Illinois IAR Mathematics Percentile Calculator

Use this Illinois IAR Mathematics percentile calculator to estimate a percentile from a scale score, see which performance band a student falls into, and get a clear action plan to move toward the next band.

These percentile estimates are based on the officially reported IAR Math Cut Scores and Score Ranges. For a deeper dive, explore our IAR guides by grade to see real question examples for each performance band and learn how the test works.