Standardized Test Score Percentile Calculator
Enter your test score along with the mean and standard deviation of the score distribution to estimate what percentile of test-takers scored at or below your result.
About this calculator
Estimate what percentile a test score falls into based on the mean and standard deviation of the score distribution, using the normal distribution.
Frequently Asked Questions
How is percentile calculated from a score?
The score is converted into a z-score (how many standard deviations it is from the mean), then the normal distribution's cumulative function estimates what fraction of test-takers scored at or below that value.
Does this work for any standardized test?
Yes, as long as you know or can estimate the mean and standard deviation for that test's score distribution, such as the SAT, ACT, or GRE.
Why might my actual percentile differ slightly?
Real score distributions aren't perfectly normal, so official percentile tables from test administrators may differ slightly from this normal-distribution estimate.