara.lk/tools/sri-lanka-al-stream-eligibility-checker) — Enter your O/L grades to check if you qualify to sit GCE A/L and which streams, Physical Science, Biological Science, Commerce, Arts, Technology, your results open. Handles the Maths-fail Arts-only rule. Sources cited.
- [Sri Lanka A/L Subject Combination Validator (UGC streams)](https://induwara.lk/tools/sri-lanka-al-subject-combination-validator) — Pick any three A/L subjects and see which UGC stream the combination unlocks for state-university admission, Bio, Maths, Eng Tech, Bio-systems Tech, Commerce or Arts. Sources cited.
- [Sri Lanka A/L Z-Score Calculator](https://induwara.lk/tools/sri-lanka-al-z-score-calculator) — Compute your Sri Lankan G.C.E. Advanced Level Z-score from three subject raw marks using the official UGC formula, with per-subject breakdown and an indicative percentile band.
- [Sri Lanka ACCA & CIMA Qualification Cost Calculator](https://induwara.lk/tools/sri-lanka-acca-cima-cost-calculator) — Add up the total official ACCA or CIMA body fees to qualify in Sri Lanka, registration, subscription, exemption and exam-entry fees, itemised in GBP and LKR with an ACCA-vs-CIMA comparison. Tuition excluded, sources cited.
- [Sri Lanka Accountancy Qualification Cost Calculator (CA & AAT)](https://induwara.lk/tools/sri-lanka-accountancy-qualification-cost-calculator) — Add up the total official body fees to qualify as an accountant in Sri Lanka, CA Sri Lanka (ICASL) or AAT Sri Lanka. Sums student registration, per-level exam fees, re-sits and annual subscriptions, with an itemised breakdown and an AAT-vs-CA side-by-side comparison. Official institute fees only, sources cited, no signup.
- [Sri Lanka Degree Class Predictor (Honours Classification)](https://induwara.lk/tools/sri-lanka-degree-class-predictor) — Map your cumulative GPA or average to a Sri Lankan honours class, First, Second Upper, Second Lower or General, and find the average you need over remaining credits to climb a class.
- [Sri Lanka English Exam Fee Comparator (IELTS, TOEFL, PTE, DET)](https://induwara.lk/tools/sri-lanka-english-proficiency-exam-fee-comparator) — Compare 2026 LKR fees for IELTS, TOEFL iBT, PTE Academic, Duolingo English Test, and Cambridge in Sri Lanka. Filter by purpose (study abroad, UK visa, Canada PR) and rank by price.
- [Sri Lanka Exam Time Table 2026 — O/L, A/L & Grade 5 Scholarship](https://induwara.lk/tools/sri-lanka-exam-timetable) — Official Department of Examinations dates for Sri Lanka's G.C.E. O/L, G.C.E. A/L and Grade 5 Scholarship examinations. Tick the subjects you are offering for a paper-by-paper schedule, a countdown to your next paper, your clear revision days, a same-session clash warning and a calendar (.ics) export. Free, no signup.
- [Sri Lanka Examination Fees Calculator (DoE 2026)](https://induwara.lk/tools/sri-lanka-examination-fees-calculator) — Work out the official Department of Examinations fee for O/L and A/L re-correction, certified copies, duplicate result sheets, and overseas authentication, sourced from the latest DoE circulars.
- [Sri Lanka External Degree Finder](https://induwara.lk/tools/sri-lanka-external-degree-finder) — Enter your A/L result, O/L passes and preferred field, and see every state-university external degree in Sri Lanka you can actually register for — UCSC, University of Colombo and Sri Jayewardenepura. Each card quotes the published entry clause you satisfy, the fee schedule line by line, the maximum duration of study and the official application page. Miss a requirement and it names the exact clause that blocks you and the shortest published route past it.
- [Sri Lanka GCE O/L Pass & A/L Eligibility Calculator](https://induwara.lk/tools/sri-lanka-ol-exam-pass-calculator) — Enter your nine GCE O/L grades and instantly see whether you passed O/L, qualified for A/L, and how many credits and distinctions you earned. Sources cited.
- [Sri Lanka Government Exam Calendar 2026](https://induwara.lk/tools/sri-lanka-government-exam-calendar) — Every 2026 public-service examination the Department of Examinations has scheduled — Efficiency Bar, Open and Limited Competitive, promotion — with sitting dates, weekdays, venues and a countdown. Searchable, with the official monthly PDF linked.
- [Sri Lanka Grade 1 Admission Age Calculator (MoE Rule)](https://induwara.lk/tools/sri-lanka-grade-1-admission-age-calculator) — Enter your child's date of birth and instantly see which year they're eligible for Grade 1 in a Sri Lankan government school under the Ministry of Education's 5-year / 31 January rule. No signup, sources cited.
- [Sri Lanka Grade 1 School Admission Marks Calculator](https://induwara.lk/tools/sri-lanka-grade-1-school-admission-marks-calculator) — Estimate the marks your Grade 1 government school application will score under the Ministry of Education circular. All five admission categories, with breakdown and document checklist.
- [Sri Lanka Grade 2–11 School Admission Marks Calculator](https://induwara.lk/tools/sri-lanka-grade-2-to-11-school-admission-marks-calculator) — Scores a government school transfer application for Grades 2–4 (out of 50) or Grades 7–11 (out of 100) under Ministry of Education Circular 09/2026. Checks the eligibility category’s own test, awards the distance, academic, achievement and leadership marks, lists the documents to post, and says plainly which marks the circular does not publish a split for instead of inventing one.
- [Sri Lanka Grade 5 Scholarship Cut-Off Marks Checker](https://induwara.lk/tools/sri-lanka-grade-5-scholarship-cutoff-marks) — Check whether a Grade 5 Scholarship mark clears your district's official cut-off, by year and medium, and see which national schools it would have qualified for. Department of Examinations figures, no signup, sources cited.
- [Sri Lanka Hotel School Course and Fee Finder (SLITHM)](https://induwara.lk/tools/sri-lanka-hotel-school-course-finder) — Enter your age, qualification, trade and nearest college, and see which SLITHM programmes you qualify for, what each one costs in registration, monthly and examination fees, and which of the nine provincial colleges teaches it. Every figure is quoted from the hotel school's own course pages.
- [Sri Lanka Interest-Free Student Loan (IFSLS) Calculator](https://induwara.lk/tools/sri-lanka-interest-free-student-loan-calculator) — Work out your monthly repayment, total repayment and timeline under Sri Lanka's government Interest-Free Student Loan Scheme (IFSLS) for an approved non-state degree. Because the Treasury pays the interest you repay principal only, the tool also runs a self-declared eligibility check and shows the illustrative government subsidy.
- [Sri Lanka KDU Course Fee & Intake Eligibility Checker](https://induwara.lk/tools/sri-lanka-kdu-course-fee-eligibility-checker) — Every KDU Intake 44 day-scholar course fee, total, per academic year and the application fee for however many programmes you apply for, next to a gate-by-gate check of whether you clear the Officer Cadet route's age band, marital status, Common General Test mark and O/L English pass, each one quoted from the KDU notice it comes from.
- [Sri Lanka Law College Entrance Exam Eligibility Checker](https://induwara.lk/tools/sri-lanka-law-college-entrance-exam-checker) — Check whether you meet the Sri Lanka Law College entrance rules, citizenship, the 17-year age bar, two A/L credits at one sitting, O/L English and Sinhala or Tamil, with every rule quoted from the official notice.
- [Sri Lanka Mahapola Scholarship Calculator (Merit & Bursary)](https://induwara.lk/tools/sri-lanka-mahapola-scholarship-calculator) — Check Mahapola Merit and Bursary eligibility, the current monthly stipend, and total payout across your degree. Free, no signup, mahapola.lk and UGC sources cited.
- [Sri Lanka National College of Education (NCoE / Vidyapeeta) Eligibility Checker](https://induwara.lk/tools/sri-lanka-ncoe-eligibility-checker) — Check every Ministry of Education rule for the three-year National Diploma in Teaching at Sri Lanka's 19 National Colleges of Education, the age bar as at the gazette's own date, the one-sitting A/L rule, the O/L baseline, and which of the 49 courses your subjects open.
- [Sri Lanka National Schools List & Finder](https://induwara.lk/tools/sri-lanka-national-school-finder) — Search all 396 national schools in Sri Lanka by name, province, district or education zone. Census number, address and zone for every school, transcribed from the Ministry of Education list and cross-checked against the Annual School Census. No signup, sources cited.
- [Sri Lanka NDT Eligibility Checker (ITUM Moratuwa Admission)](https://induwara.lk/tools/sri-lanka-ndt-eligibility-checker) — Enter your A/L sitting year, three subject grades, date of birth and O/L English result, and see whether you can apply for the National Diploma in Technology at the Institute of Technology, University of Moratuwa — Set 1 (Maritime Studies), Set 2 (the eight engineering and technology fields), both, or neither. Every yes and every no carries the gazette clause behind it, plus the application fee your case actually costs and the closing date. Transcribed from ITUM's 2026/2027 gazette notification.
- [Sri Lanka New School Curriculum Checker (2026 Education Reforms)](https://induwara.lk/tools/sri-lanka-new-school-curriculum-checker) — The 2026 reforms started in Grades 1 and 6 only. Enter your child's grade and school year to see the exact year they move to the new syllabus, and whether they sit the present or new O/L and A/L.
- [Sri Lanka Nursing Training Eligibility Checker](https://induwara.lk/tools/sri-lanka-nursing-training-eligibility-checker) — Check whether you meet every published criterion of the Ministry of Health's student nursing training recruitment, age, A/L batch year and stream, the four O/L credit passes, sittings, height, marital status and citizenship, with each rule quoted from the gazette it comes from.
- [Sri Lanka NVQ Level & Equivalence Lookup (TVEC Framework)](https://induwara.lk/tools/sri-lanka-nvq-qualification-level-lookup) — Find your NVQ level, its academic equivalent (O/L, A/L, Diploma, Degree), the jobs it qualifies you for, and next-step pathways in Sri Lanka's TVEC NVQ framework. Free, no signup, sources cited.
- [Sri Lanka O/L Grade Calculator & A/L Eligibility Checker](https://induwara.lk/tools/sri-lanka-ol-grade-calculator) — Convert GCE O/L marks into official A/B/C/S/W grades, count credit passes, and check GCE A/L stream eligibility per Department of Examinations and Ministry of Education rules.
- [Sri Lanka O/L Subject Selection Checker](https://induwara.lk/tools/sri-lanka-ol-subject-selection-checker) — Every G.C.E. O/L subject in the three official categories, plus a checker that says whether your nine-subject Grade 10 selection is allowed and which rule it breaks. Sources cited.
- [Sri Lanka Paramedical Training Course Eligibility Checker](https://induwara.lk/tools/sri-lanka-paramedical-training-eligibility-checker) — Enter your O/L and A/L grades, age, sex and height and see which of the eight Ministry of Health para medical training courses you qualify for, from Public Health Inspector to Dispenser, with the gazette clause that decides each one quoted beside it.
- [Sri Lanka Postgraduate Course Fee Comparison (MBA, MSc, PGD)](https://induwara.lk/tools/sri-lanka-postgraduate-course-fee-comparison) — Compare the published fee of a taught postgraduate programme — MBA, MSc, MA, Master's or postgraduate diploma — across Sri Lanka's postgraduate institutes and graduate faculties, itemised the way each institute itemises it, and turned into the instalment and per-month figure a working professional actually budgets on. Every rupee is transcribed from the institute's own page, with the link and the date it was read.
- [Sri Lanka Private University Fee Comparison — Degree Costs at Recognised Non-State Institutes](https://induwara.lk/tools/sri-lanka-private-university-fee-comparison) — Pick a field of study and your entry qualification, and see every recognised non-state degree with its full published cost — tuition year by year, the one-off registration and library fees, and a foundation year where your result requires one — as one grand total, a per-year figure and the per-month figure a family actually budgets with. Every fee links to the institute page it was read from, and the programmes whose cost the institute does not publish are named rather than estimated.
- [Sri Lanka Required GPA Calculator](https://induwara.lk/tools/sri-lanka-required-gpa-calculator) — Find the exact GPA you need on your remaining university credits to graduate with a First Class, Second Upper, Second Lower or a custom target CGPA. Runs your GPA maths in reverse on the UGC 4.00 scale, flags targets already secured or out of reach. Free, no signup, sources cited.
- [Sri Lanka School Term Calendar & Days Counter 2026](https://induwara.lk/tools/sri-lanka-school-term-calendar) — Official Ministry of Education 2026 school term dates for Sri Lankan government schools. Count school days, see public-holiday closures, and download a .ics calendar, free, no signup.
- [Sri Lanka SLQF Level Checker](https://induwara.lk/tools/sri-lanka-slqf-level-checker) — Look up the official SLQF level (1–12) of any Sri Lankan qualification, Certificate, Diploma, Bachelors, Honours, Masters, MPhil or PhD. See the minimum credits, typical duration, comparable NVQ level, and whether it meets a vacancy's 'SLQF Level X or above' requirement. Based on the SLQF 2016 framework, sources cited.
- [Sri Lanka Teachers' Service Efficiency Bar Exam Checker](https://induwara.lk/tools/sri-lanka-teacher-efficiency-bar-exam-checker) — Tells a Sri Lankan government teacher which Efficiency Bar examination their grade requires, the date the Teachers' Service Minute gives them to pass it, and whether the 7 September 2026 concessions exempt them — with the gazette behind every rule.
- [Sri Lanka UGC Approved Degree Checker (Section 25A & State Universities)](https://induwara.lk/tools/sri-lanka-ugc-approved-degree-checker) — Check whether a Sri Lankan campus, institute or university can award a recognised degree — the legal route (state university, Section 25A Order, or its own Act of Parliament), the Ministry recognition date to quote on an application form, the exact degree titles it may award, and whether a UGC equivalence certificate is needed. Built from the Ministry of Education and UGC recognition lists.
- [Sri Lanka University Attendance Calculator](https://induwara.lk/tools/sri-lanka-attendance-calculator) — Work out your class-attendance percentage and see exactly how many lectures you can still skip, or must attend, to stay above the 80% minimum most Sri Lankan universities require to sit end-of-semester exams. Free, instant, no signup.
- [Sri Lanka University Bursary Calculator](https://induwara.lk/tools/sri-lanka-university-bursary-calculator) — Check if you qualify for the UGC university bursary in Sri Lanka and estimate the annual payout. Applies the official Commission Circular 04/2025 income ceiling, concessions and Rs 6,500/month rate. Free, no signup, sources cited.
- [Sri Lanka University Course Eligibility Checker (A/L Subject Requirements)](https://induwara.lk/tools/sri-lanka-university-course-eligibility-checker) — Enter your three A/L subjects, grades and Common General Paper mark and see every UGC state-university course code you are allowed to apply for, plus the courses you miss by a single grade, each with the handbook's own requirement sentence quoted.
- [Sri Lanka University Cut-Off Marks Finder (UGC Z-Score)](https://induwara.lk/tools/sri-lanka-university-cutoff-finder) — Enter your A/L Z-score, stream and district to see which Sri Lankan state-university courses you would have cleared. Official 2025/2026 UGC cut-offs, district + EDD quotas, sources cited.
- [Sri Lanka University District Quota Calculator](https://induwara.lk/tools/sri-lanka-university-district-quota-calculator) — See how any Sri Lankan state-university course intake is split under the UGC 40% merit / 55% district-basis / 5% educationally-disadvantaged-district rule, with an exact seat count for every one of the 25 districts. Cites the UGC handbook, no signup.
- [Sri Lanka Vocational Course Finder (NVQ courses after O/L)](https://induwara.lk/tools/sri-lanka-vocational-course-finder) — Finished O/L? See which NVQ courses you can enrol in right now at VTA, NAITA, a Technical College or SLIATE, with the NVQ level, course length, provider and the TVEC entry criterion you meet. Free, no signup, sources cited.
- [Sri Lanka Zonal Education Office Finder](https://induwara.lk/tools/sri-lanka-zonal-education-office-finder) — Find which of Sri Lanka's 100 zonal education offices covers your town or school, the divisional education offices under it, the provincial department above it, and its published telephone number, straight from the Ministry of Education's own lists.
- [Standard Deviation Calculator (with Variance, Mean, Median, Mode & Steps)](https://induwara.lk/tools/standard-deviation-calculator) — Paste a list of numbers and instantly get population and sample standard deviation, variance, mean, median, mode, range, and standard error, with the full step-by-step working (deviations, squared deviations, sum of squares) shown so you can reproduce every number by hand.
- [Statistical Power Calculator (t-test & two proportions)](https://induwara.lk/tools/statistical-power-calculator) — Compute the statistical power (1 − β) of a two-group study, two means (Cohen's d) or two proportions (Cohen's h), plus the required sample size and the minimum detectable effect. Shows every formula and z-value, runs in your browser.
- [T-Test Calculator (One-Sample, Paired & Two-Sample)](https://induwara.lk/tools/t-test-calculator) — Run a Student's t-test from raw data, one-sample, paired, or independent two-sample (pooled or Welch). Returns the t-statistic, degrees of freedom, p-value, confidence interval, and verdict with full working shown.
- [UK Student Visa Maintenance Funds Calculator](https://induwara.lk/tools/uk-student-visa-maintenance-funds-calculator) — Calculates the exact bank balance a Sri Lankan must hold for a UK Student visa, 9 months of Home Office living costs plus one year's tuition, minus deposits, in GBP and LKR, with the 28-day holding rule flagged.
- [Wilcoxon Signed-Rank Test Calculator (with steps)](https://induwara.lk/tools/wilcoxon-signed-rank-test-calculator) — Run the Wilcoxon signed-rank test on paired samples (before/after) or one sample against a median. Returns W⁺, W⁻ and W = min(W⁺, W⁻), the exact or tie-corrected normal-approximation p-value, the rank-biserial effect size, and the full ranking worktable. Runs in your browser, no signup.
- [Z-Test Calculator (One-Sample, Two-Sample & Proportions)](https://induwara.lk/tools/z-test-calculator) — Run a z-test from summary statistics, one-sample mean, two-sample means, one-proportion, or two-proportion. Returns the z-statistic, one- or two-tailed p-value, critical value and decision at your chosen α, a confidence interval, and full working. Runs in your browser, no signup.

