Percentile Calculator
Finds the value below which a given share of the data falls.
Share sends a link that reopens these numbers. Copy details pastes the full breakdown as a list.
The formula
inclusive position = (n − 1) × p + 1 exclusive position = (n + 1) × p nearest rank = ⌈n × p⌉
Positions count from 1 in the sorted list, and a fractional position is interpolated between its neighbours. Nearest rank always returns a value from the data.
What to watch out for
“Percentile” has several accepted definitions. The inclusive method treats the smallest value as the 0th percentile and the largest as the 100th.
Frequently Asked Questions
What is the 40th percentile of 15, 20, 35, 40, 50?
29 by the inclusive method, 26 by the exclusive method and 20 by nearest rank.
Is a percentile the same as a percentage?
No. A percentage is a share of a total. A percentile is a position in an ordered list. Scoring 70% can be the 90th percentile if most people scored less.