SAT to ACT Score Converter (Official Concordance)

The SAT and ACT are scored on completely different scales, so you cannot compare them by arithmetic. To let admissions offices treat the two exams as interchangeable, College Board and ACT jointly published a concordance — a table built by matching the scores of students who took both tests. This converter is a direct lookup into that official 2018 single-score concordance; it invents no formula, because the test makers explicitly warn against rule-of-thumb conversions.

The concordance maps each ACT composite (1–36) to a single concorded SAT total plus a contiguous SAT band. For example, ACT 30 concords to SAT 1370 with the band 1360–1380. Because SAT totals are reported in steps of 10, these bands tile the 590–1600 range with no gaps or overlaps, so every valid SAT total lands in exactly one band.

1. SAT → ACT. Your SAT total is clamped to the 400–1600 scale and snapped to the nearest multiple of 10. The tool then finds the concordance band that contains it and reads across to the ACT composite.
2. ACT → SAT. Your ACT composite is looked up directly; the table returns its concorded SAT total as the point estimate, along with the SAT band that maps back to that composite.
3. Percentiles.Each score is matched to an approximate national percentile — SAT from College Board's nationally representative sample, ACT from ACT's national norms. They use different norm years, so they are shown as approximate.
4. Out of range. The published concordance stops at SAT 590 / ACT 9. Below that, the tool shows a clear out-of-range message instead of extrapolating, exactly as the official guide instructs.

Every row in the table is self-checked at load: the bands are confirmed to be contiguous, and each ACT's concorded SAT total is converted back to confirm it round-trips to the same composite. That is the "round-trip verified" badge on the tool.

• College Board & ACT — Guide to the 2018 ACT/SAT Concordance (official concordance tables)
• ACT, Inc. — ACT/SAT Concordance overview and usage guidance
• College Board — Understanding SAT Scores (percentile ranks)
• ACT, Inc. — National Norms (composite percentile ranks)

The concordance table on this page was last cross-checked against the official 2018 College Board & ACT concordance on 2026-07-09. Percentiles are approximate because the SAT and ACT norm samples use different reference years.