Percentile Calculator
Find any percentile and the quartiles of a list of numbers.
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Step by step
The formula
linear interpolation at rank p·(n−1)/100 of the sorted list
A percentile marks the value below which a given share of the data falls. Quartiles split the data into four, and the gap between the first and third — the interquartile range — measures spread while ignoring outliers entirely, unlike standard deviation.
All calculations run locally in your browser and update instantly as you type.
Example calculations
Common questions this calculator answers — select one to load its values.
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Frequently asked questions
What does a percentile mean?+
The pth percentile is the value below which roughly p% of the data falls. This tool uses linear interpolation between sorted values, the same method as most spreadsheets.
All calculations run locally in your browser. Nothing you type is sent to a server.