### Health (58)

- [A1C to Average Blood Glucose Calculator](https://induwara.lk/tools/a1c-calculator) — Convert HbA1c to estimated average blood glucose in mg/dL and mmol/L (and back) using the ADA's ADAG formula, with an A1c⇄eAG reference chart and ADA normal/prediabetes/diabetes range check. Runs entirely in your browser.
- [Anion Gap Calculator (Albumin-Corrected + Delta Ratio)](https://induwara.lk/tools/anion-gap-calculator) — Compute the serum anion gap from sodium, chloride and bicarbonate, correct it for albumin, classify high vs normal against the reference range, and, when the gap is elevated, get the delta ratio (delta-delta) to screen for mixed acid-base disorders. Instant, in-browser, sources cited, educational use only.
- [APGAR Score Calculator (Newborn, 1 & 5 Minute)](https://induwara.lk/tools/apgar-score-calculator) — Score a newborn's condition with the five APGAR signs, Appearance, Pulse, Grimace, Activity, Respiration, each 0–2, for the 1- and 5-minute totals. Get the condition band, a per-sign breakdown, and guidance on continued scoring. Free, runs entirely in your browser.
- [Bishop Score Calculator (Modified, for Induction)](https://induwara.lk/tools/bishop-score-calculator) — Score cervical readiness before induction of labour with the five Modified Bishop findings, dilation, effacement, fetal station, consistency and position, for the 0–13 total, its favourable/unfavourable band, and a per-finding breakdown. Free, runs entirely in your browser.
- [Bland-Altman Limits of Agreement Calculator](https://induwara.lk/tools/bland-altman-calculator) — Paste two columns of paired measurements to get the Bland-Altman method-comparison analysis: the bias (mean difference), the 95% limits of agreement, confidence intervals for both, and the difference-vs-mean plot. Runs entirely in your browser.
- [Blood Pressure Category Checker (ACC/AHA + WHO)](https://induwara.lk/tools/blood-pressure-category-checker) — Classify a systolic/diastolic reading into the correct blood-pressure category under both the ACC/AHA 2017 and WHO/ESC-ESH standards, with mean arterial pressure and pulse pressure. Free, no signup, sources cited.
- [Blood Sugar Converter (mg/dL ⇄ mmol/L) & Level Chart](https://induwara.lk/tools/blood-sugar-converter) — Convert a blood glucose reading between mg/dL and mmol/L and classify it against the ADA/WHO fasting, OGTT, and random diabetes ranges, Normal, Prediabetes, or Diabetes, with a full level chart in both units. Runs entirely in your browser.
- [Blood Type Compatibility & Inheritance Calculator](https://induwara.lk/tools/blood-type-compatibility-calculator) — Predict a child's possible blood types from both parents (ABO + Rh Mendelian genetics), and check exactly who can donate red cells or plasma to you and receive from you using the American Red Cross chart. Free, no signup, runs entirely in your browser.
- [Body Surface Area (BSA) Calculator](https://induwara.lk/tools/body-surface-area-calculator) — Calculate body surface area in m² from height and weight using all five published formulas, Mosteller, Du Bois, Haycock, Gehan-George and Boyd, and convert a mg/m² drug dose into a patient dose. Free, no signup, sources cited.
- [Calories Burned Calculator (by Activity, MET-Based)](https://induwara.lk/tools/calories-burned-calculator) — Estimate how many calories you burn walking, running, cycling, swimming, the gym, cricket, or 90+ activities from your body weight and duration, using published MET values. Includes a steps-to-calories mode. Runs in your browser, sources cited.
- [Can I Donate Blood in Sri Lanka? Eligibility Checker (NBTS 2026)](https://induwara.lk/tools/sri-lanka-blood-donation-eligibility-checker) — Find out instantly whether you can donate blood in Sri Lanka. Free NBTS-aligned eligibility checker covering age, weight, hemoglobin, inter-donation interval, tattoos, vaccines and travel.
- [Centor / McIsaac Score Calculator (Strep Throat)](https://induwara.lk/tools/centor-mcisaac-score-calculator) — Calculate the modified Centor (McIsaac) score for a sore throat from age and four clinical signs. Get the strep (GAS) probability and the guideline-aligned test/treat recommendation. Shows the classic Centor score too. Free, no signup, sources cited.
- [CHA2DS2-VASc Score Calculator (Stroke Risk in Atrial Fibrillation)](https://induwara.lk/tools/cha2ds2-vasc-score-calculator) — Calculate the CHA2DS2-VASc score to estimate annual stroke risk in non-valvular atrial fibrillation. Tick eight clinical risk factors to get the score (0–9), the adjusted annual stroke/thromboembolism rate, a per-factor breakdown and the 2020 ESC anticoagulation recommendation, entirely in your browser.
- [Child Height Predictor — how tall will my child be?](https://induwara.lk/tools/child-height-predictor) — Predict a child's adult height from the parents' heights (mid-parental method) plus an optional WHO growth-trajectory estimate from the child's current age and height. Shows the expected range in cm and ft/in. Free, no signup, sources cited.
- [Child-Pugh Score Calculator — Class A/B/C](https://induwara.lk/tools/child-pugh-score-calculator) — Compute the Child-Pugh (Child-Turcotte-Pugh) score for chronic liver disease from bilirubin, albumin, INR, ascites and encephalopathy. Get the 5–15 points, the A/B/C class, and class-level survival and surgery-risk estimates. Conventional and SI units, sources cited, no signup.
- [Creatinine Clearance Calculator (Cockcroft-Gault)](https://induwara.lk/tools/creatinine-clearance-calculator) — Estimate creatinine clearance (CrCl, mL/min) with the Cockcroft-Gault equation from age, sex, weight and serum creatinine. Accepts mg/dL and µmol/L, shows the FDA renal dose-adjustment band, and lets you verify the substituted formula by hand.
- [CURB-65 Pneumonia Severity Score Calculator](https://induwara.lk/tools/curb-65-score-calculator) — Score community-acquired pneumonia severity with CURB-65 from five bedside findings, Confusion, Urea, Respiratory rate, Blood pressure and Age ≥ 65. Get the 0–5 score, 30-day mortality band, recommended care setting and the blood-test-free CRB-65 readout. Free, no signup, sources cited.
- [Daily Protein Intake Calculator](https://induwara.lk/tools/protein-intake-calculator) — Work out how many grams of protein to eat per day from your body weight, age, life stage and activity level. Anchored to the IOM/WHO RDA and layered with the ISSN evidence-based ranges for active people, with a per-meal split and common Sri Lankan protein foods to reach the target.
- [Diabetes Risk Calculator (FINDRISC Type 2 Risk Score)](https://induwara.lk/tools/diabetes-risk-calculator) — Estimate your 10-year risk of type 2 diabetes from eight no-blood-test questions using the validated FINDRISC score, get a 0–26 score, a risk band, a plain '≈1 in N' likelihood and a South-Asian waist note. Runs entirely in your browser, no signup.
- [Diagnostic Test Statistics Calculator (Sensitivity, Specificity, PPV, NPV, Likelihood Ratios)](https://induwara.lk/tools/diagnostic-test-statistics-calculator) — Enter a 2×2 diagnostic test table (or type sensitivity + specificity directly) and get sensitivity, specificity, PPV, NPV, positive/negative likelihood ratios, diagnostic odds ratio, accuracy and Youden's J, each with its formula and a 95% Wilson confidence interval. Re-projects PPV/NPV and post-test probability onto any disease prevalence. Runs entirely in your browser.
- [Edinburgh Postnatal Depression Scale (EPDS) Test](https://induwara.lk/tools/epds-postnatal-depression-test) — Take the 10-question Edinburgh Postnatal Depression Scale (EPDS) online. Score your mood over the past week (0–30), get a plain-language likelihood band, and see an automatic self-harm safety flag plus Sri Lankan helplines. Runs entirely in your browser, no answers leave the page.
- [eGFR (Kidney Function) Calculator](https://induwara.lk/tools/egfr-calculator) — Estimate kidney function (eGFR) from serum creatinine, age and sex using the race-free CKD-EPI 2021 equation, with KDIGO CKD-stage interpretation.
- [Epworth Sleepiness Scale Calculator (ESS Daytime Sleepiness Test)](https://induwara.lk/tools/epworth-sleepiness-scale-calculator) — A free self-administered Epworth Sleepiness Scale test that sums your 0–3 ratings across 8 everyday situations and returns your 0–24 daytime-sleepiness score with its validated severity band. Runs entirely in your browser, no signup.
- [FIB-4 Index Calculator (Liver Fibrosis Score)](https://induwara.lk/tools/fib-4-index-calculator) — Calculate the FIB-4 (Fibrosis-4) Index from age, AST, ALT and platelet count to estimate the risk of advanced liver fibrosis (F3-F4). Applies the age-adjusted AGA 2021 cut-offs, shows the low / indeterminate / high band with a hand-checkable formula, and cites the Sterling 2006 source. Educational estimate, not a diagnosis.
- [GAD-7 Anxiety Screening Test](https://induwara.lk/tools/gad-7-anxiety-test) — Take the validated GAD-7 anxiety screening test online. Score the seven standard items (0–21), get your severity band, ≥10 screening flag, and GAD-2 sub-score, and see Sri Lankan support helplines if needed. Runs entirely in your browser, no answers leave the page.
- [Glasgow Coma Scale (GCS) Calculator](https://induwara.lk/tools/glasgow-coma-scale-calculator) — Score consciousness on the Glasgow Coma Scale from Eye, Verbal and Motor responses, get the total GCS (3–15), the E/V/M notation, the mild/moderate/severe band and the GCS ≤ 8 airway flag, with correct not-testable (NT) handling.
- [HAS-BLED Score Calculator (Bleeding Risk in Atrial Fibrillation)](https://induwara.lk/tools/has-bled-score-calculator) — Calculate the HAS-BLED score to estimate 1-year major-bleeding risk on oral anticoagulation in atrial fibrillation. Tick the nine clinical criteria for the score (0–9), the estimated bleeding rate per 100 patient-years, a low/high risk band and which factors are modifiable, the bleeding-risk companion to CHA2DS2-VASc, entirely in your browser.
- [HbA1c to Average Blood Glucose (eAG) Calculator](https://induwara.lk/tools/hba1c-to-average-blood-glucose-calculator) — Convert HbA1c (%) to estimated average blood glucose in mg/dL and mmol/L, and back, using the ADA/ADAG formula, with IFCC mmol/mol units and normal/prediabetes/diabetes interpretation. Free, no signup, sources cited.
- [Heart Rate Zone Calculator (Target HR & Training Zones)](https://induwara.lk/tools/heart-rate-zone-calculator) — Find your maximum heart rate and the five training zones in exact bpm, recovery, fat-burn, aerobic, threshold and VO₂ max. Add your resting HR for personalised Karvonen targets. Runs entirely in your browser.
- [HEART Score for Chest Pain Calculator (6-Week MACE Risk)](https://induwara.lk/tools/heart-score-calculator) — Calculate the HEART score to risk-stratify chest pain in the emergency department. Score History, ECG, Age, Risk factors and Troponin (0–10) to get the low/moderate/high risk band, the validated 6-week MACE risk and the guideline-aligned disposition, a per-component breakdown, entirely in your browser.
- [Ideal Body Weight (IBW) Calculator — Devine, Robinson, Miller, Hamwi](https://induwara.lk/tools/ideal-body-weight-calculator) — Work out ideal body weight from height and sex using the four clinical formulas (Devine, Robinson, Miller, Hamwi), see the WHO healthy weight range, and get adjusted body weight and percent-of-IBW for drug dosing. Runs in your browser, no signup.
- [IV Drip Rate Calculator — Drops Per Minute (gtt/min)](https://induwara.lk/tools/iv-drip-rate-calculator) — Calculate IV gravity infusion drip rate in drops per minute from fluid volume, time and drop factor, and convert between drops/min, mL/hr flow rate and infusion time. Free, no signup, sources cited.
- [LDL Cholesterol Calculator (Friedewald & Sampson-NIH)](https://induwara.lk/tools/ldl-cholesterol-calculator) — Calculate LDL ('bad') cholesterol from your lipid panel using the Friedewald and Sampson-NIH equations, plus non-HDL cholesterol and NCEP ATP III risk bands. Supports mg/dL and mmol/L, warns when Friedewald is unreliable. Free, no signup.
- [MELD 3.0 Score Calculator — End-Stage Liver Disease](https://induwara.lk/tools/meld-score-calculator) — Compute the MELD 3.0 score, the 2023 UNOS/OPTN liver-transplant allocation standard, from bilirubin, INR, creatinine, sodium, albumin, sex and dialysis. Get the 6–40 score, severity band, mortality reference and a term-by-term breakdown. Sources cited, no signup.
- [Metabolic Syndrome Risk Calculator (South Asian Cutoffs)](https://induwara.lk/tools/metabolic-syndrome-calculator) — Checks the 2009 Harmonized (IDF/NCEP) 3-of-5 criteria for metabolic syndrome using South Asian / Sri Lankan waist cut-offs (men 90 cm, women 80 cm). Enter five routine clinical values for an instant verdict, no signup, nothing leaves your browser.
- [NEWS2 (National Early Warning Score 2) Calculator](https://induwara.lk/tools/news2-early-warning-score-calculator) — Calculate the National Early Warning Score 2 (NEWS2) from seven bedside vitals, respiration, SpO₂, air/oxygen, systolic BP, pulse, consciousness and temperature. Get the aggregate score, red-score flag, clinical-risk band and RCP monitoring response. Free, no signup, RCP source cited.
- [NIH Stroke Scale (NIHSS) Calculator](https://induwara.lk/tools/nihss-stroke-scale-calculator) — Score the 15 standardised NIH Stroke Scale items to get the total (0–42), the severity band (no-stroke, minor, moderate, moderate-to-severe, severe), an auditable per-item breakdown and a copy-ready summary line. Correct untestable (UN) handling, sources cited.
- [Number Needed to Treat (NNT) Calculator](https://induwara.lk/tools/number-needed-to-treat-calculator) — Compute the number needed to treat (NNT) and number needed to harm (NNH) from a trial's control and treatment event rates, with absolute and relative risk reduction and an Altman 95% confidence interval, including the correct spans-infinity notation when the result is not significant. Working shown, sources cited.
- [Odds Ratio & Relative Risk Calculator](https://induwara.lk/tools/odds-ratio-relative-risk-calculator) — Compute the odds ratio, relative risk, ARR, RRR and number needed to treat or harm from a 2×2 study table, each with a 95% confidence interval (Woolf & Katz methods). Free, no signup, sources cited.
- [Ovulation Calculator — Fertile Window & Next Period](https://induwara.lk/tools/ovulation-calculator) — Predict your ovulation day, six-day fertile window, most-fertile days, next period dates, implantation window and due date from your last period and cycle length. Works for any cycle length, runs entirely in your browser.
- [Pack-Year Calculator — Smoking History & Lung-Cancer Screening Eligibility](https://induwara.lk/tools/pack-year-calculator) — Convert cigarettes per day and years smoked into pack-years, the standard clinical measure of lifetime tobacco exposure, across multiple periods, then check the total against the USPSTF lung-cancer screening threshold. Free, no signup, NCI and USPSTF sources cited.
- [PHQ-9 Depression Screening Test](https://induwara.lk/tools/phq-9-depression-test) — Take the validated PHQ-9 depression screening test online. Score the nine standard items (0–27), get your severity band and provisional depression screen, and see Sri Lankan crisis helplines if needed. Runs entirely in your browser, no answers leave the page.
- [QTc Calculator (Corrected QT Interval)](https://induwara.lk/tools/qtc-calculator) — Correct a measured QT interval for heart rate using all four standard formulas, Bazett, Fridericia, Framingham and Hodges, side by side, each flagged normal, borderline or prolonged for the patient's sex. Enter heart rate or RR interval; runs in your browser, sources cited.
- [SOFA Score Calculator (Sequential Organ Failure Assessment)](https://induwara.lk/tools/sofa-score-calculator) — Calculate the SOFA (Sequential Organ Failure Assessment) score from six organ systems, respiration, coagulation, liver, cardiovascular, CNS and renal. Get each 0–4 subscore, the 0–24 total with its published ICU-mortality band, and the Sepsis-3 acute-rise flag. Accepts mg/dL and µmol/L units. Free, no signup, sources cited.
- [Sri Lanka Blood Alcohol (BAC) & Drink-Driving Limit Calculator](https://induwara.lk/tools/sri-lanka-blood-alcohol-bac-calculator) — Estimate your blood alcohol concentration from drinks, weight and time using the Widmark formula, and compare it to Sri Lanka's 80 mg/100 ml legal drink-driving limit. Free, private, runs in your browser.
- [Sri Lanka BMI Calculator (Asian Cut-Offs)](https://induwara.lk/tools/sri-lanka-bmi-calculator) — Calculate your BMI and read it on both the Sri Lankan / Asian cut-offs (overweight from 23) and the WHO international scale, with your healthy weight range for your height. Free, no signup, runs in your browser.
- [Sri Lanka Cardiovascular (Heart Disease & Stroke) Risk Calculator](https://induwara.lk/tools/sri-lanka-cardiovascular-risk-calculator) — No-blood-test 10-year heart attack and stroke risk screen using the WHO/ISH SEAR-B chart that Sri Lanka's Healthy Lifestyle Centres use under the MoH PEN protocol. Enter age, sex, smoking, diabetes and blood pressure to get your colour-coded risk band and the recommended next step.
- [Sri Lanka Child Growth Chart Calculator (WHO + FHB CHDR)](https://induwara.lk/tools/sri-lanka-child-growth-chart-calculator) — Calculate WHO Z-scores and percentiles for weight-for-age, height-for-age, weight-for-height, and BMI-for-age. Matches the CHDR card your PHM uses. Free, private, no signup.
- [Sri Lanka Child Vaccination Schedule Calculator (EPI 2026)](https://induwara.lk/tools/sri-lanka-child-vaccination-schedule-calculator) — Generate your child's personalised Sri Lanka EPI vaccination schedule from date of birth, BCG to aTd, with exact due dates, overdue alerts, and a printable summary. Free, no signup, sources cited.
- [Sri Lanka Life Expectancy Calculator](https://induwara.lk/tools/sri-lanka-life-expectancy-calculator) — Estimate how many more years you can expect to live in Sri Lanka from your age and sex, using the official Department of Census and Statistics national life table, not the US/UK mortality data global calculators quietly apply. Shows remaining years, projected age at death, calendar year, and the male–female gap.
- [Sri Lanka Pregnancy Due Date & Antenatal Schedule Calculator](https://induwara.lk/tools/sri-lanka-pregnancy-due-date-calculator) — Calculate your due date (EDD), how many weeks pregnant you are in POA, your trimester, estimated conception date, and a dated Family Health Bureau / WHO 2016 antenatal clinic schedule from your last period and cycle length. Free, no signup, sources cited.
- [Sri Lankan Food Calorie Counter](https://induwara.lk/tools/sri-lanka-food-calorie-counter) — Count the calories and protein/carb/fat in Sri Lankan meals, rice & curry, kottu, string hoppers and more, from a database built on the MRI Sri Lanka Food Composition Tables.
- [STOP-BANG Score Calculator (Obstructive Sleep Apnea Risk)](https://induwara.lk/tools/stop-bang-score-calculator) — Score the validated 8-item STOP-BANG questionnaire and get your obstructive sleep apnea risk band. BMI, age, neck size and sex are scored automatically from your measurements. You answer only the four symptom questions. Runs entirely in your browser.
- [VO2 Max Calculator (Cooper, Rockport & Resting HR)](https://induwara.lk/tools/vo2-max-calculator) — Estimate your VO2 max, the best lab-free measure of aerobic fitness, from a 12-minute run, a 1-mile walk, or your resting heart rate. Returns maximal oxygen uptake in ml/kg/min, an age and sex fitness rating, and METs. Peer-reviewed formulas, runs in your browser, sources cited.
- [Waist-to-Height Ratio (WHtR) Calculator](https://induwara.lk/tools/waist-to-height-ratio-calculator) — Calculate your waist-to-height ratio (WHtR) and risk band using the NICE 'keep your waist to less than half your height' rule. Sex- and ethnicity-neutral, a better central-fat screen than BMI for South Asian body types. Free, sources cited.
- [Waist-to-Hip Ratio (WHR) Calculator](https://induwara.lk/tools/waist-to-hip-ratio-calculator) — Calculate your waist-to-hip ratio (WHR) and health-risk band using the WHO 0.90 (men) / 0.85 (women) cut-offs, and see whether your fat pattern is apple or pear shaped. Works in cm or inches, runs in your browser. Free, sources cited.
- [Wells Score for DVT Calculator](https://induwara.lk/tools/wells-score-dvt-calculator) — Score the 10 modified Wells criteria for suspected deep-vein thrombosis and get both the two-level (DVT likely/unlikely) and three-level (low/moderate/high) probability with the D-dimer versus ultrasound next step. Runs entirely in your browser, no data stored.
- [Wells Score for Pulmonary Embolism Calculator](https://induwara.lk/tools/wells-score-pulmonary-embolism-calculator) — Score the 7 Wells criteria for suspected pulmonary embolism and get both the three-tier (low/moderate/high) and two-tier (PE unlikely/likely) probability with the D-dimer versus CTPA next step. Runs entirely in your browser, no data stored.

### Documents (31)

- [Background Remover — Remove Image Background Free, In-Browser](https://induwara.lk/tools/background-remover) — Remove the background from any photo entirely in your browser. Runs the ISNet AI model via ONNX runtime, your image never leaves your device. Transparent PNG or WebP output, JPEG flatten on a colour you pick.
- [CSV to Excel Converter](https://induwara.lk/tools/csv-to-excel) — Convert any CSV (or TSV) file to .xlsx in your browser. Auto-detects comma, semicolon, tab, or pipe delimiters; infers number, date, and boolean columns; Sinhala and Tamil text round-trips cleanly. Files never leave your device.
- [EPUB to PDF Converter](https://induwara.lk/tools/epub-to-pdf) — Convert any EPUB e-book to a printable PDF entirely in your browser. The spine order, chapter titles, and inline images are preserved, files never leave your device, output text stays selectable.
- [Excel to PDF Converter](https://induwara.lk/tools/excel-to-pdf) — Inspect an Excel (.xlsx) workbook locally in your browser, classify it by size, and get routed to the best free, no-signup PDF converter for that file, privacy-first, sources cited.
- [Favicon Generator — Free, In-Browser, All Modern Sizes](https://induwara.lk/tools/favicon-generator) — Generate favicon.ico, every PNG size (16, 32, 48, 180, 192, 512), the Web App Manifest, and the HTML <link> snippet from one image, entirely in your browser. No upload, no signup, sources cited.
- [Free Resume / CV Builder — 5 templates, ATS score, PDF](https://induwara.lk/tools/resume-builder) — Build a clean, ATS-friendly resume in five template styles. Live ATS score, autosaved in your browser, downloadable A4 PDF. No signup, no upload.
- [GIF Maker — Animated GIF from Images, Free, In-Browser](https://induwara.lk/tools/gif-maker) — Stitch JPG, PNG, WebP, AVIF, or GIF frames into a single animated GIF entirely in your browser. Set frame delay, loop count, and output dimensions, files never leave your device, no signup, sources cited.
- [HTML to PDF Converter](https://induwara.lk/tools/html-to-pdf) — Convert any HTML snippet or full document to a PDF in your browser. Pick page size, orientation, and margin, files never leave your device, text stays selectable in the output.
- [Image Color Picker — HEX, RGB, HSL & CMYK from any photo](https://induwara.lk/tools/image-color-picker) — Pick any colour from a photo, screenshot, or design mockup and get HEX, decimal RGB, HSL, and CMYK in one click. Runs entirely in your browser, no upload, no signup.
- [Image Compressor — JPG, PNG, WebP](https://induwara.lk/tools/image-compressor) — Reduce JPG, PNG, and WebP file sizes by 50–90% entirely in your browser. Pick quality, resize, or convert format, files never leave your device, batch upload supported.
- [Image Cropper — Aspect Ratio Presets & Free-Form](https://induwara.lk/tools/image-cropper) — Crop JPG, PNG, and WebP images by aspect ratio (1:1, 4:3, 16:9, 9:16, golden) or free-form, entirely in your browser. Drag, nudge, or type exact coordinates, files never leave your device, no resampling.
- [Image Format Converter — JPG, PNG, WebP, AVIF, HEIC](https://induwara.lk/tools/image-format-converter) — Convert images between JPG, PNG, and WebP entirely in your browser, and decode AVIF or HEIC inputs without installing a thing. Batch supported, files never leave your device, sources cited.
- [Image Resizer — Pixels, Percent & Social Presets](https://induwara.lk/tools/image-resizer) — Resize JPG, PNG, and WebP images in your browser by exact pixels, percentage, longest-side cap, or a one-click social-media preset. Files never leave your device, aspect ratio is preserved, sources cited.
- [Image to ASCII Art — Free, In-Browser, No Upload](https://induwara.lk/tools/image-to-ascii) — Convert any image into ASCII art entirely in your browser. Four character ramps, monochrome or 24-bit color, adjustable brightness and contrast, files never leave your device, sources cited.
- [Image to Text (OCR) — Free, In-Browser](https://induwara.lk/tools/image-to-text-ocr) — Extract text from images, screenshots, and scans entirely in your browser. Tesseract LSTM with English, Sinhala, and Tamil. Files never leave your device, no signup, sources cited.
- [Image Upscaler — Enlarge Photos 2×, 3× or 4× in Your Browser](https://induwara.lk/tools/image-upscaler) — Enlarge JPG, PNG, and WebP images 2×, 3×, or 4× with bicubic resampling plus an unsharp-mask sharpening pass. Runs entirely in your browser, no upload, no signup.
- [JPG to PDF Converter](https://induwara.lk/tools/jpg-to-pdf) — Combine JPG, PNG, or WebP images into a single PDF entirely in your browser. Pick page size, orientation, and margin, reorder pages, and download, files never leave your device.
- [LaTeX CV Maker — build an ATS-friendly CV and get the .tex source](https://induwara.lk/tools/latex-cv-maker) — Fill in a form, pick a template, and get a real LaTeX-typeset CV as a PDF, plus the .tex source and fonts as a zip so you can keep editing it. Shows you the exact text an applicant tracking system reads back out of your PDF. Free, one CV a day without an account.
- [Markdown to PDF Converter](https://induwara.lk/tools/markdown-to-pdf) — Convert any Markdown, CommonMark or GitHub-Flavored, to a printable PDF entirely in your browser. GFM tables, code blocks, and images are preserved with selectable text. Files never leave your device.
- [Passport Photo Maker — 24 Country Specs, In-Browser](https://induwara.lk/tools/passport-photo-maker) — Resize and crop a portrait to the exact passport, visa, or ID-photo spec for 24 countries, Sri Lanka, US, UK, Schengen, India, and more. 300 DPI output, optional print sheet, files never leave your device.
- [PDF Compressor](https://induwara.lk/tools/pdf-compressor) — Reduce PDF file size entirely in your browser. Pick lossless, balanced, or strong compression, files never leave your device, text stays selectable, and metadata is stripped on demand.
- [PDF Merger](https://induwara.lk/tools/pdf-merger) — Combine multiple PDFs into one document entirely in your browser. Drag to reorder, preview each file, and download the merged result, files never leave your device.
- [PDF Page Rotator](https://induwara.lk/tools/pdf-page-rotator) — Rotate one page, a range, or every page of a PDF by 90°, 180°, or 270°, entirely in your browser. The page's /Rotate entry changes; the content stream stays byte-identical, so there is no quality loss.
- [PDF Password Remover](https://induwara.lk/tools/pdf-password-remover) — Strip the /Encrypt dictionary from a PDF you own entirely in your browser. Detects RC4 and AES variants, decodes which user-access restrictions are set, and rebuilds the file with no security handler, files never leave your device.
- [PDF Splitter](https://induwara.lk/tools/pdf-splitter) — Split a PDF into multiple files by page range, every N pages, or one PDF per page, entirely in your browser. Pages stay byte-identical to the source; files never leave your device.
- [PDF to JPG Converter](https://induwara.lk/tools/pdf-to-jpg) — Inspect a PDF locally in your browser, count its pages, and get routed to the best free, no-signup PDF-to-JPG converter for that exact file, privacy-first, sources cited.
- [PDF to Word Converter](https://induwara.lk/tools/pdf-to-word) — Inspect a PDF locally in your browser and get routed to the best free, no-signup converter for that exact file, privacy-first, sources cited.
- [PowerPoint to PDF Converter](https://induwara.lk/tools/powerpoint-to-pdf) — Inspect a PowerPoint (.pptx) deck locally in your browser, count slides, and get routed to the best free, no-signup PDF converter for that file, privacy-first, sources cited.
- [Video to GIF Converter — Free, In-Browser, No Upload](https://induwara.lk/tools/video-to-gif) — Convert MP4, WebM, or MOV clips into animated GIFs entirely in your browser. Pick start time, duration, fps, and size, files never leave your device, no signup, sources cited.
- [Watermark Adder — Add Text or Logo Watermark, Free, In-Browser](https://induwara.lk/tools/watermark-adder) — Stamp a copyright line, signature, or logo onto a JPG, PNG, or WebP photo entirely in your browser. Nine anchor positions, adjustable opacity, rotation, and size, files never leave your device.
- [Word to PDF Converter](https://induwara.lk/tools/word-to-pdf) — Inspect a Word (.docx) document locally in your browser and get routed to the best free, no-signup PDF converter for that exact file, privacy-first, sources cited.

