Colleges accept both the SAT and the ACT, but the two tests use completely different scales — the SAT ranges from 400 to 1600, while the ACT ranges from 1 to 36. When students take one test, retake the other, or want to know how their score compares to a school's admitted-student profile listed in the opposite scale, they need a reliable way to translate between the two. That's the purpose of an SAT/ACT concordance calculator.
The College Board and ACT jointly released official concordance tables that map score ranges on one test to equivalent score ranges on the other, based on large-scale data from students who took both exams. Our calculator uses these published concordance relationships so you can enter a score on either test and see the corresponding equivalent score on the other — useful for deciding which test to focus retaking, for comparing your score to a target school's middle 50% range, or simply for understanding how your performance stacks up across both scales.
Keep in mind that concordance is a statistical mapping, not a perfect one-to-one formula — two students with the "equivalent" score didn't necessarily miss the exact same number of questions, since the tests measure overlapping but not identical skills. Still, for the practical purposes of comparing scores or checking an admissions range, the official concordance tables remain the most reliable translation available between the two exams.