Percentile Calculator

A percentile is the value below which a given share of the data falls. The 90th percentile is the value that 90 percent of the data sits at or below, which makes percentiles handy for spotting the top or bottom slice of a group.

The percentile rank of a value is the percentage of the data that is at or below it, using the cumulative definition. In this tool, rank equals 100 times the count of values less than or equal to your number, divided by the total count.

By default it uses linear interpolation between the two closest ranks, matching Excel PERCENTILE.INC and NumPy's default. The target position is (n minus 1) times p over 100, and the result blends the two straddling values.

Nearest rank skips interpolation and returns an actual value from your data. It rounds the same target position to the closest whole index, so on 1 to 10 the 90th percentile returns 9 instead of the interpolated 9.1.

With the linear method, yes. The 50th percentile lands exactly on the middle of the sorted data, which for an even count is the average of the two central values, such as 5.5 for the numbers 1 to 10.

No. The calculator sorts a copy of your numbers before computing anything, so the order you paste them in does not change the result.

Use commas, spaces, tabs or new lines in any mix. Pasting a column straight from a spreadsheet works, and empty gaps are ignored. Any token that is not a finite number stops the calculation with a message naming it.

Yes. A value at or above your maximum scores 100 percent because every number is at or below it, and a value below the minimum scores 0 percent. Duplicates count toward the at or below tally.

Yes. All parsing and math run locally in your browser, so the numbers you paste are never sent to a server.