Percentile Calculator

A percentile indicates the value below which a given percentage of data points fall. For example, if a score is at the 75th percentile, it means 75% of the data values are equal to or less than that score. Percentiles are widely used in statistics, education, health assessments, and standardized testing.

This calculator uses the same interpolation method as Excel's PERCENTILE() function and Google Sheets. The data is first sorted in ascending order. Then the rank r is calculated as r = (k/100) × (n − 1) + 1, where k is the desired percentile and n is the count. If r is a whole number, the value at that position is the answer; otherwise, linear interpolation is applied between the surrounding values.

A percentage represents a proportion out of 100 (e.g., you scored 80% on a test). A percentile is a relative ranking that shows where a value stands within a distribution (e.g., your score is in the 80th percentile, meaning you scored higher than 80% of test-takers). They are related concepts but measure different things.

Quartiles divide a dataset into four equal parts. Q1 (the first quartile) is the 25th percentile, Q2 (the median) is the 50th percentile, and Q3 (the third quartile) is the 75th percentile. So quartiles are simply specific, commonly-used percentile values.

You can enter numbers separated by commas, spaces, or new lines. For example: '5, 12, 17, 23, 35' or pasting a column of numbers copied from a spreadsheet. The calculator automatically cleans and sorts the data before computing.

When you enable the percentile table, the calculator displays the computed value for every 5th percentile (5th, 10th, 15th, … 95th, 100th), along with the quartiles. This gives you a complete overview of how your data is distributed across the full range.

Yes. This calculator works for any numeric dataset — test scores, heights, weights, salaries, response times, or any other measured values. Simply enter your numbers and the percentile rank you want to find, and the calculator handles the rest.

There are several different methods for computing percentiles (e.g., nearest rank, linear interpolation, exclusive vs. inclusive). This calculator uses the linear interpolation method (Excel-compatible), which is one of the most common standards. Results may differ slightly from calculators that use other methods.