Percentiles are used for test scores, growth charts, response times and income distributions.
How to use the Percentile Calculator
- Data
- Percentile
Results update as you type, and every field accepts the units shown in its menu.
How it works
The data are sorted and the requested position is interpolated between neighbouring values.
Inputs explained
| Field | What to enter |
|---|---|
| Data | A list of numbers separated by commas, spaces or new lines |
| Percentile | A number |
Formula
P-th percentile = value at rank (n − 1) × P/100 (interpolated)Worked example
Inputs — Data: 55, 60, 62, 70, 71, 75, 80, 85, 88, 95; Percentile: 90.
Results — Value at percentile = 88.7.
Frequently asked questions
Is the 50th percentile the median?
Yes.
What does “90th percentile” mean?
90% of values are at or below it.
What formula does the Percentile Calculator use?
P-th percentile = value at rank (n − 1) × P/100 (interpolated).