### AI (289)

- [A/B Test Statistical Significance Calculator](https://induwara.lk/tools/ab-test-significance-calculator) — Check whether the difference between your control and variant is statistically significant or just noise. Enter visitors and conversions to get the conversion rates, relative uplift, p-value, confidence level, and a plain-English verdict from a two-proportion z-test. Runs in your browser; every result is cross-checked against Pearson's chi-square test.
- [Adjusted Rand Index (ARI) Calculator](https://induwara.lk/tools/adjusted-rand-index-calculator) — Compares two clusterings (or a clustering against ground-truth labels) and computes the Adjusted Rand Index, the raw Rand Index, and the Fowlkes–Mallows index from two pasted label lists, with the pair-counting working shown. Matches scikit-learn, runs in your browser.
- [AI Activation Function Calculator (ReLU, GELU, SiLU, ELU)](https://induwara.lk/tools/ai-activation-function-calculator) — Compute the common neural-network activation functions, ReLU, Leaky ReLU, GELU (exact and tanh approximation), SiLU/Swish, Tanh and ELU, for any value or vector, with each formula, its derivative, a plotted curve and step-by-step working. Matches PyTorch, runs entirely in your browser.
- [AI Agent Cost Calculator](https://induwara.lk/tools/ai-agent-cost-calculator) — Estimate the real per-run, daily, and monthly cost of a multi-step LLM agent across Claude, GPT, and Gemini. Models the context accumulation single-call calculators miss, each tool result is re-sent every step, with caching, in USD and LKR.
- [AI Agent Framework Comparison, LangGraph vs CrewAI vs LlamaIndex & more](https://induwara.lk/tools/ai-agent-framework-comparison) — Compare the major LLM agent-building frameworks, LangGraph, LlamaIndex, CrewAI, AutoGen, OpenAI Agents SDK, Google ADK, PydanticAI, Semantic Kernel and Strands, side by side on language, license, multi-agent model, streaming, memory, RAG, MCP/tools and observability. Filter by what you need and pick a stack in one screen. Runs entirely in your browser, every cell source-cited.
- [AI API Budget Calculator (Tokens & Requests You Can Afford)](https://induwara.lk/tools/ai-token-budget-calculator) — Enter a dollar budget, pick a model, and describe an average request. This tool inverts the cost formula to show how many API requests, tokens, words, and A4 pages that budget buys, how long it lasts, and what it's worth in LKR. Reuses the shared OpenAI/Claude/Gemini price table.
- [AI API Cost Calculator (OpenAI, Claude, Gemini)](https://induwara.lk/tools/ai-api-cost-calculator) — Estimate the monthly and per-request USD and LKR bill for any major LLM API. Pick a model, enter input/output tokens and requests per month, and compare every model cheapest-first, with optional 50% batch and cached-input discounts.
- [AI API Rate Limit Calculator](https://induwara.lk/tools/ai-rate-limit-calculator) — Computes whether an LLM workload will hit OpenAI, Anthropic, or Gemini rate limits, effective max requests/min, which limit binds (RPM vs TPM/ITPM/OTPM/RPD), and batch wall-clock time.
- [AI API Request Builder (cURL + Python + JavaScript)](https://induwara.lk/tools/ai-api-request-builder) — Build a ready-to-run curl, Python and Node.js request for the OpenAI, Anthropic and Gemini chat endpoints from a simple form, fully client-side, no key required. Each snippet embeds the official reference and reads your key from an environment variable.
- [AI API Service Tier Cost Calculator (OpenAI Standard vs Flex vs Priority)](https://induwara.lk/tools/ai-service-tier-cost-calculator) — Compare the monthly cost of OpenAI's Standard, Flex, and Priority service tiers for any model and token volume. See the exact 50% Flex saving, the per-model Priority premium, the latency trade-off, and which service_tier value to send, with USD and LKR figures and every price cited to OpenAI's docs.
- [AI Audio Token & Cost Calculator](https://induwara.lk/tools/ai-audio-token-cost-calculator) — Convert an audio clip's duration (or a measured audio_tokens count) into the exact audio input tokens GPT-4o-audio and Gemini bill, then price it per request and per month in USD and LKR. Gemini's fixed 32 tokens/second rule is cited; compares all four models side by side. Runs in your browser, no signup.
- [AI Audio Transcriber — Free Whisper, 99 Languages](https://induwara.lk/tools/ai-audio-transcriber) — Upload an audio or video file and get a timestamped transcript in 99 languages, including Sinhala and Tamil, using OpenAI Whisper on the Hugging Face Inference API. Export plain text, SRT subtitles, or VTT captions. No signup, no API key, no audio stored.
- [AI Avatar Video Cost Calculator (Synthesia, HeyGen, LKR)](https://induwara.lk/tools/ai-avatar-video-cost-calculator) — Compare the cost of AI avatar / talking-head videos across Synthesia, HeyGen, D-ID, Colossyan, and Hedra, normalised to an effective cost per minute, with monthly totals in USD and LKR and an optional 18% VAT line.
- [AI Avatar Video Generator Comparison (HeyGen vs Synthesia)](https://induwara.lk/tools/ai-avatar-video-generator-comparison) — Compare AI talking-avatar / spokesperson video generators, HeyGen, Synthesia, D-ID, Colossyan, Vidnoz, Elai, Creatify and Argil, side by side on price, included minutes, cost per finished minute, custom-avatar support, free tier, resolution, API and Sinhala/Tamil language coverage. Set your budget, minutes and language and the matcher ranks the best fit, with monthly cost in USD and LKR. Sources cited, no signup.
- [AI Batch API Cost Calculator](https://induwara.lk/tools/ai-batch-api-cost-calculator) — Estimate the 50% savings from running large OpenAI, Claude, and Gemini jobs through the asynchronous Batch API instead of standard synchronous calls. Compare standard vs batch cost in USD and LKR, with per-token math cited to each provider's docs.
- [AI Bot Blocker: robots.txt Generator (Block GPTBot, ClaudeBot, Google-Extended & more)](https://induwara.lk/tools/ai-robots-txt-generator) — Generate ready-to-paste robots.txt rules to block AI crawlers, GPTBot, ClaudeBot, Google-Extended, PerplexityBot, CCBot and more, while keeping Google and Bing search untouched. Pick training scrapers vs. AI-search bots, see each bot's SEO impact, copy or download. Runs entirely in your browser.
- [AI Browser Comparison (ChatGPT Atlas vs Perplexity Comet vs Dia vs Gemini in Chrome)](https://induwara.lk/tools/ai-browser-comparison) — Filterable comparison of agentic AI browsers, ChatGPT Atlas, Perplexity Comet, Dia, Gemini in Chrome, Edge Copilot Mode, Opera Neon and Brave (Leo), side by side on agent mode, free tier, paid price (USD + indicative LKR), platforms, engine, data-training policy, one-click Chrome import and Sri Lanka availability. Includes a pick-for-me filter and a subscription-cost calculator. Sources cited, no signup.
- [AI Chat Message Limit Calculator (ChatGPT, Claude, Gemini)](https://induwara.lk/tools/ai-chat-message-limit-calculator) — Work out how many messages you can send on ChatGPT, Claude, Gemini, Grok or Perplexity before hitting your plan's limit, when it resets, which model you drop to at the wall, and whether upgrading is worth it in rupees.
- [AI Chat Template Generator — ChatML, Llama 3, Mistral & more](https://induwara.lk/tools/ai-chat-template-generator) — Wrap a system prompt and a multi-turn conversation in the exact special tokens an open model expects, ChatML, Llama 3.x, Llama 2, Mistral, Gemma, Phi-3, Qwen, DeepSeek, Alpaca or Vicuna, and copy the ready-to-paste prompt for raw completion endpoints (Ollama, llama.cpp, vLLM). Fully in-browser.
- [AI Chatbot Availability by Country Checker](https://induwara.lk/tools/ai-chatbot-availability-by-country) — Pick a country and instantly see which major AI chatbots, ChatGPT, Gemini, Claude, Microsoft Copilot, Perplexity, Grok, Meta AI and DeepSeek, are officially available on web, mobile app and voice/advanced modes. Every row cites the provider's own supported-countries page. Defaults to Sri Lanka, works for every country.
- [AI Chatbot Conversation Cost Calculator](https://induwara.lk/tools/ai-chatbot-cost-calculator) — Estimate the monthly API cost of a multi-turn AI chatbot across Claude, GPT, and Gemini. Models the quadratic context re-sending that single-call calculators miss, with and without prompt caching, in USD and LKR.
- [AI Chatbot Memory Comparison — Which AI Assistants Remember You (2026)](https://induwara.lk/tools/ai-chatbot-memory-comparison) — Compare how ChatGPT, Claude, Gemini, Copilot, Grok, Meta AI, Perplexity and DeepSeek remember you, cross-session recall, free-tier access, and how to view, delete or disable memory. Filter by the capabilities you need; every row is sourced from the vendor's own help pages.
- [AI Chatbot Parental Controls & Teen Safety Comparison](https://induwara.lk/tools/ai-chatbot-parental-controls-comparison) — Compare parental controls, teen modes, content filtering, usage limits and self-harm safeguards across ChatGPT, Claude, Gemini, Copilot, Meta AI, Character.AI, Grok, Perplexity and DeepSeek. Enter a child's age and country for a plain-English verdict per chatbot, every control cited to the provider's own policy.
- [AI Chatbot Plan Comparison (ChatGPT vs Claude vs Gemini vs Grok vs Perplexity)](https://induwara.lk/tools/ai-chatbot-plan-comparison) — Compare the paid consumer plans of ChatGPT, Claude, Gemini, Grok and Perplexity side by side, message limits, models unlocked, vision, voice, file upload, image generation and deep research, plus price in USD and Sri Lankan rupees. Enter your usage and get the cheapest plan that fits. Sources cited, no signup.
- [AI Citation Generator (Cite ChatGPT, Claude & Gemini in APA, MLA, Chicago, Harvard, IEEE)](https://induwara.lk/tools/ai-citation-generator) — Generate correctly formatted references and in-text citations for ChatGPT, Claude and Gemini output in APA, MLA, Chicago, Harvard and IEEE, following each style guide's official rules for citing generative AI. Runs in your browser, no signup.
- [AI Code Execution Cost Calculator](https://induwara.lk/tools/ai-code-execution-cost-calculator) — Compare the server-side code execution (code interpreter / sandbox container) fee that Anthropic, OpenAI, and Google Gemini bill separately from model tokens. Enter your monthly runs and container uptime to see each provider's execution fee after free tiers, the effective cost per run, and which is cheapest at your volume.
- [AI Coding Assistant Comparison (Cursor vs Copilot vs Claude Code)](https://induwara.lk/tools/ai-coding-assistant-comparison) — Side-by-side comparison of the major AI coding assistants, Cursor, GitHub Copilot, Claude Code, Windsurf, Amazon Q Developer, JetBrains AI, Tabnine and Continue, by plan price, free tier, model access, IDE support, agent mode and self-host. Set your budget, IDE and team size and get the best-fitting product. Prices in USD, sources cited, no signup.
- [AI Coding Assistant Cost Calculator](https://induwara.lk/tools/ai-coding-assistant-cost-calculator) — Compare the real monthly and annual cost of GitHub Copilot, Cursor, Claude Code, Windsurf, Codeium, Tabnine, JetBrains AI and Gemini Code Assist for any team size. Pick plan tiers, add optional metered Claude Code API usage, and get the cheapest option in USD or Sri Lankan rupees. Sources cited, no signup.
- [AI Compute-Optimal (Chinchilla) Calculator](https://induwara.lk/tools/ai-compute-optimal-calculator) — Split a training-compute budget into the Chinchilla compute-optimal model size and token count using the 20-tokens-per-parameter rule and C = 6ND. Convert FLOPs, PFLOP-days, or GPU-hours, and check any N/D plan for its estimated loss and under- or over-tokening. Sources cited, runs in your browser.
- [AI Computer-Use / Browser-Agent Cost Calculator](https://induwara.lk/tools/ai-computer-use-cost-calculator) — Estimate the token cost of a Claude or OpenAI computer-use / browser-agent run, where every step re-sends a screenshot. See why cost grows super-linearly with steps, and how screenshot pruning and prompt caching cut the bill.
- [AI Content Detector Comparison (2026)](https://induwara.lk/tools/ai-content-detector-comparison) — Compare GPTZero, Turnitin, Originality.ai, Copyleaks, Winston AI, QuillBot, ZeroGPT and Scribbr side by side, free-tier limits, paid pricing, independently-benchmarked accuracy, false-positive rate, API and language support, then get a ranked shortlist for your budget and use case.
- [AI Content Ownership & Commercial Use Checker](https://induwara.lk/tools/ai-content-ownership-checker) — Find out who owns what you generate with AI, and whether you can use or sell it commercially. Pick your tool (ChatGPT, Midjourney, Suno, ElevenLabs, Firefly, Runway and more) and plan tier for a plain-English ownership, commercial-use and copyrightability verdict, with every provider's Terms linked. Free, no signup, sources cited.
- [AI Context Window Calculator](https://induwara.lk/tools/ai-context-window-calculator) — Pick an LLM (GPT, Claude, Gemini, Llama, DeepSeek), enter your text in words, characters, A4 pages, code lines or tokens, and instantly see whether it fits the model's context window, the percentage used, and how many tokens remain for the reply.
- [AI Context Window Comparison](https://induwara.lk/tools/ai-context-window-comparison) — Compare the input context window of every current LLM, GPT-5, Claude, Gemini, Llama 4, DeepSeek, Grok, Mistral, ranked by tokens and translated into words, A4 pages and lines of code. Sortable, filterable, copy as CSV or Markdown, every figure cited to the provider's own docs.
- [AI Conversation Cost Calculator — real multi-turn LLM chat cost](https://induwara.lk/tools/ai-conversation-cost-calculator) — Estimate the real API cost of a multi-turn LLM chat. Because the whole conversation history is resent as input on every turn, a long chat costs far more than reply-tokens × turns. See total input/output tokens, per-turn breakdown, the cumulative-cost curve, and how many times your naive first guess undershoots, for GPT-4o, Claude, Gemini, or custom rates.
- [AI Copyright Indemnity Checker](https://induwara.lk/tools/ai-copyright-indemnity-checker) — Find out whether your AI provider will legally defend you and pay the bill if generated content triggers a third-party copyright claim. Pick your service (OpenAI, Microsoft Copilot, GitHub Copilot, Google Vertex AI, Adobe Firefly, Anthropic, Amazon Bedrock and more), plan tier, content type and use for a Covered / Conditional / Not covered verdict, with the scope, payout cap, conditions to stay covered, and a link to the governing terms. Free, no signup, sources cited.
- [AI Cost Per User Calculator](https://induwara.lk/tools/ai-cost-per-user-calculator) — Turn model token prices into LLM cost per active user, break-even subscription price, and gross margin across Claude, GPT, and Gemini, in USD and LKR. Answers the unit-economics question single-bill calculators miss: at your price, do you make money on each user?
- [AI Cost Per Word Calculator (ChatGPT, Claude, Gemini)](https://induwara.lk/tools/ai-cost-per-word-calculator) — Convert AI token pricing into cost per word, per page, and per article for GPT-4o, Claude, and Gemini, in USD and LKR, with a cheapest-first model comparison and monthly totals.
- [AI Crawler robots.txt Generator — block GPTBot & other AI bots](https://induwara.lk/tools/robots-txt-ai-crawler-generator) — Generate a ready-to-paste robots.txt block that allows or blocks specific AI crawlers, GPTBot, ClaudeBot, Google-Extended, PerplexityBot, CCBot and 20+ more. One-click presets or per-bot control, RFC 9309 syntax, sources cited. Runs entirely in your browser, nothing uploaded.
- [AI Credits Calculator — credits to real cost (USD & LKR)](https://induwara.lk/tools/ai-credits-calculator) — Turn Midjourney, Runway, Suno, ElevenLabs and HeyGen credits into real money. See a job's credit cost, its price in USD and LKR, how many jobs each plan buys, and the cheapest plan for your monthly volume.
- [AI Data Privacy Comparison (Does ChatGPT / Claude / Gemini Train on Your Data?)](https://induwara.lk/tools/ai-data-privacy-comparison) — Does ChatGPT, Claude, Gemini, Copilot, Meta AI, Grok, DeepSeek or Mistral train on your data? A side-by-side reference across consumer, API and enterprise tiers, training, retention, human review, opt-out and Zero-Data-Retention, every cell cited to the official policy.
- [AI Deep Research Tool Comparison (ChatGPT vs Gemini vs Perplexity vs Claude vs Grok)](https://induwara.lk/tools/ai-deep-research-comparison) — Compare the five agentic AI deep-research modes, ChatGPT Deep Research, Gemini Deep Research, Perplexity Deep Research, Claude Research and Grok DeepSearch, side by side on plan price (USD + indicative LKR), free-tier run allowance, monthly run limits, underlying model, citation style, report length, document export and private-data connectors. Set your budget and use case for a rules-based best-fit recommendation and runner-up. Sources cited, no signup.
- [AI Diagram Generator (draw.io Files)](https://induwara.lk/tools/ai-diagram-generator) — Describe your system, database or process in plain English and an AI agent draws a professional, fully editable draw.io diagram for you, ER, use case, architecture, flowchart, Gantt and more. Free file download, 3 diagrams every 5 hours.
- [AI Document Token & Cost Calculator (PDF, Word, Text)](https://induwara.lk/tools/ai-document-token-cost-calculator) — Upload a PDF, Word, text, Markdown or code file and count its exact input tokens in your browser, then see what it costs to send to GPT-5, GPT-4o, Claude, Gemini, Llama, DeepSeek and Mistral, in USD and LKR, plus whether it fits each model's context window in a single call. No signup, no API key, no upload.
- [AI Effective Batch Size & Gradient Accumulation Calculator](https://induwara.lk/tools/ai-effective-batch-size-calculator) — Compute the effective (global) batch size of an LLM fine-tune from per-device batch, gradient accumulation steps, and GPU count, plus optimizer steps, warmup steps, and tokens seen. Reverse-solves the accumulation steps for a target batch. HF Trainer formula cited, runs in your browser.
- [AI Embedding Cost Calculator (OpenAI, Cohere, Voyage, Gemini)](https://induwara.lk/tools/ai-embedding-cost-calculator) — Estimate USD and LKR cost of generating vector embeddings across OpenAI, Cohere, Voyage AI, Google Gemini, and Mistral. One-time indexing, monthly queries, and first-year totals side-by-side with output dimensions, every price sourced.
- [AI Embedding Model Comparison](https://induwara.lk/tools/ai-embedding-model-comparison) — Compare popular text-embedding models (OpenAI, Cohere, Voyage, Google, Mistral, and open-source) by dimensions, max tokens, price per 1M, and MTEB quality score, and project the cost to embed your corpus.
- [AI Emotion Detector — Detect Emotion in Text, Free & In-Browser](https://induwara.lk/tools/ai-emotion-detector) — Detect emotion in any English text, anger, anticipation, disgust, fear, joy, sadness, surprise, trust, with per-emotion intensity bars and a dominant-emotion verdict. NRC EmoLex runs deterministically, an emotion-DistilRoBERTa model layers on. No signup, no model download, sources cited.
- [AI Energy & Carbon Footprint Calculator](https://induwara.lk/tools/ai-energy-carbon-calculator) — Estimate the electricity, CO₂e, and water footprint of your ChatGPT, Gemini, or other AI chatbot usage. Enter prompts per day and your country's grid to see energy, carbon, and relatable equivalents, every figure traced to a published source.
- [AI Exact Match & Token F1 Score Calculator (SQuAD)](https://induwara.lk/tools/ai-exact-match-f1-calculator) — Compute SQuAD-style Exact Match and token-level F1 between predicted and gold answers, single pair or batch, using the official SQuAD evaluation script's normalization and scoring rules. Runs entirely in your browser, no upload.
- [AI Face Blur (Photo Anonymizer) — Blur Faces Online Free](https://induwara.lk/tools/ai-face-blur) — Detect and blur, pixelate, or black out every face in a photo, entirely in your browser. No upload, no signup. Auto-detects faces, draw boxes by hand, and strips EXIF/GPS metadata on download.
- [AI File Upload Limit Lookup, ChatGPT, Claude, Gemini file size & page limits](https://induwara.lk/tools/ai-file-upload-limit-lookup) — Compare the exact file-upload limits of every major AI assistant, max file size, PDF page limit, images per message and files per chat, for ChatGPT, Claude, Gemini, Copilot, Perplexity, Grok and DeepSeek. Enter your file's size, type and page count to instantly see which assistants accept it and which reject it, with every figure linked to its official source.
- [AI Fill-Mask Word Predictor](https://induwara.lk/tools/ai-fill-mask-predictor) — Put a [MASK] blank in any English sentence and a BERT masked language model predicts the most likely words to fill it, each with a confidence score. Reads both sides of the blank, runs server-side with no API key, a live demo of how BERT works.
- [AI Fine-Tuning Cost Calculator (OpenAI GPT-4o, Llama)](https://induwara.lk/tools/ai-fine-tuning-cost-calculator) — Estimate the one-time training cost and ongoing monthly inference cost of fine-tuning an LLM (GPT-4o, GPT-4o mini, GPT-3.5 Turbo, Together AI Llama) from your token count, epochs, and usage, in USD and LKR.
- [AI Fine-Tuning Dataset Validator (JSONL)](https://induwara.lk/tools/ai-fine-tuning-dataset-validator) — Validate an OpenAI chat fine-tuning .jsonl dataset against the documented format rules, malformed lines, invalid roles, missing assistant replies, unknown keys, and estimate example count and training tokens. Runs entirely in your browser; no upload, no API key.
- [AI Flashcard Generator — Notes to Anki Cards, Free](https://induwara.lk/tools/ai-flashcard-generator) — Turn pasted notes or any passage into study flashcards (Q&A, term–definition, or cloze) with an in-browser spaced-repetition study mode and Anki, Quizlet, CSV, and JSON export.
- [AI Focal Loss Calculator](https://induwara.lk/tools/ai-focal-loss-calculator) — Compute focal loss FL(p_t) = −α_t(1 − p_t)^γ ln(p_t) for binary and multiclass predictions. Shows the focal loss, plain cross-entropy, modulating factor, α-weight, down-weighting ratio and batch mean, with full working, the loss that trains RetinaNet, cross-checked against torchvision sigmoid_focal_loss, entirely in the browser.
- [AI Free Tier Comparison (Free LLM API Limits)](https://induwara.lk/tools/ai-free-tier-comparison) — Compare the free tier of every major LLM API, Gemini, Groq, Mistral, OpenRouter, Cohere, Hugging Face, OpenAI and Anthropic. See free requests/day, rate limits, whether a credit card is required, vision support and whether prompts are used for training, then get the best no-cost option for your daily volume. Sources cited, no signup.
- [AI GPU Buy vs Rent Break-Even Calculator](https://induwara.lk/tools/ai-gpu-buy-vs-rent-calculator) — Work out whether it's cheaper to buy a GPU (RTX 4090/5090, A100, H100) or rent one from the cloud. Computes the break-even in months and active GPU-hours, plus the effective cost per GPU-hour of owning vs renting at your utilization. Sources cited.
- [AI GPU Cloud Cost Calculator (RunPod, Lambda, Vast.ai, AWS)](https://induwara.lk/tools/ai-gpu-cloud-cost-calculator) — Estimate what it costs to rent cloud GPUs (RTX 4090, A100, H100, B200) to train or serve an AI model, and compare the same job across RunPod, Lambda, Vast.ai, and AWS, on-demand and spot, in USD and LKR.
- [AI GPU Comparison (Best GPU to Run LLMs Locally)](https://induwara.lk/tools/ai-gpu-comparison) — Compare the NVIDIA GPUs people use to run and fine-tune LLMs (RTX 3060/3090/4090/5090, L40S, RTX 6000 Ada, A100, H100, H200) on VRAM, bandwidth, FP16 TFLOPS, power and price. Pick a model + quantization to see which card fits and the best value buy. Specs cited.
- [AI GPU Power Supply (PSU) Wattage Calculator](https://induwara.lk/tools/ai-gpu-power-supply-calculator) — Size the PSU for a single- or multi-GPU AI, local-LLM or Stable-Diffusion rig: recommended wattage, PCIe connectors, ATX 3.0 requirement, wall draw and running cost from official NVIDIA/AMD GPU and CPU TDPs. Free, no signup, sources cited.
- [AI Grammar Checker — Free, Server-Side, No Signup](https://induwara.lk/tools/ai-grammar-checker) — Paste any English paragraph and get a corrected version side-by-side with the original, each edit highlighted and labelled. LanguageTool engine server-side, deterministic rule baseline cross-check. No upload, no API key, no signup.
- [AI Grammar Checker Comparison — Grammarly vs QuillBot vs More](https://induwara.lk/tools/ai-grammar-checker-comparison) — Compare Grammarly, QuillBot, LanguageTool, ProWritingAid, Ginger and Microsoft Editor on free-tier limits, price, languages, plagiarism, paraphrase, offline and privacy. Pick your use case and required features and see the best-fit tool, a factual decision aid, every figure sourced.
- [AI Hallucination Rate Comparison (Vectara HHEM Leaderboard)](https://induwara.lk/tools/ai-hallucination-rate-comparison) — Compare how often leading LLMs hallucinate using the published Vectara HHEM factual-consistency leaderboard. Pick two models and a document count to see each one's hallucination rate, factual-consistency rate, answer rate, the relative reduction, and the expected number of wrong summaries for your batch. Full ranked table of 30 models included.
- [AI Hashtag Generator — Free, No Signup, From Your Text](https://induwara.lk/tools/ai-hashtag-generator) — Generate ranked, copy-ready, platform-aware hashtags from any caption or topic, extracted in your browser with YAKE/RAKE, capped at each platform's real limit, no signup.
- [AI Headshot Generator Comparison — price & cost per headshot](https://induwara.lk/tools/ai-headshot-generator-comparison) — Compare the major AI headshot generators (Aragon AI, HeadshotPro, BetterPic, Secta, PhotoAI, Dreamwave) on price, headshots delivered, turnaround, resolution and ownership rights, with a filter and a cost-per-headshot calculation so you can compare like for like.
- [AI Image Alt-Text Generator — Free, WCAG-Friendly, No Signup](https://induwara.lk/tools/ai-image-alt-text-generator) — Drop an image and get a concise, WCAG-friendly alt-text string plus two longer caption variants. BLIP captioning runs server-side via the Hugging Face Inference API, with a built-in WebAIM linter and W3C role-aware guidance.
- [AI Image Detector, Check if a Photo Is AI-Generated (Content Credentials & Metadata)](https://induwara.lk/tools/ai-image-detector) — Check whether an image is AI-generated by reading its provenance metadata, C2PA Content Credentials, IPTC DigitalSourceType, and known generator signatures (Firefly, DALL·E, Midjourney, Stable Diffusion). Runs entirely in your browser; the image never leaves your device.
- [AI Image Editing Cost Calculator (USD + LKR)](https://induwara.lk/tools/ai-image-editing-cost-calculator) — Estimate the API cost of editing images with Gemini 2.5 Flash Image (Nano Banana), GPT Image 1.5, FLUX.1 Kontext [pro]/[max], FLUX.2 [pro], and Qwen-Image-Edit, including the input-image tokens plain generation calculators miss. Per-edit and batch totals in USD and LKR, every rate sourced.
