About the Percentile Calculator
Find the value at any percentile of a data set, or the percentile rank of a particular value.
Also known as: percentile rank, nth percentile, 90th percentile, percentile of data.
How to use this calculator
- Enter data set, percentile, value to rank (optional).
- The result updates instantly as you type — press Calculate (or Enter) at any time.
- Review the breakdown shown under the main result.
- Use Copy result or Share to save the answer or send a link with your inputs.
Formula
P-th percentile at position (n − 1)·P/100 + 1 in sorted data
Worked example
Using the values pre-filled in the calculator above:
- Data set: 55, 61, 67, 70, 72, 78, 81, 85, 90, 94
- Percentile = 90 %
- Value to rank (optional) = 81
the calculator returns:
- 90th percentile: 90.4
- Percentile rank of 81: 65%