A plain-English guide to what the SAT and ACT measure, why concordance tables exist, and how the official 2018 table was built.
The SAT and ACT are the two national college-admissions tests used across the United States. Nearly every four-year college accepts either one, and neither is "harder to get into college with" — but because the two tests use completely different scales, students, parents, and counselors often want a quick way to compare a score on one test to a score on the other. That comparison is called concordance, and it's built from a joint statistical study by the two testing organizations rather than a simple formula.
What is the SAT?
Quick answerThe SAT reports a total score from 400 to 1600, in multiples of 10, made up of two section scores: Evidence-Based Reading and Writing (EBRW) and Math, each scored 200-800. Since 2024 the SAT is administered digitally, but it still uses the same 1600-point scale introduced in the 2016 redesign.
- Total score: 400-1600 (sum of the two section scores)
- Section scores: EBRW 200-800, Math 200-800
- Format: multiple-choice and student-produced-response questions; the separate SAT Essay was discontinued in 2021
What is the ACT?
Quick answerThe ACT reports a composite score from 1 to 36, which is the average of four section scores — English, Math, Reading, and Science — each also scored 1-36, rounded to the nearest whole number. An optional Writing test is scored separately (2-12) and is not part of the composite.
- Composite score: 1-36 (rounded average of four sections)
- Section scores: English, Math, Reading, Science — each 1-36
- Optional Writing: scored 2-12, reported separately, not folded into the composite
Why do SAT-ACT concordance tables exist?
Quick answerConcordance tables let students, counselors, colleges, and scholarship programs compare scores from applicants who took different tests, without requiring anyone to retake either exam. Some scholarship criteria and internal benchmarking tools reference concordant score ranges, and students use them to gauge how a score on one test "would have looked" on the other.
Because a growing share of students take only one of the two tests, admissions offices, honor societies, and NCAA eligibility centers occasionally need a shared reference point. Concordance tables provide that reference without pretending the two tests are interchangeable question-for-question.
How was the 2018 concordance table built?
Quick answerAfter the SAT's 2016 redesign, the College Board and ACT, Inc. jointly ran a concordance study, matching the scores of students who had taken both the redesigned SAT and the ACT. The result, published in 2018, lines up scores that correspond to similar percentile ranks rather than using a fixed arithmetic formula, and it replaced an earlier interim 2016 table.
How do you convert an SAT score to an ACT score, and back?
Quick answerUse the calculator above: pick a direction, enter your score, and the tool looks it up directly in the official 2018 table. Because the SAT has many more possible totals than the ACT has possible composites, several SAT scores can share one ACT composite — so the ACT-to-SAT direction returns a small concordant range plus a representative value, while SAT-to-ACT returns a single ACT number.
What this tool does not do
This calculator is a lookup against the official concordance table — nothing more. It does not compute an official score, does not know your superscore or writing/essay score, does not predict admissions outcomes, and does not replace guidance from your school counselor or the testing organizations. Colleges evaluate the actual test you took; concordance is only for your own comparison.