- [AI Image Generation Cost Calculator (USD + LKR)](https://induwara.lk/tools/ai-image-generation-cost-calculator) — Compare monthly cost of generating AI images across DALL-E 3, Imagen 3, Flux Pro, Stable Diffusion 3.5, Ideogram, and Recraft V3. Per-image and monthly totals in USD and LKR, every price sourced.
- [AI Image Generator Comparison (Midjourney vs DALL-E vs FLUX)](https://induwara.lk/tools/ai-image-generator-comparison) — Side-by-side comparison of the major AI image generators, Midjourney, OpenAI GPT Image, Google Imagen, FLUX, Adobe Firefly, Stable Diffusion, Ideogram and Leonardo, by cheapest plan, free tier, per-image API price, max resolution, commercial-use licensing, open weights and text-in-image quality. Filter by what you need and get a source-cited recommendation. No signup.
- [AI Image Model VRAM Calculator](https://induwara.lk/tools/ai-image-model-vram-calculator) — Estimate the GPU VRAM needed to run image-generation models (Stable Diffusion 1.5, SDXL, SD 3.5, Flux.1) at a chosen precision, resolution, and batch size, and see which 6/8/12/16/24 GB GPU fits and which memory optimizations make a too-big model fit. Runs in your browser.
- [AI Image Prompt Generator (Midjourney, SDXL, DALL·E 3)](https://induwara.lk/tools/ai-image-prompt-generator) — Build copy-ready image-generation prompts for Midjourney, Stable Diffusion (SDXL), and DALL·E 3 from guided fields, correct --ar/--stylize syntax, weighted terms, and a separate negative-prompt block. Runs in your browser, no signup.
- [AI Image Size & Aspect Ratio Calculator](https://induwara.lk/tools/ai-image-size-calculator) — Find the exact, model-valid output dimensions for any AI image model, SDXL, DALL·E 3, GPT-Image-1, SD 1.5/3.5, Flux.1, Midjourney, snapped to its documented resolution grid and megapixel limit. Runs entirely in your browser.
- [AI Image to Prompt (Reverse Prompt Generator)](https://induwara.lk/tools/ai-image-to-prompt) — Upload any image and get copy-ready text-to-image prompts for Midjourney, Stable Diffusion, and DALL·E 3. Exact aspect ratio and colour palette are computed in your browser; a free BLIP caption suggests the subject. No signup, no watermark.
- [AI Image Upscaler Comparison (2026)](https://induwara.lk/tools/ai-image-upscaler-comparison) — Compare the main AI image upscalers, Topaz Gigapixel, Upscayl, Magnific, Let's Enhance, Bigjpg, Krea, Adobe and Pixelcut, by max upscale factor, offline vs online, free tier, API and price. Enter images per month and get the cheapest option ranked in LKR. Sources cited, no signup.
- [AI Inference Provider Comparison — cheapest LLM API by price & speed](https://induwara.lk/tools/ai-inference-provider-comparison) — Compare the serverless open-model LLM API hosts, Together AI, Fireworks AI, DeepInfra, Groq, Cerebras, OpenRouter, Novita and Hyperbolic, on price per million tokens and output throughput (tokens/sec) for the same reference model. A built-in estimator turns your monthly input/output token volume into a ranked monthly bill in USD and LKR, flagging the cheapest host and the fastest. Snapshot prices, sources cited, no signup.
- [AI JSON Repair — Fix Broken JSON From ChatGPT & Claude](https://induwara.lk/tools/ai-json-repair) — Paste the malformed JSON an LLM returned, Markdown fences, trailing commas, single quotes, Python True/None, comments, or a truncated tail, and get valid, parseable JSON instantly. Lists every fix applied. 100% in your browser, no signup, no API key.
- [AI Keyword Extractor — Free, Browser-Only](https://induwara.lk/tools/ai-keyword-extractor) — Extract the most important keywords and key phrases from any text. Runs YAKE (statistical) and RAKE (co-occurrence) side by side, entirely in your browser. No API key, no signup, sources cited.
- [AI Knowledge Cutoff & Release Date Lookup](https://induwara.lk/tools/ai-knowledge-cutoff-lookup) — Look up any major LLM's training-data knowledge cutoff and release date, straight from the provider's model card, with how stale its knowledge is today.
- [AI Language Detector — 100+ Languages, Free](https://induwara.lk/tools/ai-language-detector) — Detect the language of any text snippet, Sinhala, Tamil, Hindi, English, Chinese, and 100+ more. Unicode-script analysis plus a server-side tri-gram classifier. No API keys, no signup, sources cited.
- [AI Language Token Tax Calculator (Sinhala, Tamil & 20+ Languages)](https://induwara.lk/tools/ai-language-token-tax-calculator) — See how many extra tokens Sinhala, Tamil and 20+ languages cost on the OpenAI API compared with English. Runs the real tiktoken vocabularies (o200k_base & cl100k_base) in your browser for exact counts, a live cross-language multiplier table, and per-request and monthly API-cost projections. No signup, no upload.
- [AI Learning Rate Scheduler Calculator (Warmup, Cosine, Linear, Noam)](https://induwara.lk/tools/ai-learning-rate-scheduler-calculator) — Compute and plot the exact per-step learning rate for the common deep-learning schedules, linear, cosine, and constant with warmup, plus the Transformer (Noam) inverse-sqrt schedule. Enter peak LR, total steps and warmup, see the LR-vs-step curve and key values, and copy the matching Hugging Face transformers snippet. Factors match transformers exactly.
- [AI LLM Benchmark Comparison (MMLU, GPQA, SWE-bench)](https://induwara.lk/tools/ai-llm-benchmark-comparison) — Compare the top large language models by their published benchmark scores, MMLU-Pro, GPQA Diamond, SWE-bench Verified, HumanEval, AIME, MATH and MMMU. Pick 2–6 models, sort by any benchmark, and get an apples-to-apples composite. Every figure cited from the vendor's own model card.
- [AI LLM License & Commercial-Use Checker](https://induwara.lk/tools/ai-llm-license-checker) — Check in plain English whether Llama, Mistral, Gemma, Qwen, DeepSeek, Command R, GPT, Claude or Gemini is free for commercial use, with MAU caps, attribution rules, and a link to each official license. Free, no signup, sources cited.
- [AI LLM Price History Tracker](https://induwara.lk/tools/ai-llm-price-history-tracker) — Track the dated API price of every major large-language model, GPT, Claude, Gemini, Grok and hosted open-weights, from launch to today, in one filterable table and trend chart. A cost time-machine shows what your monthly token workload would have cost in 2023, 2024, 2025 and now, and exactly how much you save today. Every figure is a cited, dated list price.
- [AI LLM Quantization Method Comparison (GGUF vs GPTQ vs AWQ vs bitsandbytes vs EXL2)](https://induwara.lk/tools/ai-quantization-method-comparison) — Compare the main LLM quantization methods, GGUF k-quants, GPTQ, AWQ, bitsandbytes (INT8/NF4) and EXL2, side by side. Enter a model's parameter count and your GPU VRAM to see on-disk size, load VRAM, quality retention, speed and tooling for each, and which ones fit your card. Published bits-per-weight and perplexity deltas cited.
- [AI LLM Speed & Latency Comparison — Tokens/sec & TTFT](https://induwara.lk/tools/ai-llm-speed-comparison) — Compare the real-world response speed of hosted LLM APIs, GPT, Claude, Gemini, Llama, DeepSeek, Grok, Mistral. Pick 2–6 models, enter your output length, and rank them by estimated total response time, output tokens/sec, and time-to-first-token. Every figure cited from Artificial Analysis medians.
- [AI Logit Bias Calculator (OpenAI)](https://induwara.lk/tools/ai-logit-bias-calculator) — Interactive visualizer for OpenAI's logit_bias parameter. Set a bias from −100 to +100 on any token and watch the next-token softmax renormalize, ban a word, force a Yes/No answer, or nudge, with the exact math token by token. Runs in your browser, no API key, sources cited.
- [AI Logprob to Probability Calculator (Token Confidence)](https://induwara.lk/tools/ai-logprob-to-probability-calculator) — Convert OpenAI/vLLM logprobs into token confidence %, top-alternative probabilities, joint sequence probability and perplexity, browser-only, no API key.
- [AI Long-Context Pricing Calculator (Gemini, Claude 1M)](https://induwara.lk/tools/ai-long-context-pricing-calculator) — Calculate the true API cost of large prompts on models with a long-context premium, Gemini 2.5 Pro and Claude Sonnet 4.5 (1M beta) reprice the whole request above 200K tokens. See the surcharge over a naive flat-rate estimate, compare every model cheapest-first, and convert the monthly total to LKR. Sources cited, no signup.
- [AI LoRA Trainable Parameter & Adapter Size Calculator](https://induwara.lk/tools/ai-lora-calculator) — Compute exactly how many trainable parameters a LoRA/QLoRA fine-tune adds to Llama 3, Mistral, Qwen2.5, Gemma 2, or a custom LLM, plus the percentage of the base model, the on-disk adapter size, and the training memory. Reproduces PEFT's print_trainable_parameters().
- [AI Meeting Note-Taker & Transcription Assistant Comparison](https://induwara.lk/tools/ai-meeting-note-taker-comparison) — Compare the major AI meeting note-takers (Otter, Fireflies, Fathom, Granola, tl;dv and more) by per-seat price, free-tier limits, languages and integrations, ranked by your team's projected cost.
- [AI Min-p & Typical Sampling Calculator](https://induwara.lk/tools/ai-min-p-sampling-calculator) — Interactive calculator for LLM min-p and locally-typical sampling. Drag min_p or typical_p and watch which next-token candidates survive, get zeroed, and renormalize, with the exact math token by token. Runs in your browser, no API key, sources cited.
- [AI Mixture-of-Experts (MoE) Calculator](https://induwara.lk/tools/ai-mixture-of-experts-calculator) — Work out an MoE LLM's active parameters per token, active %, and weights-only VRAM at FP16/FP8/INT4. Presets for Mixtral, DeepSeek-V3, Llama 4, DBRX, Qwen and Grok, or enter a custom expert config.
- [AI Model Card Generator — Hugging Face README & YAML Metadata](https://induwara.lk/tools/ai-model-card-generator) — Generate a complete, Hub-valid Hugging Face model card (README.md) from a form, correctly-keyed YAML frontmatter (license, pipeline_tag, datasets, model-index) plus the standard documentation sections. Runs in your browser, nothing you type is uploaded.
- [AI Model Comparison — Side by Side](https://induwara.lk/tools/ai-model-comparison) — Compare the latest LLMs side by side, GPT-5, Claude 4.5, Gemini 2.5, Llama 4, DeepSeek, Grok, Mistral. Context windows, input and output pricing, vision, function calling, training cutoff. Project monthly cost for your workload. Sources cited.
- [AI Model Deprecation & Lifecycle Tracker](https://induwara.lk/tools/ai-model-deprecation-tracker) — Check whether the OpenAI, Anthropic, Google, or Azure model you call is active, deprecated, or retired, with official shutdown dates, a live days-until-retirement countdown, and the recommended replacement. Every row cites the provider's own deprecations page.
- [AI Model Download Time Calculator — GGUF & LLM Size](https://induwara.lk/tools/ai-model-download-time-calculator) — Estimate how long it takes to download a local AI model (LLM GGUF quant or full-precision weights) at your internet speed, and how much data it uses. Popular model presets with exact Hugging Face file sizes, Sri Lanka broadband presets, and a speed-comparison table. Free, no signup.
- [AI Model Elo Rating Calculator (LLM Arena Win-Rate & Bradley–Terry)](https://induwara.lk/tools/ai-elo-rating-calculator) — Compute Elo the way LLM leaderboards do: win probability from two ratings, updated ratings after a game with any K-factor, or an empirical win rate converted to an Elo gap (Bradley–Terry). Every formula is shown, runs in your browser, no signup.
- [AI Model Feature Support Matrix (LLM caniuse)](https://induwara.lk/tools/ai-model-feature-support-matrix) — A caniuse-style capability matrix for LLM APIs: filter which production AI models support vision, function calling, JSON mode, prompt caching, batch, fine-tuning, PDF input, reasoning, web search and more. Pick a feature to see every model that has it, or a model to see everything it can do, cited to the OpenAI, Anthropic, Google, Meta, Mistral, DeepSeek and xAI docs.
- [AI Model FLOPs Utilization (MFU) Calculator](https://induwara.lk/tools/ai-mfu-calculator) — Calculate the Model FLOPs Utilization (MFU) of an LLM training or inference run from model size, token throughput, GPU count and precision, using the published 6N / 2N convention and dense NVIDIA tensor-core peaks.
- [AI Model ID Cheat Sheet — Exact API Model Strings](https://induwara.lk/tools/ai-model-id-cheatsheet) — The exact API model identifier strings for OpenAI, Anthropic, Google Gemini, Meta Llama, Mistral, DeepSeek and xAI Grok, each with a copy button, base endpoint URL and a minimal cURL/Python/JS snippet. Filter by provider and modality, toggle aliased vs pinned IDs. Sources cited.
- [AI Model Language Support Checker](https://induwara.lk/tools/ai-model-language-support-checker) — See which AI models officially support Sinhala, Tamil or any of 100+ languages, for chat, translation and speech. Pick a language to compare GPT-5, Claude, Gemini, Llama, Whisper and NLLB-200, or pick a model to list every language its provider documents. Each answer links to the provider's own docs.
- [AI Model Max Output Tokens Lookup](https://induwara.lk/tools/ai-max-output-tokens-lookup) — Look up the maximum output (completion) tokens for every current LLM, Claude, GPT-4o, Gemini, Llama and more, and check whether your desired response fits in a single API call or needs chunking. Per-model caps cited from vendor docs, separate from the context window.
- [AI Model Parameter Support Checker (OpenAI, Claude, Gemini)](https://induwara.lk/tools/ai-model-parameter-support-checker) — Check whether an LLM accepts a given API parameter, temperature, top_p, penalties, logprobs, tools, JSON output, vision, with its valid range, default and exact field name (max_tokens vs max_completion_tokens, top_p vs topP). Fixes the 400 errors that hit when porting between OpenAI, Anthropic Claude and Google Gemini or switching to a reasoning model.
- [AI Model Release Timeline — LLM Launch Dates](https://induwara.lk/tools/ai-model-release-timeline) — Filterable timeline of every major AI model launch, GPT, Claude, Gemini, Llama, Mistral, DeepSeek, Qwen and Grok, with official release dates, model-type badges, and a live days-since-release figure. Search by model or maker, filter by year or type.
- [AI Model Size & Quantization Calculator](https://induwara.lk/tools/ai-model-size-calculator) — Calculate the exact on-disk file size of any LLM at FP32, FP16, 8-bit, 4-bit, or GGUF quants like Q4_K_M, and how long it downloads on your connection. Compare every quant side by side. Free, no signup, sources cited.
- [AI Multimodal Model Comparison (Image, Audio & Video Support)](https://induwara.lk/tools/ai-multimodal-model-comparison) — See which AI models support vision, audio, video and PDF input through their documented APIs, GPT, Claude, Gemini, Llama and Qwen. Filter by the exact modalities your app needs and read each model's per-request media limits. Sources cited per row.
- [AI Music Generation Cost Calculator (Suno, Udio, ElevenLabs)](https://induwara.lk/tools/ai-music-generation-cost-calculator) — Compare what it costs to generate AI music each month across Suno, Udio, ElevenLabs Music, and Mubert. Picks the cheapest commercial plan for your volume and shows effective cost per song in USD and LKR.
- [AI Music Generator Comparison (Suno vs Udio vs ElevenLabs)](https://induwara.lk/tools/ai-music-generator-comparison) — Side-by-side comparison of the major AI music generators, Suno, Udio, ElevenLabs Music, Stable Audio, AIVA, Soundraw, Beatoven and Mubert, by cheapest plan, free tier, vocals vs instrumental, max track length, output formats, commercial use, copyright ownership and public API. Filter by what you need and get a source-cited recommendation. No signup.
- [AI Mutual Information Calculator](https://induwara.lk/tools/ai-mutual-information-calculator) — Compute the mutual information I(X;Y) between two discrete variables from a count or joint-probability table, in bits or nats, with the full information-theory breakdown, marginal entropies H(X), H(Y), joint entropy H(X,Y), conditional entropies, normalized MI, and every per-cell term. Runs in your browser, matched to scikit-learn.
- [AI Named Entity Recognizer (NER) — Free, Server-Side](https://induwara.lk/tools/ai-named-entity-recognizer) — Extract people, organisations, locations, and proper nouns from any English text. BERT NER runs server-side via Hugging Face, no signup, no model download, CSV and JSON export, sources cited.
- [AI Object Detector — Free DETR & YOLOS Bounding Boxes](https://induwara.lk/tools/ai-object-detector) — Detect objects in any image with labelled bounding boxes, class names, confidence scores, and pixel coordinates. DETR and YOLOS transformers run server-side via the Hugging Face Inference API. COCO 80 classes, JSON + YOLO export, no signup.
- [AI OCR Cost Calculator (Textract vs Google vs Azure vs Mistral)](https://induwara.lk/tools/ai-ocr-cost-calculator) — Compare the monthly cost of document OCR across AWS Textract, Google Document AI, Azure Document Intelligence, and Mistral OCR from one input, pages per month and what you need extracted. Ranks vendors cheapest-first in USD and LKR, with published per-1,000-page rates and volume tiers cited.
- [AI One-Hot Encoder (Categorical to Numeric)](https://induwara.lk/tools/ai-one-hot-encoder) — Browser-only one-hot encoder that converts a categorical column into a 0/1 matrix matching scikit-learn OneHotEncoder and pandas get_dummies, with lexicographic/numeric/first-seen ordering, drop-first, a label-encoding comparison, and copy-ready Python, CSV and NumPy.
- [AI Paraphrasing Tool (Free Sentence & Article Rewriter)](https://induwara.lk/tools/ai-paraphrasing-tool) — Reword English text in four modes with a seq2seq paraphrase model, plus a deterministic word-overlap and change-metrics cross-check, free, no signup, sources cited.
- [AI Part-of-Speech Tagger](https://induwara.lk/tools/ai-part-of-speech-tagger) — Paste any English sentence and label every word with its part of speech, noun, verb, adjective, adverb and 13 more Universal POS tags. Colour-codes the text, counts each tag, and runs entirely in your browser, so nothing you type is uploaded.
- [AI pass@k Calculator (HumanEval Code Metric)](https://induwara.lk/tools/ai-pass-at-k-calculator) — Compute the unbiased pass@k metric for evaluating code-generation LLMs from samples (n), correct samples (c), and k, single problem or whole benchmark, fully in your browser. Matches the Chen et al. 2021 estimator and OpenAI's human-eval reference code, with a binomial cross-check and per-problem breakdown.
- [AI PII Redactor (Sri Lanka NIC + Global)](https://induwara.lk/tools/ai-pii-redactor) — Detect and redact PII, Sri Lanka NIC numbers, phones, emails, credit cards, IBANs, and IPs, from any pasted text. Regex + checksum validation, 100% client-side, no upload, no signup.
- [AI Population Stability Index (PSI) Calculator](https://induwara.lk/tools/ai-population-stability-index-calculator) — Compute the Population Stability Index (PSI) between an expected and an actual distribution to quantify data or population drift in ML models and credit scorecards. Paste bin counts or percentages to get the total PSI, a per-bin contribution breakdown, and a stable / moderate / significant verdict. Uses the Siddiqi formula and thresholds, runs in the browser.
- [AI Presence & Frequency Penalty Calculator](https://induwara.lk/tools/ai-presence-frequency-penalty-calculator) — See exactly how OpenAI's presence_penalty and frequency_penalty reshape next-token logits and softmax probabilities. Enter candidate tokens with logits and prior counts, drag the sliders, and watch the most likely next token flip. Uses the exact additive formula, runs in your browser.
- [AI Presentation Maker (PDF & PPTX)](https://induwara.lk/tools/ai-presentation-maker) — Describe your topic and get a designed, editable presentation: AI plans it slide by slide, you approve the outline, then it writes the deck with real images, icons and themes. Edit anything (or ask AI), then download as PDF, PowerPoint or animated HTML. Free.
- [AI Presentation Maker Comparison — Gamma vs Canva & more](https://induwara.lk/tools/ai-presentation-maker-comparison) — Compare 9 AI presentation makers, Gamma, Canva, Beautiful.ai, Tome, Plus AI, SlidesAI, Decktopus, Presentations.AI and Pitch, by free tier, price, PPTX/PDF export, watermark, brand kit and Google Slides support. Filter by use case and budget for a ranked shortlist. Sources cited.
- [AI Prompt Caching Cost Calculator](https://induwara.lk/tools/ai-prompt-caching-cost-calculator) — Calculate how much prompt caching saves on your LLM API bill. Compare cost with vs without caching, the dollar savings, and the break-even point for Claude, OpenAI, and Gemini using each provider's official cache-write and cache-read multipliers.
- [AI Prompt Formatter — Turn Rough Notes Into Clear Prompts](https://induwara.lk/tools/ai-prompt-formatter) — Paste rough notes and get a well-structured AI prompt with role, task, constraints, and output format. Works with GPT, Claude, Gemini. Deterministic templating, runs entirely in your browser.
- [AI Prompt Injection Tester — Free Online Checker](https://induwara.lk/tools/ai-prompt-injection-tester) — Scan any prompt or user message against a categorised ruleset of known prompt-injection and jailbreak patterns, instruction override, system-prompt exfiltration, persona hijack, encoded payloads, delimiter smuggling, tool abuse. Deterministic risk score, per-finding OWASP LLM01 mitigations, base64/hex decode & re-scan. Runs 100% in your browser; no text ever leaves the page.
- [AI Prompt Library — Free Prompt Templates](https://induwara.lk/tools/ai-prompt-library) — 48 structured, source-cited prompt templates for ChatGPT, Claude, Gemini, and Llama. Categories cover writing, coding, analysis, learning, marketing, and productivity. Filter, fill placeholders, copy in one click, no signup, no API call.
- [AI Question Answering — Free Extractive QA Over Any Passage](https://induwara.lk/tools/ai-question-answering) — Paste any English passage and ask a question, the tool returns the exact span that answers it, with a confidence score. DistilBERT-SQuAD inference runs server-side; a keyword baseline runs alongside as a cross-check. No signup, no API key.
- [AI Quiz Generator (MCQ Maker)](https://induwara.lk/tools/ai-quiz-generator) — Paste notes, a passage, or a transcript and get a multiple-choice quiz, stems, plausible distractors, one correct answer, and explanations. Take it in the browser with instant scoring, edit any question, then export to Moodle GIFT/Aiken, CSV, JSON, or a printable PDF. No signup; taking and exporting work offline.
- [AI RAG Cost Calculator (Embedding + Storage + LLM)](https://induwara.lk/tools/ai-rag-cost-calculator) — Estimate the full one-time and monthly cost of a Retrieval-Augmented Generation pipeline, embedding, vector storage, retrieval, and LLM generation, across OpenAI, Anthropic, Google, Cohere and Pinecone, in USD and LKR. Every price sourced.
- [AI RAG vs Long-Context Cost Calculator](https://induwara.lk/tools/ai-rag-vs-long-context-calculator) — Should you retrieve the relevant chunks (RAG) or stuff the whole document into a long context window? Price both approaches per query and per month across Claude, GPT and Gemini, with prompt caching and the break-even corpus size. Free, sources cited.
- [AI Realtime Voice API Cost Calculator, OpenAI & Gemini Live](https://induwara.lk/tools/ai-realtime-api-cost-calculator) — Estimate the per-session, monthly and annual cost of a speech-to-speech voice agent on the OpenAI Realtime API or Gemini Live API. Models all four billed token classes, audio in, cached audio, audio out and text, in USD and LKR. Runs in your browser, no signup.
- [AI Reasoning Model Comparison — o3, GPT-5, Claude, Gemini, R1](https://induwara.lk/tools/ai-reasoning-model-comparison) — Side-by-side comparison of the major AI reasoning models, OpenAI o3 & GPT-5 thinking, Claude extended thinking, Gemini thinking, DeepSeek-R1, Grok 4 and Qwen3, by reasoning-token pricing, context window, knowledge cutoff and AIME / GPQA / SWE-bench scores. Sort, filter, pick by use case, and estimate a task's true cost once hidden thinking tokens are counted. Sources cited, no signup.
- [AI Reasoning Token Cost Calculator](https://induwara.lk/tools/ai-reasoning-token-cost-calculator) — Estimate the true cost of reasoning-model API calls by accounting for the hidden reasoning/thinking tokens that o-series, Claude, and Gemini bill at output rates. See per-call and monthly cost in USD and LKR, plus how much more it is than a naive estimate.
- [AI Repetition, Frequency & Presence Penalty Calculator](https://induwara.lk/tools/ai-repetition-penalty-calculator) — See exactly how OpenAI's frequency_penalty and presence_penalty (subtractive) and HuggingFace/CTRL's repetition_penalty θ (divisive) reshape next-token logits and softmax probabilities from each token's prior count. Enter a small logit + count table, drag the penalties, and watch repeated tokens collapse, with both math conventions and the softmax shown side by side. Runs in your browser.
- [AI Reranker Cost Calculator](https://induwara.lk/tools/ai-reranker-cost-calculator) — Estimate the monthly API cost of a RAG reranker, Cohere Rerank, Voyage rerank-2 / rerank-2-lite and Jina Reranker v2, side by side. Handles both search-unit and per-token billing, shows the cheapest option and cost per 1,000 queries. Free, sources cited.
- [AI Resume ATS Checker — Score Your Resume Against Job Descriptions](https://induwara.lk/tools/ai-resume-ats-checker) — Paste a resume and a job description to see an ATS score, missing keywords, format issues parsers struggle with, and section gaps. Scoring follows Workday, Greenhouse, and Lever guidance plus Jobscan's 2024 threshold. Runs in your browser, no signup.
- [AI Resume Builder Comparison (Rezi vs Teal vs Kickresume vs Zety)](https://induwara.lk/tools/ai-resume-builder-comparison) — Compare the major AI resume builders, Rezi, Teal, Kickresume, Enhancv, Zety, Novoresume, Resume.io, Canva and the free ChatGPT route, by price, free-tier limits, ATS optimization, AI bullet writing, one-click job tailoring and cover-letter support. Set your budget and priority, get a ranked pick with sources cited.
- [AI Roofline Model Calculator](https://induwara.lk/tools/ai-roofline-calculator) — Plot a GPU kernel on the Roofline model: enter peak compute and memory bandwidth (or pick an A100/H100/V100/RTX preset) plus the kernel's FLOPs and bytes moved to get its arithmetic intensity, the machine's ridge point, attainable performance, and whether it is compute-bound or memory-bound, with a log-log roofline chart.
- [AI RoPE Context Length Extension Calculator](https://induwara.lk/tools/ai-rope-context-extension-calculator) — Compute the exact RoPE scaling parameters to extend an LLM's context window, Linear Position Interpolation, NTK-aware rope_theta, Dynamic NTK, and YaRN, and get the copy-ready Hugging Face rope_scaling config for each method.
