Test Percentile Calculator
A percentile rank turns a raw test result into a measure of standing: it tells you what percentage of test takers you matched or beat. The standard definition counts the scores below yours, adds half of the scores tied with yours, divides by the total number of test takers, and multiplies by 100. This calculator lets you enter either the number of scores below and equal to yours, or simply your class rank out of the group size, and returns your percentile rank along with the percentage scoring above you. It uses the textbook formula exactly, so the result is deterministic and reproducible.
Percentile formula
percentile rank = (below + 0.5 * equal) / total * 100
percent below = below / total * 100
percent above = (total - below - equal) / total * 100
equivalent rank = total - below - equal + 1
The equal count includes your own score. The half-weighting of ties is the standard mid-rank convention used in most statistics textbooks.
Reading the result
- Percentile rank is a position relative to the group, not a percentage of questions correct.
- A percentile near 99 is near the top; near 1 is near the bottom.
- Ties are split evenly between the percent-below and percent-above figures.
- Equivalent class rank counts 1 as the highest scorer in the group.
- For an official standardized-test percentile, rely on the testing organization's score report.
Test percentile: frequently asked questions
What is a percentile rank?
A percentile rank tells you the percentage of test takers who scored at or below your score. A percentile of 85 means you did as well as or better than 85 percent of the group. It describes your relative standing, not the percentage of questions you answered correctly.
How is percentile rank calculated?
A common definition is the percentage of scores below yours plus half the scores equal to yours, divided by the total, times 100. With only counts of scores below and equal, percentile = (below + 0.5 * equal) / total * 100. This calculator uses that standard definition.
How do I get percentile from a class rank?
If you rank Nth out of T students (1 is the top), the percentage of students at or below you is (T - N + 1) / T. Multiply by 100 for a percentile. The calculator accepts either a rank-based input or a counts-based input.
Why is the result not the same as my test score?
Percentile measures how you compare to others, while your test score measures how many points you earned. A high raw score can be a modest percentile in a strong group, and a modest raw score can be a high percentile in a weaker group. They answer different questions.
Does this match how standardized tests report percentiles?
Standardized tests publish percentile tables from large reference samples, and exact conventions vary slightly between programs. This calculator uses the standard textbook definition for your own group. For an official test percentile, use the score report from the testing organization.
Official sources
- National Center for Education Statistics: NCES (assessment and percentile reporting).
- U.S. Department of Education: official site.
Reviewed by the CalculatorHub team, edited by James Graham, 17 June 2026. The percentile-rank formula is a standard statistical definition. See our methodology.