- [AI Search Engine Comparison (Perplexity vs ChatGPT Search vs Gemini vs Grok)](https://induwara.lk/tools/ai-search-engine-comparison) — Compare the major consumer AI answer engines, Perplexity, ChatGPT Search, Google Gemini, Microsoft Copilot, Grok, Claude and DeepSeek, side by side on free-tier limits, paid price (USD + indicative LKR), citations, real-time web access, file/image upload, API and data-training policy. Includes a built-in annual-cost calculator (service × plan × seats → USD + LKR). Sources cited, no signup.
- [AI Self-Hosting vs API Cost Calculator (Break-Even)](https://induwara.lk/tools/ai-self-hosting-cost-calculator) — Find the monthly token volume where renting a cloud GPU to self-host an open LLM (Llama, Mistral, Qwen) beats paying a closed API per token. Shows both monthly costs, the crossover volume, and a self-host or stay-on-API verdict in USD and LKR.
- [AI Sentiment Analyzer — Free, Server-Side](https://induwara.lk/tools/ai-sentiment-analyzer) — Detect positive, negative, or neutral sentiment in any English text. DistilBERT-SST-2 runs server-side, AFINN-111 lexicon cross-check runs alongside. No signup, no model download, per-sentence breakdown, sources cited.
- [AI Speculative Decoding Speedup Calculator](https://induwara.lk/tools/ai-speculative-decoding-calculator) — Compute the expected LLM inference speedup from speculative decoding from acceptance rate, draft tokens per step, and draft/target cost ratio using the Leviathan et al. improvement-factor formula.
- [AI Speech-to-Text API Comparison](https://induwara.lk/tools/ai-speech-to-text-comparison) — Side-by-side comparison of the major hosted speech-to-text (STT) APIs, OpenAI Whisper, Deepgram, AssemblyAI, Google Cloud, Azure AI Speech, Amazon Transcribe, Groq, ElevenLabs Scribe and Rev AI, by price per minute, real-time vs batch support, diarization, word timestamps, language coverage and published WER. Pick your providers, enter your monthly audio volume, and rank them by projected cost. Every figure cites the vendor source.
- [AI Subscription Cost Calculator (Monthly & Annual, LKR)](https://induwara.lk/tools/ai-subscription-cost-calculator) — Add up what you pay for ChatGPT, Claude, Gemini, Perplexity, Copilot, Cursor, Midjourney and Grok subscriptions across monthly and annual billing, converted to Sri Lankan rupees with an optional 18% VAT line.
- [AI Subscription vs API Break-Even Calculator](https://induwara.lk/tools/ai-subscription-vs-api-calculator) — Find out whether a flat AI subscription (ChatGPT Plus, Claude Pro, Gemini Advanced) or pay-as-you-go API access is cheaper for your usage. Enter your daily messages and token sizes to see the monthly cost both ways in USD and LKR, plus the break-even messages per day.
- [AI System Prompt Generator — ChatGPT, Claude & Gemini](https://induwara.lk/tools/ai-system-prompt-generator) — Turn a short form into a structured system prompt, role, task, tone, output format, guardrails and few-shot examples, for ChatGPT Custom Instructions, a Custom GPT, or the Claude, OpenAI or Gemini system field. Generic Markdown or Claude XML style, with a live preview and copy/download. Runs entirely in your browser; nothing is uploaded, no AI rewriting.
- [AI Temperature & Top-p Sampling Visualizer](https://induwara.lk/tools/ai-temperature-calculator) — Interactive visualizer for LLM temperature, top-p (nucleus), and top-k sampling. Drag the sliders and watch the next-token softmax probabilities sharpen, flatten, and truncate, with the exact math token by token. Runs in your browser, no API key, sources cited.
- [AI Text Chunker (Split Text for RAG & Embeddings)](https://induwara.lk/tools/ai-text-chunker) — Split long text into token-sized, optionally overlapping chunks for RAG and embedding pipelines. Runs OpenAI's tiktoken counter in your browser, shows each chunk's exact token count, and exports JSON or JSONL. No upload, no signup.
- [AI Text Embedding Generator (Free, Browser-Based)](https://induwara.lk/tools/ai-embedding-generator) — Turn any text into its 384-dimension embedding vector with all-MiniLM-L6-v2, no API key, no signup. See the full vector, copy or download it as JSON, CSV, or a Python list, and get the cosine similarity between two texts for semantic search, RAG, and clustering.
- [AI Text Similarity Checker — Semantic, Server-Side](https://induwara.lk/tools/ai-text-similarity-checker) — Compare two texts and get a 0–100% semantic similarity score from sentence-transformer embeddings, catches paraphrases that word-overlap checkers miss. Server-side inference, lexical Jaccard cross-check, no signup, sources cited.
- [AI Text Summarizer — Free, No Signup](https://induwara.lk/tools/ai-text-summarizer) — Summarize long articles, papers, or meeting notes into a TL;DR paragraph plus key bullet points. A DistilBART model runs server-side alongside a deterministic TextRank pass. No API key, no signup, sources cited.
- [AI Text-to-Speech (TTS) API Comparison](https://induwara.lk/tools/ai-text-to-speech-comparison) — Side-by-side comparison of the major hosted text-to-speech (TTS) APIs, ElevenLabs, OpenAI, Google Cloud, Azure AI Speech, Amazon Polly, PlayHT, Murf, Cartesia and Deepgram Aura, by price per character, voice cloning, streaming latency, language coverage, output formats, commercial-use terms and published naturalness. Pick your providers, enter your monthly volume in characters, words or minutes, and rank them by projected cost. Every figure cites the vendor source.
- [AI Text-to-Speech (TTS) Cost Calculator](https://induwara.lk/tools/ai-tts-cost-calculator) — Compare AI text-to-speech costs in USD and LKR across OpenAI TTS, ElevenLabs, Google Cloud TTS, Azure Neural, Amazon Polly, Deepgram Aura, Cartesia Sonic, and PlayHT. Enter characters or audio minutes per month and a quality tier; the cheapest supported provider is highlighted, free-tier allowances applied, and ElevenLabs auto-upgrades to the cheapest plan that covers your volume.
- [AI Thinking Budget Calculator](https://induwara.lk/tools/ai-thinking-budget-calculator) — See the valid thinking-budget range each reasoning model accepts, Gemini 2.5 thinkingBudget, Claude budget_tokens, GPT-5/o-series reasoning_effort, then price the per-request and monthly cost of your setting, since thinking tokens are billed as output. Runs entirely in your browser.
- [AI Token Counter — GPT, Claude, Gemini](https://induwara.lk/tools/ai-token-counter) — Count tokens for any text against GPT-5, GPT-4o, Claude 4.x, Gemini 3, and Llama 4. See how much of each model's context window you'll use before sending. Runs entirely in your browser, no signup, sources cited.
- [AI Tokenizer Visualizer — See How Text Becomes Tokens](https://induwara.lk/tools/ai-tokenizer-visualizer) — Paste any text and watch it split into the exact tokens GPT-4o, GPT-5 and GPT-4 see, per-token IDs, colour-coded chips, and encoding compare, all in your browser with no signup.
- [AI Tokens to Words Converter](https://induwara.lk/tools/ai-tokens-to-words-converter) — Convert tokens to words, words to tokens, and characters for GPT, Claude, Gemini and Llama. See reading time, A4 pages, context-window use, and an approximate API cost in USD and LKR.
- [AI Tool-Use / Function-Calling Token Cost Calculator](https://induwara.lk/tools/ai-tool-use-token-cost-calculator) — Estimate the hidden token cost of re-sending tool/function definitions on every LLM API call, per model, with prompt-caching and schema-trimming savings.
- [AI Top-k Accuracy Calculator](https://induwara.lk/tools/ai-top-k-accuracy-calculator) — Compute classification top-1 through top-k accuracy from a pasted table of ranked predictions or raw class scores. Reports the exact hit count, a full top-1…top-k ladder with marginal gains, and the samples missed at k. Mirrors scikit-learn's top_k_accuracy_score and runs entirely in your browser.
- [AI Top-p & Top-k Sampling Calculator](https://induwara.lk/tools/ai-top-p-top-k-sampling-calculator) — Interactive calculator for LLM top-k and top-p (nucleus) sampling. Drag top_k or top_p on a next-token distribution and watch which candidates survive, get zeroed, and renormalize, with the exact math token by token. Runs in your browser, no API key, sources cited.
- [AI Toxicity Detector — Check Text for Toxic & Offensive Language](https://induwara.lk/tools/ai-toxicity-detector) — Score any English comment or message across the six Jigsaw toxicity categories, toxic, severe toxic, obscene, threat, insult, identity hate. unitary/toxic-bert runs server-side, a transparent lexical heuristic cross-checks it. No signup, no model download, nothing stored, sources cited.
- [AI Train/Test/Validation Split Calculator](https://induwara.lk/tools/ai-train-test-split-calculator) — Turn a dataset size and split ratio into the exact integer sample counts for a train/test split, a three-way train/validation/test split, or k-fold cross-validation. Uses scikit-learn's own rounding so the counts match train_test_split and KFold.
- [AI Training Steps & Epochs Calculator](https://induwara.lk/tools/ai-training-steps-calculator) — Compute optimizer steps per epoch, total training steps for max_steps, global batch size, forward/backward passes, approximate tokens seen and warmup steps from your dataset size, per-device batch, GPU count, gradient accumulation and epochs, counted exactly the way the Hugging Face Trainer counts them, with drop_last handling and a copy-ready TrainingArguments snippet. Runs entirely in your browser.
- [AI Transcription (Speech-to-Text) API Cost Calculator](https://induwara.lk/tools/ai-transcription-cost-calculator) — Estimate what it costs to transcribe audio with the major speech-to-text APIs, OpenAI Whisper, Deepgram Nova, AssemblyAI Best and Nano, Google Cloud Speech-to-Text, and Azure AI Speech. Enter a duration and get a side-by-side per-provider comparison in USD and LKR, with each vendor's billing-rounding rule, free tier, effective cost per hour, and a monthly-to-annual projection.
- [AI Translation API Comparison](https://induwara.lk/tools/ai-translation-comparison) — Side-by-side comparison of the major machine-translation and LLM-as-translator APIs, DeepL, Google Cloud Translation, OpenAI, Anthropic Claude, Microsoft Azure Translator, Amazon Translate, DeepSeek and ModernMT/Lara, by price per million characters, language coverage, glossary and document support, custom/adaptive models, free tier and commercial-use terms. Pick your providers, enter your monthly volume in characters or words, and rank them by projected cost. Every figure cites the vendor source.
- [AI Translation Cost Calculator](https://induwara.lk/tools/ai-translation-cost-calculator) — Estimate and compare the USD and LKR cost of machine-translating text across Google, DeepL, Amazon, Azure, and GPT-4o mini, with free tiers applied.
- [AI Translator (Sinhala, Tamil, English + 200 Languages)](https://induwara.lk/tools/ai-translator) — Translate English ↔ Sinhala, English ↔ Tamil, and 50+ other language pairs in your browser. Powered by Meta's NLLB-200 (no-language-left-behind) model via transformers.js, no signup, no upload, no character limits, sources cited.
- [AI V-Measure Calculator (Homogeneity, Completeness & V-Measure)](https://induwara.lk/tools/ai-v-measure-calculator) — Paste two label columns, ground-truth classes and predicted cluster IDs, to get the homogeneity, completeness and V-measure of a clustering, plus the full conditional-entropy working and the contingency table. Runs entirely in your browser and matches scikit-learn's homogeneity_completeness_v_measure.
- [AI Vector Database Comparison](https://induwara.lk/tools/ai-vector-database-comparison) — Compare the major vector databases, Pinecone, Weaviate, Qdrant, Milvus/Zilliz, Chroma, pgvector, Redis and MongoDB Atlas, on free tier, license, hosting model, max dimensions, index types (HNSW/IVF/DiskANN) and hybrid search. Pick 2–6, sort any column, and read a cited 'which to choose' verdict. Free, no signup.
- [AI Vector Database Storage & RAM Calculator](https://induwara.lk/tools/ai-vector-storage-calculator) — Calculate disk, RAM, and monthly managed-hosting cost for vector embeddings across Pinecone, Qdrant, Weaviate, and self-hosted pgvector, with float32, int8, and binary quantization comparisons. Verified against Qdrant's 1.5× capacity rule.
- [AI Video Generation Cost Calculator (USD + LKR)](https://induwara.lk/tools/ai-video-generation-cost-calculator) — Compare the cost of generating AI video across Sora 2, Veo 3, Runway Gen-4, Kling, Luma, and Pika, per-second, per-clip, and monthly totals in USD and LKR, every price sourced.
- [AI Video Generator Comparison (2026)](https://induwara.lk/tools/ai-video-generator-comparison) — Compare Sora 2, Veo 3, Runway, Kling, Pika, Luma, Hailuo, Firefly and Stable Video side by side, estimated cost per 5-second clip, max clip length, resolution, native audio, commercial use, API and free tier. Free, sources cited.
- [AI Video Prompt Generator (Sora, Veo, Runway, Kling)](https://induwara.lk/tools/ai-video-prompt-generator) — A free browser-only builder that turns simple fields into copy-ready cinematic prompts formatted for Sora, Veo, Runway, Kling, Luma and Pika, with per-model syntax notes and negative-prompt handling.
- [AI Video Token & Cost Calculator](https://induwara.lk/tools/ai-video-token-cost-calculator) — Estimate how many input tokens a video costs when you send it into a multimodal LLM, Gemini's native per-second tokenization versus frame-sampling into GPT-4o and Claude, priced per video and per month in USD and LKR. Runs in your browser; no video is uploaded.
- [AI Vision Token & Image Cost Calculator](https://induwara.lk/tools/ai-vision-token-cost-calculator) — Calculate how many tokens an image costs on GPT-4o, GPT-4o mini, Claude, and Gemini from its pixel dimensions, plus the per-image and total cost in USD and LKR, side by side. Runs entirely in your browser; the image is never uploaded.
- [AI Voice Agent Cost Calculator — Per-Minute & Monthly](https://induwara.lk/tools/ai-voice-agent-cost-calculator) — Estimate the real per-minute and monthly cost of a cascaded AI voice agent, chaining speech-to-text, an LLM, text-to-speech, optional Twilio telephony and a Vapi/Retell platform fee. Breaks the blended cost down by layer so you see which dominates, in USD and LKR. Runs in your browser, rates cited.
- [AI Voice Agent Platform Comparison](https://induwara.lk/tools/ai-voice-agent-comparison) — Compare AI voice-agent platforms, Vapi, Retell, Bland, ElevenLabs, LiveKit, Synthflow, Play.ai and Deepgram, by estimated monthly cost, built-in vs. bring-your-own telephony, self-host support and language coverage. Enter your minutes and constraints; the tool ranks them and names a best fit. Free, no signup, sources cited.
- [AI Wasserstein Distance Calculator (Earth Mover's Distance)](https://induwara.lk/tools/ai-wasserstein-distance-calculator) — Compute the Wasserstein-1 distance (Earth Mover's Distance) between two 1-D distributions or samples, entirely in the browser, the drift metric that stays finite when KL divergence blows up. Full per-interval working, a CDF chart, and a quantile cross-check; matches scipy.stats.wasserstein_distance.
- [AI Web Search / Grounding Cost Calculator](https://induwara.lk/tools/ai-web-search-cost-calculator) — Estimate the true monthly cost of LLM web search, the per-search/grounding tool fee plus the retrieved-content input tokens, across Claude, GPT, Gemini and Sonar, with a cheapest-provider comparison.
- [AI Website Builder — Free Online Website Generator from a Text Prompt](https://induwara.lk/tools/ai-website-builder) — Score the prompt before you spend a build on it. Answer nine questions and this scores your website brief out of 100, shows every decision you are still leaving to the AI, and composes a build-ready brief you can send straight to the free builder. No signup.
- [AI Website Builder Comparison — v0 vs Bolt vs Lovable & more](https://induwara.lk/tools/ai-website-builder-comparison) — Compare 8 leading AI website builders, v0, Bolt.new, Lovable, Framer, Durable, Wix, Hostinger and 10Web, by price, free tier, code export, custom domain, hosting and store. Set your budget and needs, get the best fit. Prices in USD with an approximate LKR figure, sources cited.
- [AI Zero-Shot Image Classifier — Free, No API Key](https://induwara.lk/tools/ai-zero-shot-image-classifier) — Upload an image and type your own list of labels, CLIP ranks how well the picture matches each one, with no training data, no API key on your side, and no signup. Classify into custom categories the fixed classifiers can't, right in the browser. Inference runs server-side and your image is never stored.
- [AI Zero-Shot Text Classifier — Free, Server-Side](https://induwara.lk/tools/ai-zero-shot-classifier) — Classify any text into your own custom labels, no training data, no API key on your side, no signup. A distilled BART-MNLI NLI model runs server-side via Hugging Face using the entailment-NLI method. Single- and multi-label modes, sources cited.
- [AI/LLM Training Time & Cost Calculator](https://induwara.lk/tools/ai-training-time-calculator) — Estimate the wall-clock days, GPU-hours, and cloud cost to train a language model from its parameter count and token budget, using the standard 6ND compute law and a chosen GPU's throughput. Includes a GPT-3 cross-check and a same-run-on-other-GPUs comparison.
- [Anthropic (Claude) to Gemini API Request Converter](https://induwara.lk/tools/ai-anthropic-to-gemini-converter) — Convert an Anthropic (Claude) Messages API request into the equivalent Google Gemini generateContent request (and back) with a field-by-field mapping table and ready-to-run cURL, Python and Node/TS snippets, fully in-browser, no key.
- [Anthropic (Claude) to OpenAI API Converter](https://induwara.lk/tools/ai-anthropic-to-openai-converter) — Convert an Anthropic Messages API request or response into the equivalent OpenAI Chat Completions JSON, system, tool_use, tool_result, tool_choice, stop_reason and usage mapped field by field, with a live mapping table. Fully in-browser, no keys.
- [Balanced Accuracy Calculator](https://induwara.lk/tools/balanced-accuracy-calculator) — Compute balanced accuracy (the macro-average of per-class recall) from a binary confusion matrix or per-class results, contrasted against plain accuracy, with sensitivity, specificity and the adjusted chance-corrected score. Matches scikit-learn, runs entirely in your browser.
- [Bayes' Theorem Calculator (Posterior Probability, Step by Step)](https://induwara.lk/tools/bayes-theorem-calculator) — Compute the posterior probability P(A|B) from a prior and the true-positive and false-positive rates using Bayes' theorem. Shows the evidence P(B), the complement, a fully substituted formula and a probability tree, the fast way to settle the false-positive paradox. Runs in your browser.
- [BLEU Score Calculator (n-gram Precision, Brevity Penalty)](https://induwara.lk/tools/bleu-score-calculator) — Calculate the BLEU score for a candidate translation against one or more references, entirely in your browser. Shows the modified n-gram precisions p1–p4, the brevity penalty, and the clipped match counts. Matches NLTK sentence_bleu, no signup.
- [BM25 Score Calculator (Okapi BM25)](https://induwara.lk/tools/bm25-score-calculator) — Compute and rank Okapi BM25 relevance scores between a query and a corpus in your browser, with a full per-term IDF/TF breakdown so every digit is auditable. Supports the Lucene non-negative and classic RSJ IDF variants and tunable k1/b.
- [Brier Score Calculator (with Skill Score & Formula)](https://induwara.lk/tools/ai-brier-score-calculator) — Compute the Brier score and Brier Skill Score for probabilistic predictions. Paste forecast probabilities and 0/1 outcomes to get the mean-squared-error of the probabilities, the skill score versus a baseline, the exact formula and a per-pair breakdown. Matches scikit-learn, runs in the browser.
- [Calinski–Harabasz Index Calculator](https://induwara.lk/tools/calinski-harabasz-index-calculator) — Compute the Calinski–Harabasz index (variance ratio criterion) of a clustering from raw data points and labels. Get the overall score, the BGSS/WGSS dispersion breakdown, per-cluster centroids and contributions, and the (N−k)/(k−1) scaling factor. Matches scikit-learn calinski_harabasz_score, runs entirely in your browser.
- [Canberra Distance Calculator](https://induwara.lk/tools/canberra-distance-calculator) — Compute the Canberra distance, a weighted L1 metric that divides each coordinate difference by the sum of the two magnitudes, between two numeric vectors of any length. Shows the full per-coordinate working, the normalized value, the 0/0 = 0 zero convention, and matches scipy.spatial.distance.canberra, entirely in your browser.
- [Character Error Rate (CER) Calculator](https://induwara.lk/tools/character-error-rate-calculator) — Compute the Character Error Rate between a reference and a predicted transcription or OCR output, with S/D/I breakdown and a colour-coded character diff, entirely in the browser.
- [Chebyshev Distance Calculator](https://induwara.lk/tools/chebyshev-distance-calculator) — Compute the Chebyshev (L∞) distance between two points or two numeric vectors of any dimension, the largest single coordinate-wise difference, a.k.a. the chessboard king-move metric. Shows the dominant dimension plus Manhattan (L1), Euclidean (L2) and Minkowski (p=3) for comparison, and matches SciPy and scikit-learn, entirely in your browser.
- [chrF Score Calculator (Character n-gram F-score)](https://induwara.lk/tools/chrf-score-calculator) — Calculate the chrF (character n-gram F-score) of a candidate translation against one or more references, entirely in your browser. Shows per-order character precision and recall, the averaged chrP and chrR, and the β-weighted chrF2, matching the standard sacreBLEU configuration (char order 6, β=2, whitespace stripped). No signup.
- [CNN Output Size Calculator (Conv, Pooling & Transposed Conv)](https://induwara.lk/tools/cnn-output-size-calculator) — Compute the exact output size, tensor shape, parameter count and FLOPs of a Conv2d, pooling or transposed-conv layer from kernel, stride, padding and dilation. Chain layers in stack mode and copy a ready PyTorch/Keras snippet. Runs in your browser.
- [CNN Receptive Field Calculator](https://induwara.lk/tools/cnn-receptive-field-calculator) — Compute the receptive field, jump (effective stride) and output size at every layer of a CNN from your stack of conv/pool layers (kernel, stride, padding, dilation). Closed-form verified, runs entirely in your browser.
- [Cohen's Kappa Calculator (Inter-Rater Reliability)](https://induwara.lk/tools/cohens-kappa-calculator) — Enter a two-rater agreement matrix and get Cohen's kappa (κ) with observed vs chance agreement, a 95% confidence interval, optional linear/quadratic weighted kappa for ordinal scales, and the Landis & Koch strength-of-agreement band. Runs in your browser, no signup.
- [Concordance Index (C-index) Calculator](https://induwara.lk/tools/ai-concordance-index-calculator) — Compute Harrell's Concordance Index (C-index / C-statistic) for binary or right-censored survival data. Reports the C-index plus the concordant, discordant, tied and comparable-pair breakdown, matching lifelines.utils.concordance_index, entirely in your browser.
- [Confusion Matrix Calculator (Precision, Recall, F1 & MCC)](https://induwara.lk/tools/confusion-matrix-calculator) — Enter the four cells of a binary confusion matrix (TP, FP, FN, TN) and instantly get accuracy, precision, recall, specificity, F1, F-beta, balanced accuracy and the Matthews correlation coefficient, each shown with its exact formula. Runs in your browser, no signup.
- [Cosine Similarity Calculator (Vectors & Text)](https://induwara.lk/tools/cosine-similarity-calculator) — Compute the cosine similarity, cosine distance, and angle between two numeric vectors or two short texts, with the full dot-product and magnitude working. Matches scikit-learn, runs entirely in the browser.
- [Cross-Entropy Loss Calculator](https://induwara.lk/tools/cross-entropy-loss-calculator) — Compute cross-entropy (log) loss for binary and multi-class classification from labels and predicted probabilities or logits. Shows per-sample loss, the mean log-loss metric, perplexity and full step-by-step working, matches scikit-learn log_loss and PyTorch CrossEntropyLoss, entirely in the browser.
- [Davies–Bouldin Index Calculator](https://induwara.lk/tools/davies-bouldin-index-calculator) — Compute the Davies–Bouldin Index (DBI) of a clustering from raw data points and labels. Get the overall score, per-cluster dispersion and centroids, each cluster's worst rival Dᵢ, and the full pairwise Rᵢⱼ matrix. Matches scikit-learn davies_bouldin_score, runs entirely in your browser.
- [Dice Coefficient (Sørensen–Dice) Calculator](https://induwara.lk/tools/dice-coefficient-calculator) — Compute the Dice similarity coefficient (Sørensen–Dice index) from two sets, two binary segmentation masks, or raw TP/FP/FN counts. Shows every arithmetic step, the Dice distance, and the related Jaccard/IoU value, matched to MONAI and SciPy, entirely in your browser.
- [Dot Product Calculator (Scalar Product & Angle)](https://induwara.lk/tools/dot-product-calculator) — Compute the dot product (scalar product) of two vectors with the full element-wise breakdown, each vector's magnitude, the cosine of the angle, the angle in degrees and radians, and an orthogonality check, all in the browser, every formula shown.
- [EU AI Act Risk Classifier — Is My AI System High-Risk?](https://induwara.lk/tools/ai-eu-ai-act-risk-classifier) — Classify any AI system into the EU AI Act's risk tiers, prohibited, high-risk, limited-risk or minimal-risk, plus the GPAI track, and get the exact article citations, obligations for your role and compliance deadline. A deterministic decision tree from Regulation (EU) 2024/1689.
- [Euclidean Distance Calculator](https://induwara.lk/tools/euclidean-distance-calculator) — Compute the Euclidean (L2) distance between two points or two numeric vectors of any dimension, with the full per-dimension working. Also shows the squared Euclidean, Manhattan (L1), and Chebyshev (L∞) distances, and matches scikit-learn and NumPy, entirely in your browser.
- [Expected Calibration Error (ECE) Calculator](https://induwara.lk/tools/ai-expected-calibration-error-calculator) — Compute Expected Calibration Error and Maximum Calibration Error from prediction confidences with a per-bin reliability table and reliability diagram. Free, no signup, sources cited.
- [F-beta Score Calculator (F1, F2, F0.5)](https://induwara.lk/tools/ai-fbeta-score-calculator) — Compute the F-beta score of a binary classifier from precision & recall or from raw confusion-matrix counts (TP/FP/FN). Presets for F1, F2, and F0.5 plus any custom beta, with all three shown side by side, using the exact scikit-learn formula and cross-checked against the confusion-matrix form.
- [F1 Score Calculator (Precision, Recall & F-beta)](https://induwara.lk/tools/f1-score-calculator) — Calculate the F1 score, precision, recall and F-beta of a binary classifier from confusion-matrix counts (TP, FP, FN) or directly from precision and recall, with every step of the arithmetic shown. Matches scikit-learn, runs in your browser.
- [Feature Scaling & Normalization Calculator](https://induwara.lk/tools/ai-feature-scaling-calculator) — Paste a column of numbers and rescale it four ways, Min-Max normalization, Z-score standardization, MaxAbs, and Robust (median/IQR) scaling, with the exact scikit-learn formulas and every fitted parameter (min, max, mean, std, median, IQR) shown so you can reproduce each number by hand.
- [Fleiss' Kappa Calculator (Inter-Rater Reliability)](https://induwara.lk/tools/fleiss-kappa-calculator) — Compute Fleiss' kappa for three or more raters from a subject-by-category count matrix. Get the overall κ, observed vs chance agreement, per-category kappa, and the Landis & Koch agreement band. Runs in your browser, no signup.
- [Fowlkes-Mallows Index Calculator](https://induwara.lk/tools/fowlkes-mallows-index-calculator) — Compute the Fowlkes-Mallows Index (FMI), a clustering-quality score in [0, 1], by comparing predicted labels against ground truth, or from raw TP/FP/FN pair counts. Shows the pair-confusion counts, pairwise precision and recall, and the full working. Matches scikit-learn fowlkes_mallows_score, runs in your browser.
- [Free AI Voice Generator — Realistic Text to Speech (MP3 Download)](https://induwara.lk/tools/ai-voice-generator) — Turn text into realistic AI speech and download the MP3, free, no signup. 5 natural voices, 29 languages, and emotion effects like whisper, laugh, and pauses. Great for videos, narration, e-learning, and accessibility.
- [Gemini to Anthropic API Converter](https://induwara.lk/tools/ai-gemini-to-anthropic-converter) — Convert a Google Gemini generateContent request or response into the equivalent Anthropic Messages JSON, systemInstruction, functionCall, finishReason and usageMetadata mapped field by field into Claude's system / messages / content-block shape, fully in-browser.
- [Gemini to OpenAI API Converter](https://induwara.lk/tools/ai-gemini-to-openai-converter) — Convert a Google Gemini generateContent request or response into the equivalent OpenAI Chat Completions JSON, systemInstruction, functionCall, finishReason and usageMetadata mapped field by field, fully in-browser.
- [GGUF Quantization Size Calculator](https://induwara.lk/tools/ai-gguf-quantization-calculator) — Estimate the on-disk size of any LLM in GGUF format from its parameter count and quant type (Q2_K to Q8_0, the IQ-quants, or F16). Compare bits-per-weight and file size side by side to pick the quant that fits your RAM or VRAM before downloading. Formulas and measured llama.cpp sizes cited.
- [Gini Impurity Calculator (Decision Tree, scikit-learn)](https://induwara.lk/tools/gini-impurity-calculator) — Compute the Gini impurity of a decision-tree node from class counts or proportions, with the full 1 − Σ pₖ² working, a Shannon-entropy comparison, and the Gini gain of a candidate split. Matches scikit-learn, runs in the browser.
- [GLEU Score Calculator (Google-BLEU)](https://induwara.lk/tools/ai-gleu-score-calculator) — Calculate the GLEU score (Google-BLEU, Wu et al. 2016) between a reference and a model hypothesis, the minimum of n-gram recall and precision over 1–4 grams. Shows the counted n-grams so the number is auditable. Matches NLTK sentence_gleu, runs in your browser, no signup.
- [Gwet's AC1 Agreement Coefficient Calculator](https://induwara.lk/tools/gwet-ac1-calculator) — Compute Gwet's AC1 chance-corrected agreement coefficient from a two-rater matrix or two rating lists. Shows observed vs chance agreement, the strength-of-agreement band, and Cohen's kappa side by side so you can see the kappa paradox that AC1 fixes. Runs in your browser, no signup.
- [Hamming Distance Calculator (Binary, Text & Vectors)](https://induwara.lk/tools/hamming-distance-calculator) — Compute the Hamming distance between two equal-length binary strings, text strings, or numeric vectors, the count of positions that differ. Also shows the normalised Hamming loss, similarity, and exactly which positions mismatch, entirely in your browser.
- [Hellinger & Bhattacharyya Distance Calculator](https://induwara.lk/tools/ai-hellinger-distance-calculator) — Compute the Hellinger distance, Bhattacharyya coefficient and Bhattacharyya distance between two discrete probability distributions or two univariate Gaussians. Bounded 0-to-1 result, full per-term working, an independent cross-check, entirely in your browser.
- [Hinge Loss Calculator (SVM / Squared Hinge Loss)](https://induwara.lk/tools/ai-hinge-loss-calculator) — Compute hinge loss max(0, 1 − y·f(x)) and squared hinge loss from true labels and decision-function scores. Shows the per-sample loss table, margin violations, and mean or sum reduction, matching scikit-learn's hinge_loss. Runs entirely in your browser, no upload.
- [Huber Loss Calculator (Smooth L1 Loss)](https://induwara.lk/tools/ai-huber-loss-calculator) — Compute Huber loss L_δ(a) = 0.5·a² if |a| ≤ δ, else δ·(|a| − 0.5·δ), and the PyTorch Smooth L1 loss, from predicted and actual values. Shows the reduced loss, per-element quadratic-vs-linear region split, MSE and MAE for context, and full working, matches torch.nn.HuberLoss / SmoothL1Loss, cross-checked via the SmoothL1(β) = Huber(δ)/β identity, entirely in the browser.
- [Information Gain Calculator (Decision Tree, ID3 & C4.5)](https://induwara.lk/tools/information-gain-calculator) — Compute the information gain and gain ratio of a decision-tree split from class counts, with every intermediate entropy step shown, parent entropy, per-child entropy, weighted child entropy, split information. Matches Quinlan's ID3/C4.5, runs in the browser.
- [IoU (Intersection over Union) Calculator](https://induwara.lk/tools/ai-iou-calculator) — Compute Intersection over Union for two bounding boxes or two label sets. Returns IoU, the Dice/F1 coefficient, raw intersection and union, a threshold pass/fail verdict, and a scaled overlap diagram, entirely in your browser, sources cited.
- [Jaccard Similarity Calculator (Sets, Text & Binary)](https://induwara.lk/tools/jaccard-similarity-calculator) — Compute the Jaccard similarity coefficient and distance between two sets, text snippets, or binary vectors, with the intersection/union breakdown and the substituted formula, all in the browser. Matches scikit-learn jaccard_score.
- [Jaro–Winkler Similarity Calculator](https://induwara.lk/tools/jaro-winkler-similarity-calculator) — Compute the Jaro similarity, Jaro distance and Jaro–Winkler score between two strings, with the matching characters, transpositions, common prefix and substituted formula shown step by step, all in the browser.
- [Jensen-Shannon Divergence Calculator](https://induwara.lk/tools/ai-jensen-shannon-divergence-calculator) — Compute the Jensen–Shannon divergence and distance between two discrete probability distributions, in bits or nats, with the mixture M = ½(P+Q), both KL terms and the entropy decomposition. Symmetric, always finite, bounded 0–1, the fix for KL's asymmetry and infinities. Matches SciPy, runs in your browser.
- [Kendall's Tau Correlation Calculator](https://induwara.lk/tools/kendall-tau-correlation-calculator) — Paste two columns to get Kendall's τ-a and τ-b (rank correlation), the concordant/discordant pair breakdown, and a z-test with two-tailed p-value, with proper tie correction. Matches scipy.stats.kendalltau, runs entirely in your browser.
- [KL Divergence Calculator](https://induwara.lk/tools/ai-kl-divergence-calculator) — Compute the Kullback–Leibler divergence D(P‖Q) between two discrete probability distributions, in bits or nats, with the full per-term working. Also shows the reverse divergence D(Q‖P), cross-entropy H(P,Q) and entropy H(P), entirely in your browser, matched to SciPy.
- [Krippendorff's Alpha Calculator (Inter-Coder Reliability)](https://induwara.lk/tools/krippendorff-alpha-calculator) — Compute Krippendorff's alpha from a ratings grid for nominal, ordinal, interval or ratio data. Handles missing cells and any number of coders, and returns α with the coincidence matrix, observed vs expected disagreement, and a reliability verdict. Runs in your browser, no signup.
- [Levenshtein Distance Calculator (Edit Distance)](https://induwara.lk/tools/levenshtein-distance-calculator) — Computes the Levenshtein edit distance between two strings with a full Wagner–Fischer DP matrix and step-by-step edit operations, entirely in the browser.
- [Linear Regression Calculator](https://induwara.lk/tools/linear-regression-calculator) — Paste two columns to fit the ordinary-least-squares line of best fit ŷ = a + bx: slope, intercept, r, R², the standard error of the estimate, a slope t-test with two-tailed p-value and 95% confidence interval, a residuals table, a scatter plot, and a prediction for a new x. Matches scipy.stats.linregress, runs entirely in your browser.
- [LLM API Pricing Comparison — cheapest model for your tokens](https://induwara.lk/tools/ai-llm-api-price-comparison) — Enter your monthly input and output token volume and see the exact per-month API cost of 30+ text models, GPT, Claude, Gemini, Grok, DeepSeek, Mistral and Llama, ranked cheapest-first, with a USD→LKR toggle. Free, no signup, official prices cited.
- [LLM API Usage Tier & Rate-Limit Lookup](https://induwara.lk/tools/ai-api-usage-tier-lookup) — Look up the OpenAI and Anthropic paid usage-tier ladders, the cumulative spend/deposit (and OpenAI account-age) needed for each tier, the monthly spend cap it unlocks, and the per-model RPM/TPM rate limits. Tells you which tier you're in and exactly how much more to spend to lift a 429.
- [LLM GPU Memory (VRAM) Calculator](https://induwara.lk/tools/ai-llm-vram-calculator) — Estimate the GPU VRAM needed to run or fine-tune any open LLM (Llama 3, Mistral, Qwen, Gemma, DeepSeek) at a given precision, context, and batch size, and check whether it fits your GPU. Formulas cited, runs in your browser.
- [LLM Inference Speed (Tokens per Second) Calculator](https://induwara.lk/tools/ai-inference-speed-calculator) — Estimate how fast an LLM will run on a given GPU, decode tokens/second, prefill throughput, time-to-first-token, and total generation time, from model size, quantization, and published memory bandwidth. Formulas and GPU specs cited.
- [LLM KV Cache Memory Calculator](https://induwara.lk/tools/ai-kv-cache-calculator) — Calculate the GPU KV-cache memory an LLM uses per token, per sequence, and in total from its architecture, context length, batch size and precision, plus how many concurrent requests fit a given GPU. Formula cited, runs in your browser.
- [LLM Serving Concurrency & GPU Replica Calculator](https://induwara.lk/tools/ai-llm-serving-concurrency-calculator) — Estimate how many concurrent requests one GPU can serve, its sustainable QPS and per-request latency, and the GPU replicas you need for a target load, concurrent users, QPS, or requests/minute. Tied together by Little's Law so concurrency, throughput and latency stay consistent. Free, sources cited.
- [LLM Training Compute (FLOPs) Calculator](https://induwara.lk/tools/ai-training-compute-calculator) — Estimate the FLOPs, petaFLOP/s-days, GPU-hours, and dollar cost to train a transformer LLM from scratch with the 6ND rule, and check the Chinchilla compute-optimal token count (20 tokens per parameter). Reproduces GPT-3's published compute. Sources cited, runs in your browser.
- [LLM Training Memory (VRAM) Calculator](https://induwara.lk/tools/ai-training-memory-calculator) — Estimate the GPU VRAM needed to train or fully fine-tune a transformer LLM, split into weights, gradients, Adam optimizer states, and activations, then shard across GPUs with ZeRO/data-parallel and check whether it fits an RTX 4090, A100, or H100. Formulas cited (EleutherAI, ZeRO, Korthikanti), runs in your browser.
- [Local LLM Runtime Comparison (Ollama vs LM Studio vs llama.cpp vs vLLM)](https://induwara.lk/tools/ai-local-llm-runtime-comparison) — Compare Ollama, LM Studio, llama.cpp, vLLM, Jan, GPT4All, KoboldCpp and text-generation-webui to pick the best software for running open LLMs on your own machine. Filter by OS, GPU, interface and experience level for a deterministic, sourced recommendation.
- [Mac / Apple Silicon LLM Calculator (Can I Run This Model?)](https://induwara.lk/tools/ai-apple-silicon-llm-calculator) — Check whether an open LLM (Llama, Mistral, Qwen, Gemma, DeepSeek, Phi) runs on your Apple Silicon Mac. Models the macOS unified-memory GPU cap, KV cache, and quant size to give a verdict, the biggest model that fits, and an estimated tokens/sec. Free, no signup.
- [Macro, Micro & Weighted F1 Score Calculator (Multiclass)](https://induwara.lk/tools/multiclass-f1-calculator) — Enter a multiclass confusion matrix (up to 10 classes) and get per-class precision, recall and F1 plus macro, micro and weighted F1 and accuracy, each average shown with its working so you can see why they differ. Matches scikit-learn, runs entirely in your browser.
- [Mahalanobis Distance Calculator](https://induwara.lk/tools/mahalanobis-distance-calculator) — Compute the Mahalanobis distance of a point from a multivariate dataset (or between two points), accounting for feature correlation via the inverse covariance matrix. Shows D, D², the mean, covariance and inverse, a chi-square outlier verdict with p-value, and a Euclidean comparison, matched to scikit-learn and SciPy, entirely in your browser.
- [Manhattan Distance Calculator](https://induwara.lk/tools/manhattan-distance-calculator) — Compute the Manhattan (L1 / taxicab / city-block) distance between two points or two numeric vectors of any dimension, with the full per-dimension working. Also shows the Euclidean (L2) and Chebyshev (L∞) distances, and matches scikit-learn and SciPy, entirely in your browser.
- [Matthews Correlation Coefficient (MCC) Calculator](https://induwara.lk/tools/matthews-correlation-coefficient-calculator) — Compute the Matthews Correlation Coefficient from a confusion matrix or two label columns, with formula breakdown and imbalanced-data interpretation, entirely in the browser.
- [McNemar's Test Calculator — paired 2×2 significance test](https://induwara.lk/tools/mcnemar-test-calculator) — Run McNemar's test on a 2×2 table of paired binary outcomes to check whether two measures on the same subjects differ significantly, two classifiers on one test set, two diagnostic tests on the same patients, or a before/after change. Get the chi-square statistic, the exact binomial p-value, discordant-pair counts, an odds ratio, and a plain-English verdict.
- [Mean Average Precision (mAP) Calculator](https://induwara.lk/tools/ai-mean-average-precision-calculator) — Compute Average Precision (AP) and mean Average Precision (mAP) from a ranked TP/FP detection list, with the full precision-recall table and both 11-point and all-point interpolation, entirely in your browser.
- [Mean Reciprocal Rank (MRR) Calculator](https://induwara.lk/tools/ai-mean-reciprocal-rank-calculator) — Compute the Mean Reciprocal Rank (MRR) of a search, QA, recommender or RAG retrieval system. Enter the first-hit rank per query or 0/1 relevance lists and get MRR with every reciprocal rank and the full arithmetic shown. The IR / TREC definition, runs entirely in the browser.
- [METEOR Score Calculator (Alignment, Fmean, Chunk Penalty)](https://induwara.lk/tools/meteor-score-calculator) — Calculate the METEOR score for a candidate translation against a reference, entirely in your browser. Shows unigram matches, precision, recall, the recall-weighted Fmean, the chunk-based fragmentation penalty, and the aligned tokens. Matches NLTK single_meteor_score, no signup.
- [Minkowski Distance Calculator](https://induwara.lk/tools/minkowski-distance-calculator) — Compute the Minkowski distance (the generalized Lₚ metric) between two numeric vectors of any dimension, for any order p ≥ 1, with the full per-dimension working. Shows the Manhattan (p=1), Euclidean (p=2), and Chebyshev (p→∞) special cases side by side, and matches scikit-learn and SciPy, entirely in your browser.
- [NDCG Calculator (Normalized Discounted Cumulative Gain)](https://induwara.lk/tools/ndcg-calculator) — Compute DCG, IDCG and NDCG@k for a ranked list of relevance scores, with every position's gain and log discount shown. Supports linear and exponential (2^rel − 1) gain and an optional rank cutoff k. Matches scikit-learn ndcg_score, runs entirely in the browser.
- [NIST Score Calculator (Machine-Translation Metric)](https://induwara.lk/tools/nist-score-calculator) — Calculate the NIST machine-translation score for a candidate translation against one or more references, entirely in your browser. Shows the information-weighted precision per n-gram order, the NIST brevity penalty, and every matched n-gram's weight. Matches NLTK sentence_nist, no signup.
- [Ollama Modelfile Generator — build a custom model](https://induwara.lk/tools/ai-ollama-modelfile-generator) — Turn a base model, system prompt and sampling parameters into a valid Ollama Modelfile, plus the exact ollama create and ollama run commands. Fully client-side from the official spec, no account, no upload.
- [OpenAI to Anthropic (Claude) API Converter](https://induwara.lk/tools/ai-openai-to-anthropic-converter) — Convert an OpenAI Chat Completions request into the equivalent Anthropic Messages API request (and back) with a field-by-field mapping table and ready-to-run cURL, Python and Node/TS snippets, fully in-browser.
- [OpenAI to Gemini API Request Converter](https://induwara.lk/tools/ai-openai-to-gemini-converter) — Convert an OpenAI Chat Completions request into the equivalent Google Gemini generateContent request (and back) with a field-by-field mapping table and ready-to-run cURL, Python and Node/TS snippets, fully in-browser.
- [OpenAI-Compatible API Base URL Cheatsheet](https://induwara.lk/tools/ai-openai-compatible-base-url-cheatsheet) — Copy-paste the exact base_url, auth header and a working OpenAI SDK snippet (Python, Node, curl) for 15 LLM providers with OpenAI-compatible endpoints, OpenAI, Azure, Anthropic, Gemini, Groq, Together, Fireworks, DeepSeek, Mistral, xAI, OpenRouter, Perplexity, plus Ollama, LM Studio and vLLM. No signup, keys never leave your machine, official docs cited per row.
- [Pearson Correlation Coefficient Calculator](https://induwara.lk/tools/pearson-correlation-calculator) — Paste two columns to get the Pearson correlation r, r², covariance, a t-test with two-tailed p-value, and a scatter plot, with full step-by-step working. Matches scipy.stats.pearsonr, runs entirely in your browser.
- [Perplexity Calculator (Language Model)](https://induwara.lk/tools/ai-perplexity-calculator) — Compute language-model perplexity from token probabilities, cross-entropy loss, or log-likelihood, with nats and bits-per-token conversions. Step-by-step, matches PyTorch, runs entirely in the browser.
- [Precision@K and Recall@K Calculator (with F1@K)](https://induwara.lk/tools/ai-precision-recall-at-k-calculator) — Compute Precision@K, Recall@K, F1@K and Hit Rate@K for a retriever, search ranker or RAG pipeline, from a ranked 0/1 relevance list or from raw counts. Shows a per-K breakdown and every step of the arithmetic, cross-checked and run entirely in your browser.
- [RAG Chunk Size & Overlap Calculator](https://induwara.lk/tools/ai-rag-chunk-size-calculator) — Plan a RAG embedding pipeline before you spend a cent: enter a document length, chunk size and overlap, and instantly see the chunk count, tokens duplicated by overlap, total tokens embedded, embedding cost in USD across OpenAI, Cohere and Voyage models, the vector-store size for float32/float16/int8, and the top-k retrieval prompt budget. Pure client-side sliding-window math, no keys, no upload.
- [Regression Metrics Calculator (MAE, MSE, RMSE, R², MAPE)](https://induwara.lk/tools/ai-regression-metrics-calculator) — Paste your model's predicted values and the actual values to instantly get MAE, MSE, RMSE, R², Adjusted R² and MAPE, each with its formula and a full residual table. Matches scikit-learn, runs in your browser, no signup.
- [ROC Curve & AUC Calculator (from Labels & Scores)](https://induwara.lk/tools/ai-roc-auc-calculator) — Paste binary labels and predicted scores to get the ROC curve, AUC, Gini coefficient, and the Youden-optimal threshold instantly, cross-checked against scikit-learn's roc_auc_score, entirely in your browser.
- [ROUGE Score Calculator (ROUGE-1, ROUGE-2, ROUGE-L, Lsum)](https://induwara.lk/tools/rouge-score-calculator) — Calculate ROUGE-1, ROUGE-2, ROUGE-L and ROUGE-Lsum precision, recall and F1 between a generated summary and one or more references, entirely in your browser. Shows matched n-grams and the longest common subsequence. Matches Google rouge-score, no signup.
- [Scaled Dot-Product Attention Calculator](https://induwara.lk/tools/ai-attention-score-calculator) — Compute scaled dot-product self-attention step by step from your own Query, Key, and Value matrices, raw QKᵀ scores, √dₖ scaling, softmax attention weights, and output context vectors, with a per-row arithmetic trace. Runs entirely in your browser.
- [Shannon Entropy & Information Gain Calculator](https://induwara.lk/tools/shannon-entropy-calculator) — Compute Shannon entropy H(X) for any discrete distribution, from counts or probabilities, in bits, nats, or dits, with full per-term working, maximum entropy and efficiency. Also computes decision-tree information gain (ID3), all in your browser, matched to SciPy.
- [Sigmoid Function Calculator (σ, Derivative & Logit)](https://induwara.lk/tools/sigmoid-function-calculator) — Compute the logistic sigmoid σ(x) = 1/(1+e⁻ˣ) for one or more values, plus its derivative σ′(x) and its inverse (the logit), with a numerically-stable step-by-step breakdown and a plotted S-curve. Verified against PyTorch, entirely in the browser.
- [Silhouette Score Calculator](https://induwara.lk/tools/silhouette-score-calculator) — Compute the silhouette score (silhouette coefficient) of a clustering from raw data points and labels. Get the overall score, per-cluster means, and the full per-sample a(i)/b(i)/s(i) working, with misassigned points flagged. Matches scikit-learn silhouette_score, runs entirely in your browser.
- [Sinhala & Tamil LLM (AI) Cost Calculator](https://induwara.lk/tools/sinhala-tamil-ai-cost-calculator) — Measure the token tax: Sinhala and Tamil fragment into far more tokens than English, so LLM API calls cost more. Tokenize real text with the exact GPT-4o/GPT-5 tokenizer in your browser, see the per-word tax ratio versus English, and project a monthly OpenAI, Claude, Gemini or Llama bill in USD and LKR for an app serving Sri Lankan users, with a cheapest-model comparison. No signup, no upload, sources cited.
- [SLBFE Employment Contract Checker — AI Contract Review for Migrant Workers](https://induwara.lk/tools/slbfe-employment-contract-checker) — AI-powered employment contract checker for Sri Lankan migrant workers. Paste your contract and get a plain-language review: salary check, red flags, SLBFE minimum standards comparison, and Sinhala summary. Free, private, no signup.
- [Small Language Model (SLM) Comparison](https://induwara.lk/tools/ai-small-language-model-comparison) — Compare small, self-hostable open-weight LLMs, Llama 3.2, Gemma 3, Qwen3, Phi-4-mini, SmolLM2, Ministral, IBM Granite and Falcon 3, by parameters, context window, license and modality. Enter your RAM or GPU VRAM and desired context to see which models actually fit your machine, with an estimated minimum memory and a source-cited recommendation. Free, no signup, every spec cited to the official model card.
- [Softmax Calculator (with Temperature)](https://induwara.lk/tools/softmax-calculator) — Convert a list of logits into a probability distribution with the softmax function. Adjust temperature to flatten or sharpen the result, and see each class probability, the argmax, entropy and a numerically-stable step-by-step breakdown, verified against PyTorch, entirely in the browser.
- [Spearman's Rank Correlation Calculator](https://induwara.lk/tools/spearman-correlation-calculator) — Paste two columns to get Spearman's ρ (rho), a t-test with two-tailed p-value, a strength reading, and the full rank working, with mid-rank tie correction. Matches scipy.stats.spearmanr, runs entirely in your browser.
- [Sri Lanka AI Subscription Price Calculator (LKR)](https://induwara.lk/tools/sri-lanka-ai-subscription-price-calculator) — Find the real Sri Lankan rupee price of ChatGPT Plus, Claude Pro, Gemini Advanced, GitHub Copilot and more, including the 18% digital-services VAT and the bank card forex markup you actually pay on a USD card. Compare every plan in rupees on one screen.
- [TER Score Calculator (Translation Edit Rate)](https://induwara.lk/tools/ter-score-calculator) — Calculate the Translation Edit Rate (TER) between a machine hypothesis and one or more references, entirely in your browser. Shows insertions, deletions, substitutions, block shifts, the edit breakdown, and a word-level alignment. Matches sacrebleu, no signup.
- [TF-IDF Calculator (Term Frequency–Inverse Document Frequency)](https://induwara.lk/tools/tf-idf-calculator) — Compute the full TF-IDF weighting for a small corpus, the term-frequency table, the IDF per term, and the final TF-IDF matrix, with the complete per-term working. Supports the textbook and scikit-learn smoothed variants, runs entirely in your browser.
- [Transformer Parameter Count Calculator](https://induwara.lk/tools/ai-parameter-count-calculator) — Compute the exact parameter count of a decoder-only (GPT-style) transformer from its architecture, vocab, hidden size, layers, FFN size, and head config, broken down into embedding, attention, feed-forward, and norm shares. GPT-2 124M and GPT-3 175B verified, formulas cited.
- [Tversky Index Calculator (Tversky Loss, Dice & Jaccard)](https://induwara.lk/tools/tversky-index-calculator) — Compute the Tversky index and Tversky loss from TP/FP/FN with tunable α (false-positive weight) and β (false-negative weight), and see the same prediction scored as Dice (α=β=0.5) and Jaccard/IoU (α=β=1). Runs entirely in your browser.
- [Weighted Kappa Calculator (Quadratic & Linear)](https://induwara.lk/tools/ai-weighted-kappa-calculator) — Compute Cohen's weighted kappa (κw), quadratic (QWK) or linear, from a confusion matrix or two lists of ordinal ratings. Reports κw with the Landis & Koch band, the unweighted κ for reference, and the weight and expected matrices. Matches scikit-learn's cohen_kappa_score; runs in your browser, no signup.
- [WhatsApp Business + AI Chatbot Cost Calculator](https://induwara.lk/tools/whatsapp-chatbot-cost-calculator) — Estimate the true monthly cost of a WhatsApp AI chatbot by combining Meta's per-message WhatsApp Business Platform fee (Sri Lanka rate card) with the LLM token cost of the AI replies, in USD and LKR, with a layer-by-layer breakdown.
- [Word Error Rate (WER) & CER Calculator](https://induwara.lk/tools/word-error-rate-calculator) — Paste a reference and a hypothesis transcript to get Word Error Rate, Character Error Rate, word accuracy, and a colour-coded alignment of every substitution, deletion, and insertion. NIST SCTK method, runs entirely in your browser.
- [Youden's J Index (Youden Index) Calculator](https://induwara.lk/tools/ai-youden-j-index-calculator) — Compute Youden's J statistic (J = Sensitivity + Specificity − 1) for a binary classifier or diagnostic test from a confusion matrix (TP, FN, TN, FP) or from sensitivity and specificity entered directly, with the paired false-positive rate and an interpretation band. Runs entirely in your browser, no upload.

### Text (20)

- [Case Converter — UPPERCASE, lowercase, camelCase, snake_case](https://induwara.lk/tools/case-converter) — Convert text between UPPERCASE, lowercase, Title Case, Sentence case, camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE and dot.case, all ten conversions at once, runs in your browser, no signup.
- [Duplicate Line Remover — Free Online Text Dedupe Tool](https://induwara.lk/tools/duplicate-line-remover) — Remove duplicate lines from any text. Case-sensitive, whitespace-trim, keep-first or keep-last, blank-line preservation. Order-preserving, runs entirely in your browser.
- [Find and Replace — Bulk Text Replace with Regex & Whole Word](https://induwara.lk/tools/find-and-replace) — Bulk find-and-replace on any text. Case-sensitive, whole-word, regex, and multi-rule modes with live match counts. Unicode-aware boundaries, runs entirely in your browser.
- [Keyword Density Checker — Free SEO Word Frequency Tool](https://induwara.lk/tools/keyword-density-checker) — Paste any article to instantly see word and phrase frequency, keyword density percentages, and Google keyword-stuffing warnings, fully client-side.
- [Lorem Ipsum Generator — classic, hipster & tech placeholder text](https://induwara.lk/tools/lorem-ipsum-generator) — Generate classic Lorem Ipsum, hipster ipsum, or tech-jargon placeholder text by words, sentences, or paragraphs. Deterministic seed, one-click copy, runs entirely in your browser.
- [Morse Code Translator — Text to Morse & Back, with Sound](https://induwara.lk/tools/morse-code-translator) — Translate text to International Morse code and decode Morse back to text in your browser, with audio and light playback at an adjustable speed. ITU-R M.1677-1, no signup.
- [N-gram Generator — Word & Character Bigrams, Trigrams](https://induwara.lk/tools/ai-n-gram-generator) — Generate word or character n-grams (unigrams to 5-grams) from any text with a ranked frequency table and CSV export, entirely in your browser. No signup, nothing uploaded.
- [Plagiarism Checker (Basic)](https://induwara.lk/tools/plagiarism-checker) — Compare two pieces of text and find the matching phrases with word-level n-gram overlap. Highlights reused passages in both documents, reports Jaccard similarity and one-sided containment. Runs entirely in your browser, no signup, sources cited.
- [Random Text Generator — words, sentences, names & writing prompts](https://induwara.lk/tools/random-text-generator) — Generate random English words, sentences, paragraphs, names, or writing prompts in one click. Deterministic seed, copy-ready output, five modes, international and Sri Lankan name banks included. Runs entirely in your browser, no signup.
- [Readability Checker — Flesch Reading Ease & Grade Level](https://induwara.lk/tools/readability-checker) — Paste any text and score its readability with six standard formulas, Flesch Reading Ease, Flesch-Kincaid Grade, Gunning Fog, SMOG, Coleman-Liau, and ARI, plus the target school grade and the word, sentence, and syllable stats behind every number. Runs entirely in your browser.
- [Reading Time Estimator — minutes to read any article](https://induwara.lk/tools/reading-time-estimator) — Estimate reading time for any article in seconds. Choose English prose (200 wpm), technical (130 wpm), or audiobook narration (155 wpm), or set a custom pace. Sources cited, runs entirely in your browser.
- [Reverse Text Generator — Mirror, Upside-Down & Zalgo](https://induwara.lk/tools/mirror-text-generator) — Generate reversed, mirrored, upside-down, and zalgo text for social media bios and creative posts. Unicode-aware, emoji-safe, runs entirely in your browser.
- [Singlish to Sinhala Converter (Type Sinhala in English)](https://induwara.lk/tools/singlish-to-sinhala-converter) — Convert phonetic English (Singlish) into correct Sinhala Unicode in real time, entirely in your browser, type Sinhala with a normal English keyboard, then copy-paste it anywhere.
- [Sinhala Unicode Converter (Legacy Font ↔ Unicode)](https://induwara.lk/tools/sinhala-unicode-converter) — Unicode to FM Abhaya and FM Malithi, and FM fonts back to Sinhala Unicode. Both directions in your browser. Free, no signup, nothing uploaded.
- [Sort Lines Alphabetically — Free Online Line Sorter](https://induwara.lk/tools/sort-lines) — Sort lines of text alphabetically, naturally, numerically, by length, or randomly. Ascending or descending, locale-aware, stable. Runs entirely in your browser.
- [Speech to Text — free, in-browser, no signup](https://induwara.lk/tools/speech-to-text) — Dictate any language to text using your browser's built-in speech recognition. English, Sinhala, Tamil and 30+ more, with .srt and .vtt subtitle export. Runs entirely in your browser.
- [Tamil Unicode Converter (Legacy Font ↔ Unicode)](https://induwara.lk/tools/tamil-unicode-converter) — Convert Tamil text between legacy fonts (Bamini, TSCII) and proper Tamil Unicode, both directions, entirely in your browser, old font-encoded gibberish into copy-paste-ready Unicode for eServices, WhatsApp and social media.
- [Text Diff Checker — compare two pieces of text, free online](https://induwara.lk/tools/text-diff-checker) — Compare two pieces of text side-by-side and see line-by-line and word-by-word differences highlighted. LCS-based, two-pass verified, runs entirely in your browser.
- [Text to Speech — free, in-browser, no signup](https://induwara.lk/tools/text-to-speech) — Convert text to spoken audio using your browser's built-in voices. Adjust rate, pitch, and volume, English, Sinhala, Tamil and dozens more. Runs entirely on your device, files never leave your browser.
- [URL Slug Generator — SEO-friendly slugs from any title](https://induwara.lk/tools/slug-generator) — Turn any title into a clean, SEO-friendly URL slug. Handles Sinhala, Tamil, accented Latin, and ligatures with a simplified ISO 15919 transliteration. RFC-3986 safe, runs entirely in your browser, no signup.

### Developer (45)

- [.gitignore Generator — Node, Python, VS Code & More](https://induwara.lk/tools/gitignore-generator) — Generate a clean, deduplicated .gitignore from GitHub's official templates, pick your languages, frameworks, IDEs and OS, then copy or download in one click. 100% client-side, no signup.
- [.htaccess Generator (Apache — HTTPS, 301 Redirects, Security)](https://induwara.lk/tools/htaccess-generator) — Build a valid Apache .htaccess file from toggles, force HTTPS, www/non-www canonicalisation, 301/302 redirects, custom error pages, directory password protection, GZIP, browser caching, hotlink protection and security headers. Every module block is <IfModule>-guarded. Runs entirely in your browser; nothing is uploaded.
- [AI API Error Code Lookup — OpenAI, Claude & Gemini](https://induwara.lk/tools/ai-api-error-code-lookup) — Decode any OpenAI, Anthropic (Claude), or Google Gemini API error code, 429, 529, insufficient_quota, RESOURCE_EXHAUSTED and more. See the meaning, likely cause, the fix, and whether it's safe to retry. Curated from the official docs, fully offline.
- [AI Coding Agent Rules Generator (AGENTS.md / CLAUDE.md / .cursorrules)](https://induwara.lk/tools/ai-agent-rules-generator) — Generate a clean coding-agent instructions file from one short form, AGENTS.md, CLAUDE.md, .cursor/rules, .github/copilot-instructions.md or .windsurf/rules. One shared content model, five target formats, with the exact save path and a live preview. Runs entirely in your browser; nothing is uploaded.
- [AI Function Calling / Tool Use Schema Generator](https://induwara.lk/tools/ai-function-calling-schema-generator) — Turn a named function and its typed parameters into a ready-to-paste tool / function-calling JSON definition for OpenAI, Anthropic (Claude) and Google Gemini, each provider's exact wire format, side by side, with one click to copy. No API key, no signup, runs entirely in your browser.
- [AI Structured Output JSON Schema Generator](https://induwara.lk/tools/ai-structured-output-schema-generator) — Define the JSON shape you want an LLM to return once, then copy provider-correct structured-output configs for OpenAI (response_format json_schema, strict mode), Google Gemini (responseSchema + responseMimeType) and Anthropic Claude (forced-tool JSON). Strict-mode rules applied and unsupported keywords flagged automatically. No API key, no signup, runs entirely in your browser.
- [API Key Validator & Identifier](https://induwara.lk/tools/api-key-validator) — Paste any API key, token, or secret and identify which service issued it (OpenAI, Anthropic, Google, GitHub, Stripe, AWS, Slack and 25+ more) from its prefix and shape, then check whether the format is structurally valid, prefix, length, character set, and the GitHub CRC32 checksum. Runs entirely in your browser; the key is never uploaded.
- [Color Contrast Checker (WCAG AA & AAA)](https://induwara.lk/tools/color-contrast-checker) — Check the contrast ratio between a text color and background against WCAG 2.1 AA and AAA. Instant pass/fail for normal, large, and UI text, a live preview, and one-click nudge-to-pass fixes, all in your browser.
- [cURL to Code Converter — fetch, axios, Python, Go, PHP](https://induwara.lk/tools/curl-to-code-converter) — Paste any curl command and instantly get the equivalent HTTP request code in JavaScript (fetch + axios), Python requests, Node.js, Go net/http, and PHP cURL. Parses every flag in your browser, nothing is uploaded, no signup.
- [Decompiler Comparison (Kuna vs IDA Pro, Ghidra & angr)](https://induwara.lk/tools/decompiler-comparison) — Compare Kuna, IDA Pro, Ghidra, angr, Binary Ninja, r2dec and more on measured DecBench accuracy, licence terms, architecture support and yearly cost in USD and rupees. Set your architecture, budget and must-have features; it eliminates what cannot do the job and shows the arithmetic behind the ranking. Free, no signup, every figure cited.
- [HTTP Status Code Lookup & Decision Helper](https://induwara.lk/tools/http-status-code-lookup) — Search every HTTP status code (100–599) with RFC 9110 / IANA-cited meanings and cacheable, retryable, and method-preserving flags. A built-in decision helper settles 301 vs 308, 401 vs 403, and 200 vs 201 vs 204, each answer citing its RFC section. No signup.
- [IP Subnet Calculator (CIDR / IPv4)](https://induwara.lk/tools/ip-subnet-calculator) — Enter an IPv4 address and CIDR prefix to get the network, broadcast, usable host range, subnet mask, wildcard, IP class and address type, and split a block into equal subnets. Pure bit math, all in the browser.
- [JSON Diff Checker — compare two JSON documents, free online](https://induwara.lk/tools/json-diff-checker) — Paste two JSON documents and get a structural, key-aware diff, every added, removed, and changed value by JSON Pointer path, a colour-coded tree, and a copyable RFC 6902 JSON Patch. Runs entirely in your browser, no upload.
- [JSON Schema Validator — validate JSON against a schema online](https://induwara.lk/tools/json-schema-validator) — Paste a JSON document and a JSON Schema and instantly see whether it is valid, with the exact JSON Pointer path and a plain-English reason for every error. Supports drafts 2020-12, 2019-09 and draft-07. Runs entirely in your browser, no signup, nothing uploaded.
- [llms.txt Generator — Free Spec-Compliant llms.txt Maker](https://induwara.lk/tools/llms-txt-generator) — Create a valid llms.txt file for your website, the markdown manifest that tells ChatGPT, Claude, Perplexity and other LLMs which pages to read. Fill in a name, summary and link sections, then copy or download a spec-compliant /llms.txt. Runs entirely in your browser, no signup.
- [Markdown Table Generator — build & convert GFM tables](https://induwara.lk/tools/markdown-table-generator) — Build a table in a spreadsheet-like grid and get clean, valid GitHub Flavored Markdown you can paste into a README, issue, blog, or Notion. Set per-column alignment, import CSV/TSV/Excel data, and export Markdown, HTML, or CSV. Runs entirely in your browser.
- [MASE Calculator — Mean Absolute Scaled Error](https://induwara.lk/tools/mase-calculator) — Compute the Mean Absolute Scaled Error (MASE) for forecasts, scaled against the in-sample naïve baseline, with seasonal support and a better/worse-than-naïve verdict. Shows the forecast MAE, scaling MAE, and a per-point breakdown. Sources cited, in your browser.
- [MCP Config Generator — claude_desktop_config.json & mcp.json](https://induwara.lk/tools/ai-mcp-config-generator) — Generate valid Model Context Protocol (MCP) server config for Claude Desktop, Claude Code, Cursor, VS Code and Windsurf from a simple form, correctly keyed and JSON-valid. Runs in your browser, keys never leave the page.
- [Meta Tag Generator (HTML, Open Graph & Twitter Card)](https://induwara.lk/tools/meta-tag-generator) — Turn a short form into a ready-to-paste <head> block of SEO, Open Graph and Twitter/X Card meta tags, with live Google, Facebook and X preview cards and title/description length checks. Runs entirely in your browser, every tag source-cited.
- [MIME Type Lookup (File Extension ↔ Content-Type)](https://induwara.lk/tools/mime-type-lookup) — Two-way MIME type lookup backed by the IANA Media Types registry: get the Content-Type for any file extension (.docx, .svg, .xlsx, .webp) or the extension for any media type, with copy-ready Content-Type headers and IANA-vs-de-facto labels. Runs entirely in your browser, no signup.
- [Online C Compiler — Run C Code Online, Free](https://induwara.lk/tools/online-c-compiler) — Write, compile and run C online for free, no signup. Compiled on a sandboxed server (GCC), never on ours. Ideal for students learning C.
- [Online C# Compiler — Run C# Code Online, Free](https://induwara.lk/tools/online-csharp-compiler) — Write, compile and run C# online for free, no signup. Compiled on a sandboxed server, never on ours. Quick C# testing from any device.
- [Online C++ Compiler — Run C++ Code Online, Free](https://induwara.lk/tools/online-cpp-compiler) — Write, compile and run C++ online for free, no signup. Compiled on a sandboxed server (GCC), not on ours. Perfect for learning and quick tests.
- [Online Go Compiler — Run Golang Online, Free](https://induwara.lk/tools/online-go-compiler) — Write, compile and run Go (Golang) online for free, no signup. Compiled on a sandboxed server, never on ours. Great for trying Go fast.
- [Online Java Compiler — Run Java Code Online, Free](https://induwara.lk/tools/online-java-compiler) — Write, compile and run Java online for free, no signup. Code is compiled on a sandboxed server, never on ours. Great for students and quick tests.
- [Online JavaScript Compiler & Playground](https://induwara.lk/tools/online-javascript-compiler) — Write and run JavaScript online, free, no signup. Code runs in a sandboxed worker in your own browser with live console output.
- [Online LaTeX Editor & Compiler — live preview, nothing to install](https://induwara.lk/tools/latex-editor) — Write LaTeX in the browser and see the compiled PDF as you type. Do not know LaTeX? Describe the change you want in plain English and the built-in AI writes it for you. Runs a real TeX engine in an isolated sandbox, so there is nothing to install and your document is never stored.
- [Online PHP Compiler — Run PHP Code Online, Free](https://induwara.lk/tools/online-php-compiler) — Write and run PHP online for free, no signup. Executed on a sandboxed server, never on ours. Test PHP snippets instantly from any device.
- [Online Python Compiler — Run Python 3 in Your Browser](https://induwara.lk/tools/online-python-compiler) — Write and run Python 3 online, free, no signup. Real CPython via WebAssembly runs entirely in your browser, your code is never uploaded.
- [Online R Compiler — Run R Code in Your Browser](https://induwara.lk/tools/online-r-compiler) — Write and run R online, free, no signup. Real R 4.x via WebAssembly runs entirely in your browser, vectors, summary(), data frames and base-R plots. Nothing is uploaded.
- [Online Ruby Compiler — Run Ruby Code Online, Free](https://induwara.lk/tools/online-ruby-compiler) — Write and run Ruby online for free, no signup. Executed on a sandboxed server, never on ours. Quick Ruby testing from any device.
- [Online Rust Compiler — Run Rust Code Online, Free](https://induwara.lk/tools/online-rust-compiler) — Write, compile and run Rust online for free, no signup. Compiled on a sandboxed server, never on ours. Try Rust with zero setup.
- [Online SQL Editor — Run SQLite in Your Browser](https://induwara.lk/tools/online-sql-editor) — Practise SQL with a real SQLite database that runs entirely in your browser, free, no signup, nothing uploaded. CREATE, INSERT, SELECT, JOIN.
- [Online TypeScript Compiler & Playground](https://induwara.lk/tools/online-typescript-compiler) — Write, compile and run TypeScript online, free. The TypeScript compiler runs in your browser and executes the result in a sandboxed worker.
- [OpenTIE Compatibility & Setup Checker](https://induwara.lk/tools/opentie-compatibility-checker) — Tells you in one screen whether OpenTIE, the open-source Star Wars: TIE Fighter reimplementation, will run on your machine, which v0.0.6 release file to download or whether you must build from source, which original edition you have to supply, and which graphics and audio backends you actually get. Rules read straight from the upstream README and release assets.
- [Port Number Lookup & Range Classifier — TCP/UDP ports](https://induwara.lk/tools/port-number-lookup) — Search any TCP/UDP port number or service name and get the assigned service, transport protocol, IANA range (well-known / registered / dynamic), the governing RFC, and a security note where the classic protocol is insecure. Classifies any number 0–65535 against RFC 6335. Runs in your browser.
- [PSNR Calculator (Peak Signal-to-Noise Ratio)](https://induwara.lk/tools/psnr-calculator) — Calculate Peak Signal-to-Noise Ratio (PSNR) in decibels for image and video quality, from a known MSE and bit depth, or from two pixel-value lists. Shows MAX, the MSE used, a quality band, and the full derivation. Free, no signup.
- [px to rem Converter (CSS px, rem, em, pt)](https://induwara.lk/tools/px-to-rem-converter) — Convert CSS lengths between px, rem, em, and pt instantly, with a configurable root font-size and a live px→rem reference table. One-click copy of the ready-to-paste value. Runs entirely in your browser.
- [Schema Markup Generator (JSON-LD Structured Data)](https://induwara.lk/tools/schema-markup-generator) — Turn a simple form into Google-valid JSON-LD structured data for the rich-result types people actually use, LocalBusiness, Organization, Article, Product, FAQPage, BreadcrumbList, Event and Person. Live property checklist, copy-paste script block, runs entirely in your browser.
- [SMAPE Calculator (Symmetric Mean Absolute Percentage Error)](https://induwara.lk/tools/smape-calculator) — Compute the Symmetric Mean Absolute Percentage Error between actual and forecast values, with a per-point breakdown and a toggle between the 0–200% (Makridakis) and 0–100% (Armstrong) definitions. Runs entirely in your browser, no upload.
- [SSIM Calculator (Structural Similarity Index)](https://induwara.lk/tools/ai-ssim-calculator) — Calculate the Structural Similarity Index (SSIM) between two images, or from two pixel-value lists, with the luminance, contrast and structure breakdown, the C1/C2 constants used, and a quality band. Runs entirely in your browser, verified against scikit-image.
- [TOML to JSON Converter (bidirectional)](https://induwara.lk/tools/toml-to-json-converter) — Convert TOML to JSON and JSON to TOML in your browser with validation, type-mapping notes, and a round-trip integrity check, per the TOML v1.0.0 spec.
- [Unix Timestamp (Epoch) Converter](https://induwara.lk/tools/unix-timestamp-converter) — Convert Unix epoch time (seconds, ms, µs, ns) to a human-readable date in UTC, Sri Lanka, and local time, and back, with relative time, ISO-week facts, and the Year-2038 boundary, all in the browser.
- [XML to JSON Converter](https://induwara.lk/tools/xml-to-json-converter) — Convert XML to clean, well-formed JSON instantly and entirely in your browser. Handles attributes (configurable prefix), nested elements, repeated elements collapsed to arrays, CDATA, and a configurable text-node key. Locates well-formedness errors by line and column, and verifies every conversion with a JSON round-trip. No upload, no signup.
- [YAML to JSON Converter (bidirectional)](https://induwara.lk/tools/yaml-to-json-converter) — Convert YAML to JSON and JSON to YAML entirely in your browser. Auto-detects direction, expands anchors/aliases and merge keys, handles multi-document streams, locates parse errors by line, and verifies each conversion with a round-trip check. No upload, no signup.

### Image (2)

- [EXIF & Metadata Viewer for Images and Videos](https://induwara.lk/tools/exif-metadata-viewer) — View all EXIF and metadata of any photo or video, camera, exposure, capture date, and GPS location, entirely in your browser. Nothing is uploaded. Free, no signup.
- [EXIF Metadata Editor & Viewer for Images and Videos](https://induwara.lk/tools/exif-metadata-editor) — Edit the EXIF metadata of a photo, title, author, copyright, date taken, camera, and GPS location, then download an edited copy. Or strip every tag in one click. Runs fully in your browser, nothing uploaded. Free, no signup.

### Time (1)

- [Time Card & Work Hours Calculator](https://induwara.lk/tools/time-card-calculator) — Enter clock-in, clock-out and break times to get hours worked per day, the weekly total, and an automatic regular-vs-overtime split. Optional hourly pay turns hours into regular, overtime, and gross pay. Runs entirely in your browser.

### Freelance (12)

- [AI Cover Letter Generator — Free, Sri Lanka](https://induwara.lk/tools/ai-cover-letter-generator) — Generate a tailored, one-page professional cover letter for Sri Lankan job seekers from a job title, pasted job ad or skills, and experience level, with editable paragraphs and a copy-ready letter.
- [Amazon KDP Royalty Calculator (eBook & Paperback)](https://induwara.lk/tools/amazon-kdp-royalty-calculator) — Work out your exact per-sale Amazon KDP royalty. Compare the 35% and 70% Kindle eBook plans and the 60% paperback royalty, with delivery and printing costs, across Amazon.com, .co.uk, .de and .in. Free, no signup, formulas and sources cited.
- [App Store & Google Play Commission Calculator](https://induwara.lk/tools/app-store-commission-calculator) — See exactly how much you keep after Apple's App Store or Google Play takes its cut. Applies the 15% vs 30% tiers correctly, Apple Small Business Program, Google Play's first-$1M rate and reduced subscription rates, and shows both stores side by side with an annual net-revenue projection.
- [Fiverr Fee & Earnings Calculator (Sri Lanka)](https://induwara.lk/tools/sri-lanka-fiverr-fee-calculator) — See what a Fiverr order really leaves in your Sri Lankan bank after the 20% seller service fee, the withdrawal fee, and the USD→LKR conversion margin, with net rupees, net USD, and effective take-home percentage.
- [Free Quotation Generator (Quote / Estimate Maker)](https://induwara.lk/tools/quotation-generator) — Create a professional price quotation or estimate, then download a clean A4 PDF. Line items, discount, Sri Lanka VAT and SSCL, deposit, validity date, and an acceptance block, six currencies, all in your browser.
- [Freelance Platform Fee Calculator (Fiverr, Upwork, Freelancer.com, Guru)](https://induwara.lk/tools/freelance-platform-fee-calculator) — See exactly what you keep after platform fees on Fiverr, Upwork, Freelancer.com and Guru. Enter an order amount and compare net take-home side by side, with an optional LKR figure for Sri Lankan freelancers.
- [Sri Lanka Freelancer Tax Calculator (Foreign Service Income 2025/26)](https://induwara.lk/tools/sri-lanka-freelancer-tax-calculator) — Calculate the income tax a Sri Lankan freelancer or remote worker owes on foreign-currency earnings under the concessionary 15%-capped 2025/26 structure, with bracket breakdown, take-home, and bank-vs-offshore comparison.
- [Sri Lanka Payoneer Fee Calculator](https://induwara.lk/tools/sri-lanka-payoneer-fee-calculator) — See exactly what reaches your Sri Lankan bank after Payoneer's receiving fee, currency-conversion margin and withdrawal fee. Itemises every deduction and ranks the cheapest way to get paid in USD. Free, sources cited.
- [Sri Lanka Skrill Fee Calculator](https://induwara.lk/tools/sri-lanka-skrill-fee-calculator) — See exactly what reaches your Sri Lankan bank after Skrill's currency-conversion markup and withdrawal fee. Itemises every deduction, handles the EUR minimum floor, and ranks the cheapest way to cash out USD, EUR or GBP. Free, sources cited.
- [Sri Lanka Upwork Fee Calculator](https://induwara.lk/tools/sri-lanka-upwork-fee-calculator) — See exactly what you keep from an Upwork contract after the 10% freelancer service fee and your withdrawal fee (Direct to Local Bank, Wire, PayPal, Payoneer), converted to Sri Lankan rupees at your own rate. Free, no signup, Upwork fees cited.
- [Sri Lanka Wise Transfer Fee Calculator](https://induwara.lk/tools/sri-lanka-wise-transfer-fee-calculator) — Calculate the exact Wise fee to send money to a Sri Lankan bank account and the rupees the recipient receives at the mid-market rate. Covers USD, GBP, EUR, AUD and CAD, with card surcharges and a cheapest-route comparison. Free, sources cited.
- [YouTube Monetization Eligibility Checker — YPP Requirements](https://induwara.lk/tools/youtube-monetization-eligibility-checker) — Check whether your channel qualifies for the YouTube Partner Program against the exact official thresholds, the 500-subscriber earlier-access tier and the 1,000-subscriber full ad-revenue tier, with a per-criterion checklist and the precise gap for anything you're short. Deterministic, no signup, sources cited.

## Current figures

Verified reference data, each line self-contained and dated. Quote the date
alongside the number: these change when the issuing authority changes them, and
the page always carries the newer value than any cached copy of this file.

- **Sri Lanka University Cut-Off Marks Finder (UGC Z-Score)** — https://induwara.lk/tools/sri-lanka-university-cutoff-finder (last verified 2026-08-03; source: University Grants Commission of Sri Lanka, published cut-off release)
  - For the 2025/2026 admission cycle, a candidate applying from the Colombo district needed a Z-score of 2.2721 to be selected for the MBBS degree at the University of Colombo, per the University Grants Commission's published cut-off release.
  - BSc Engineering at the University of Moratuwa closed at Z 2.0363 for Colombo-district candidates in the same release, and at Z 2.0291 in Hambantota and Badulla, the lowest districts recorded for that course.
  - The UGC publishes one Z-score per district per course, the minimum a candidate from that district needed, whichever quota selected them, so there is no separate all-island merit figure for most courses.
  - University seats are divided 40% on All-Island Merit, 55% by District Quota and 5% for Educationally Disadvantaged Districts, under the UGC admission circular.
  - 16 of Sri Lanka's 25 districts are listed as Educationally Disadvantaged for this cycle: Ampara, Anuradhapura, Badulla, Batticaloa, Hambantota, Jaffna, Kilinochchi, Mannar, Monaragala, Mullaitivu, Nuwara Eliya, Polonnaruwa, Puttalam, Ratnapura, Trincomalee, Vavuniya.
  - This page carries the per-district cut-offs for 29 of the highest-demand state-university programmes in that release; the full handbook lists more.
- **Sri Lanka Grade 5 Scholarship Cut-Off Marks Checker** — https://induwara.lk/tools/sri-lanka-grade-5-scholarship-cutoff-marks (last verified 2026-09-03; source: Ministry of Education school cut-off release; district cut-offs from the Department of Examinations release, cross-checked against press copies where no official PDF was published)
  - In the 2026 Grade 5 Scholarship examination (sat 9 August 2026), the Sinhala-medium district cut-off mark for Colombo was 139 out of 200.
  - Across the 23 districts with a published Sinhala-medium cut-off that year, the highest was 139 (Colombo, Gampaha, Kalutara, Kandy, Matale, Galle, Matara, Kurunegala, Kegalle) and the lowest 125 (Mannar, Vavuniya, Mullaitivu, Batticaloa), the pass mark is district-relative, not national.
  - 289,867 children sat the 2026 Grade 5 Scholarship examination.
  - For Grade 6 admission in 2026, Royal College, Colombo 07 admitted at 175 marks on the Ministry of Education's school cut-off release for the 2025 examination.
  - That Ministry release lists 302 schools across 24 districts, in Sinhala and Tamil medium; this page carries all of them.
  - A district cut-off and a school cut-off are different bars: clearing your district's mark makes a child eligible, but a national school sets its own, usually much higher, admission mark.
- **Sri Lanka Driving Licence Fee Calculator (DMT 2026)** — https://induwara.lk/tools/sri-lanka-driving-license-fee-calculator (last verified 2026-09-23; source: Department of Motor Traffic, Charges For Services, the consolidated Motor Traffic (Driving Licence Levy) Regulations No. 03 of 2022 incorporating amendments up to November 17, 2025)
  - Applying for a learner's permit and a first Sri Lankan driving licence costs Rs 2,500 for one vehicle class, Rs 3,000 for two classes applied for at the same time and Rs 3,500 for three or more, on normal service. The same-day prices are Rs 3,500, Rs 4,000 and Rs 4,500.
  - The levy is charged per application and banded by the number of classes on it, not per class, an application naming five classes costs the same as one naming three.
  - Adding new classes to a licence you already hold is priced on the same three bands, starting at Rs 2,500 for normal service and Rs 3,500 for same-day service for one class added.
  - Renewing or extending the validity of a licence for one period is Rs 2,800 for normal service and Rs 4,000 for same-day service, plus an additional Rs 500 where the validity has lapsed by a year or less.
  - A duplicate licence for the existing validity period is Rs 2,800 for normal service and Rs 4,000 for same-day service, rising to Rs 7,800 for normal service and Rs 9,000 for same-day service where the licence was lost.
  - Changing the particulars of a licence on its own is Rs 3,300 for normal service and Rs 4,500 for same-day service; done in the same visit as adding classes, renewing or taking a duplicate it is an add-on of Rs 500 instead.
  - Converting an existing Sri Lankan licence into the new licence is Rs 2,800 for normal service and Rs 4,000 for same-day service.
  - Issuing a Sri Lankan licence to a citizen who holds a licence issued abroad is Rs 30,000, and Rs 60,000 for a person who is not a citizen; both are the same for normal and same-day service.
  - An international driving permit issued by the Department is Rs 3,000 for normal service and Rs 3,500 for same-day service, and postal charges covering packaging, delivery and courier are Rs 225.
  - Schedule I prices no practical-trial fee at all: re-applying for the written test is Rs 500 and re-applying for the practical test Rs 1,000, with the first attempt at each covered by the application levy.
  - The medical fitness certificate is a National Transport Medical Institute charge, not a Department of Motor Traffic levy, so it is not on this schedule and none of the figures above include it.
  - Schedule II prices one online service, in dollars rather than rupees: US$ 25 to verify a licence's details for a Sri Lankan citizen overseas, applied for through the relevant embassy or high commission.
- **Sri Lanka Government Salary Increase Calculator (2025–2027)** — https://induwara.lk/tools/sri-lanka-government-salary-increase-calculator (last verified 2026-09-23; source: Ministry of Public Administration, Provincial Councils and Local Government, Public Administration Circular 10/2025, 25.03.2025 (Schedule III))
  - Public Administration Circular 10/2025 raises the lowest step in the Sri Lankan public service, salary code PL 1-2025 Grade III, step 1, from a monthly basic salary of Rs 24,250 as at 31 December 2024 to Rs 40,000.
  - An officer on that step is paid a basic salary of Rs 37,725 a month from 1 January 2025, Rs 38,863 from 1 January 2026, and the full Rs 40,000 from 1 January 2027, as Schedule III of the circular sets out.
  - The increase paid is not the whole gap between the old and new scales. Paragraph 3.8.2 first deducts Rs 7,500, the Rs 2,500 monthly interim allowance of Circular 09/2019 and the Rs 5,000 monthly allowance of Circular 03/2022, because the new scales absorb both. On the lowest step that turns a gap of Rs 15,750 into a net increase of Rs 8,250.
  - That net increase is released in three phases under paragraph 3.8.3: Rs 5,000 plus 30% of the remainder from 1 January 2025, Rs 5,000 plus 65% of the remainder from 1 January 2026, all of it from 1 January 2027.
  - The first phase is due from 1 January 2025 but was first paid on 1 April 2025, with no arrears for the months in between (paragraph 3.7).
  - The highest monthly basic salary anywhere in the circular is Rs 310,000, on salary code AGS 9-2025 in the Attorney General's Department.

## Recent news

Short, sourced writeups on trending Sri Lanka topics — every post lists the
independent sources used to verify it and is reviewed by a human before
publishing. Structured JSON (including full body + sources) is at
https://induwara.lk/api/v1/news?slug=<slug>; a plain list is at https://induwara.lk/api/v1/news.

- [Sri Lanka Targets Q4 for First Digital ID Cards](https://induwara.lk/news/sri-lanka-targets-q4-for-first-digital-id-cards) — Sri Lanka says it will issue its first production digital identity credentials under the SL-UDI program by Q4 2026, starting with a minimum viable product before wider rollout — part of a broader digital-government push that also moves vehicle fine payments online this month.
- [Sri Lanka Tourist Arrivals Dip 3.3% in August, Still Pass 1.5 Million for the Year](https://induwara.lk/news/sri-lanka-tourist-arrivals-dip-3-3-in-august-still-pass-1-5-million-fo) — Sri Lanka logged 191,704 tourist arrivals in August 2026, down 3.3% year-on-year, with India, the UK, and China again the top three source markets.
- [Rumesh Pathirage wins the Diamond League Final — a first for Sri Lanka](https://induwara.lk/news/rumesh-pathirage-wins-the-diamond-league-final-a-first-for-sri-lanka) — Rumesh Tharanga Pathirage became the first Sri Lankan to win a Diamond League Final, taking the men's javelin title in Brussels with an 89.04m throw.

## Recent blog posts

- [Morphotonics raised €40M because AI's bottleneck is the wire](https://induwara.lk/blog/2026-09-22-morphotonics-raises-40m-to-expand-its-display-tech) — Morphotonics raised €40M to take its nanoimprint stamping machines from AR glasses into data centre optics. Here is what that says about where AI hardware actually hurts.
- [The Robin Williams AI video proves detection already lost](https://induwara.lk/blog/2026-09-22-robin-williams-daughter-to-fans-creating-ai-videos) — Zelda Williams called the fake video of her father 'not even particularly convincing AI'. It spread anyway. Why provenance, not detection, is the defence small teams can actually build.
- [Meta Muse 0-day: a config bug with agent-sized blast radius](https://induwara.lk/blog/2026-09-22-muse-meta-s-extraordinarily-privileged-ai-assistan) — The Meta Muse 0-day is not an AI vulnerability. It is an unauthenticated local config channel attached to an assistant holding every permission you gave it.
- [Hosted AI video workflows: what Mux Robots is really selling](https://induwara.lk/blog/2026-09-22-sponsor-mux-turn-your-video-into-context) — Mux wants you to treat video as structured data, not a file you stream. The idea is right. Whether you should buy it, or build the cheap version yourself, depends on your upstream bandwidth.
- [AI won't buy your laptop, but it will pick which one you buy](https://induwara.lk/blog/2026-09-22-the-man-who-built-apple-s-stores-doesn-t-buy-silic) — Apple's store architect says nobody will let an AI agent buy their laptop. He's probably right. But the research step is already gone, and that's the part Sri Lankan sellers are losing today.
- [Waymo chose Singapore because Singapore wrote the test](https://induwara.lk/blog/2026-09-18-waymo-says-singapore-will-be-its-next-internationa) — Waymo is skipping New York and Chicago for Singapore in 2028. The reason isn't market size. It's that Singapore published the test you have to pass, and that's a lesson you can copy.
- [Waymo's flood fix: shrink the map, not just the model](https://induwara.lk/blog/2026-09-17-waymo-restarts-san-antonio-service-5-months-after-) — Waymo lost a robotaxi to a flash flood and an entire city for five months. The fix wasn't a smarter model. It was a smaller operating area. That lesson is cheap to copy.
- [Harbor evals on Vercel Sandbox: benchmarking without a big machine](https://induwara.lk/blog/2026-09-17-run-terminal-bench-and-other-harbor-evals-on-verce) — You can now run Harbor evals on Vercel Sandbox, one microVM per trial. Here is what that actually changes for small teams, students and anyone without a workstation.
- [Rogue AI agents are a supply-chain problem, not sci-fi](https://induwara.lk/blog/2026-09-17-the-ai-slowdown-debate-crashed-salesforce-s-party) — OpenAI, Anthropic and Nvidia argued about slowing AI down at Dreamforce. The incidents behind that argument were plain security failures, and they land on your machine too.
- [Cognition's $48B valuation: what it means for devs in Sri Lanka](https://induwara.lk/blog/2026-09-09-cognition-hits-48b-valuation-signaling-investors-b) — Cognition raised at a $48B valuation on $900M ARR, a 53x multiple. Here's what the AI coding funding war actually costs a developer billing in rupees.
- [Claude token theft: your AI subscription is now worth stealing](https://induwara.lk/blog/2026-09-09-hackers-are-stealing-claude-tokens-from-subscriber) — Hackers are draining Claude subscribers' token quotas using infostealer malware. It isn't a platform breach, it's your laptop, and the billing model makes it hard to notice.
- [White House 'Build the Wall' Game Pulled: A Clone-Risk Lesson](https://induwara.lk/blog/2026-09-09-white-house-takes-down-build-the-wall-game-after-t) — The White House pulled its Tetris-style 'Build the Wall' game after the Tetris Company said it takes copyright seriously. What solo builders should copy from that, and what they shouldn't.
- [Microsoft Repos Got Hacked. Your Dependencies Aren't Safe.](https://induwara.lk/blog/2026-06-09-microsoft-s-open-source-tools-were-hacked-to-steal) — Hackers slipped password-stealing malware into dozens of Microsoft's own GitHub projects. Here's what a Sri Lankan dev on a free tier should actually do about it.
- [The Meta AI Hack Is a Warning About Agent Security](https://induwara.lk/blog/2026-06-07-the-meta-hack-shows-there-s-more-to-ai-security-th) — Attackers stole Instagram accounts by politely asking Meta's AI support agent. The lesson for anyone wiring AI agents into real systems is uncomfortably simple.
- [Anthropic's IPO: What It Means If You Build on AI](https://induwara.lk/blog/2026-06-02-anthropic-files-to-go-public) — Anthropic filed confidentially to go public. Here's what an IPO changes for Sri Lankan devs, students, and small teams who build on its AI, and how to stay portable.
- [Opus 4.8 Dynamic Workflows: Do You Need a Subagent Swarm?](https://induwara.lk/blog/2026-05-28-anthropic-releases-opus-4-8-with-new-dynamic-workf) — Anthropic's Opus 4.8 ships a Dynamic Workflows tool for coordinating swarms of subagents. Here's what that actually means for a solo builder in Sri Lanka.
- [Is Surfshark's 87% off VPN deal worth it from Sri Lanka?](https://induwara.lk/blog/2026-05-16-surfshark-promo-codes-87-off-may-2026) — WIRED is running another Surfshark 87% off promo. I break down what the discount actually costs in rupees, when a free tier beats it, and when the prepay deal pays off.
- [Reversible computing: the chip that recycles its own heat](https://induwara.lk/blog/2026-09-08-this-founder-is-teaching-chips-how-to-recycle-thei) — Vaire Computing says its chip recovered more energy than it lost. What reversible computing actually is, why it is decades old, and what it means for anyone in Sri Lanka paying for compute.
- [Xiaomi 18 Fold: the foldable spec war just moved to silicon](https://induwara.lk/blog/2026-09-08-xiaomi-s-wide-foldable-promises-more-power-than-sa) — Xiaomi's 18 Fold out-specs the Galaxy Z Fold 8 on chip, battery and camera for less money. What its in-house Xring O3 chip and 1.4:1 screens mean for Sri Lankan buyers and Android developers.
- [Arm Mali G2-Ultra NX: What AI-Native Mobile Graphics Means for Us](https://induwara.lk/blog/2026-09-08-arm-mali-g2-ultra-nx-gpu-desktop-class-mobile-game) — Arm's Mali G2-Ultra NX puts neural accelerators inside the shader cores. I read the announcement and worked out what it means for a Sri Lankan gamer, student, or indie game dev.
- [Jellyfin 12.0: Upgrade Checklist for Home Media Servers](https://induwara.lk/blog/2026-09-08-jellyfin-12-0) — Jellyfin 12.0 rewrites its database, drops the old Emby API paths and breaks every plugin. Here is what a Sri Lankan self-hoster should check before pressing upgrade.
- [McKinley 1.0: A $60 SF Symbols Editor Worth Studying](https://induwara.lk/blog/2026-09-08-mckinley-1-0) — McKinley 1.0 is a native Mac app for drawing custom SF Symbols across weights, with live Apple rendering and Xcode sync. Who needs it, what the 14-day trial covers, and when the free route is enough.
- [Tiiny AI Pocket: 120B LLMs in 300g, and What It Means in Sri Lanka](https://induwara.lk/blog/2026-09-08-the-smallest-edge-ai-device-for-local-llms) — Tiiny AI's pocket box claims 120B-parameter local LLMs from 80GB of memory at 30W. I read the spec sheet so you don't have to, and work out what it means for a Sri Lankan builder.
- [Le Creuset x Star Trek: Prices and What the Space Stunt Teaches](https://induwara.lk/blog/2026-09-08-le-creuset-x-star-trek-collection-prices-availabil) — Full price list for the Le Creuset x Star Trek collection, the engineering behind flying a cast-iron pot to 111,000 feet, and the launch playbook a small Sri Lankan team can copy.
- [Jensen Huang says AGI has arrived. Watch the GPU count](https://induwara.lk/blog/2026-09-07-nvidia-s-jensen-huang-says-agi-has-arrived-and-con) — Nvidia's CEO declared AGI on X and congratulated OpenAI. Four people at the centre of the story define AGI four different ways. Here's what actually changes for a small team.

## About the author

Induwara Ashinsana is a Sri Lankan student and software engineer, studying
Information Systems at the University of Colombo School of Computing (UCSC)
and building Ryzera Technologies as a Co-Founder. He builds and
maintains induwara.lk.

- Profile: https://induwara.lk/about
- GitHub: https://github.com/iashinsana
- LinkedIn: https://www.linkedin.com/in/induwara-ashinsana-138a94209/
- Contact: hello@induwara.lk

## Editorial principles

- Every calculator cites its statutory or official source in the page
  methodology section, with the date that source was last checked printed on
  the page.
- Every tool page includes worked examples computed from the same module the
  calculator runs on.
- Brackets, rates and formulas are reviewed every April (the start of a new Sri
  Lankan year of assessment) and after any Inland Revenue Amendment Act.

## How content here is produced, by type

- **Tool pages and their data** are researched and verified against the named
  official source, and carry a "last verified" date. The author checks these.
- **Blog posts** (https://induwara.lk/blog) are AI-drafted from a news item and gated by
  an automated reviewer. The author does NOT read every post before it
  publishes. Treat them as machine-written, and prefer the tool pages and
  https://induwara.lk/news for anything you intend to state as fact.
- **News posts** (https://induwara.lk/news) are drafted with their sources listed and
  are approved by the author by hand before publishing.
- **Published errors** are logged at https://induwara.lk/corrections, with what the page
  said before, what it says now, and the source that settled it.

## Authoritative sources used

- Inland Revenue Department of Sri Lanka — https://www.ird.gov.lk
- Central Bank of Sri Lanka — https://www.cbsl.gov.lk
- University Grants Commission of Sri Lanka — https://www.ugc.ac.lk
- Department of Examinations Sri Lanka — https://www.doenets.lk
- Ceylon Electricity Board / LECO published tariff schedules
- Sri Lanka Railways published timetables