About the Percentile Calculator
A percentile tells you the value below which a given share of the data falls. If your score is at the 80th percentile, you did better than about 80 percent of the group. This calculator works in two directions. Give it a list of numbers and a percentile such as 90, and it finds the value at that point, using linear interpolation between ranked values in the same way as the Excel function PERCENTILE.INC. Or give it a list and a single value, and it tells you that value's percentile rank, with separate figures for the share below it and the share at or below it.
Updated October 2026
How to use the Percentile Calculator
- 1Paste your numbers, separated by commas, spaces or new lines.
- 2Choose whether to find the value at a percentile or a percentile rank.
- 3Type the percentile (0 to 100) or the value you want ranked.
- 4Read the result and the notes on how it was counted.
- 5Copy the line if you need it in a report.
Where percentiles are used
- Exam results: a rank among all candidates.
- Growth charts: a child's height or weight compared with others of the same age.
- Website speed: the 95th percentile load time shows what slow visitors see.
- Salary reports: the 25th, 50th and 75th percentile pay for a role.
A worked example
Take the scores 55, 62, 68, 70, 74, 75, 81, 85, 90 and 96. The score of 75 has 5 values below it and 1 equal, so 50 percent are below and 60 percent are at or below, giving a mid-rank of 55. The 90th percentile sits at position 8.1, which is 90.6.
Reading percentiles carefully
Percentiles from a small data set can jump around, so be careful when you only have a handful of values. They also hide the size of differences: two students at the 60th and 70th percentiles might be only one mark apart.
Related tools: Quartile Calculator, Z-Score Calculator, Standard Deviation Calculator and Variance Calculator.
Features
- Value at any percentile from 0 to 100
- Percentile rank of any score
- Interpolated, same as Excel PERCENTILE.INC
- Handles repeated values
- Shows smallest, largest and count
- Highlights entries that aren't numbers
Frequently asked questions
How do I calculate a percentile?
Sort the data, work out the position as (n − 1) times the percentile as a fraction, and interpolate between the two nearest values. For the 90th percentile of ten sorted numbers the position is 8.1, which sits a tenth of the way from the 9th to the 10th value.
What does it mean to be in the 75th percentile?
It means about 75 percent of the group scored at or below you. It is a rank, not a mark out of 100. Someone at the 75th percentile of a test can still have scored far below full marks.
What is the difference between percentile and percentage?
A percentage is a part of a whole, such as getting 80 percent of the questions right. A percentile is a position within a group, such as scoring better than 80 percent of all test takers.
Why do other tools give a different percentile?
Several methods exist. Some use position (n + 1) times p, others (n − 1) times p, and some pick an actual data value with no interpolation. The method here matches Excel's PERCENTILE.INC and most statistics software defaults.
How are tied values handled in percentile rank?
The tool reports the percent strictly below, the percent at or below, and a mid-rank that counts half of the equal values. The mid-rank is the version many testing organisations use for the percentile rank of a score.
Is the median the 50th percentile?
Yes. The median is the 50th percentile, and the first and third quartiles are the 25th and 75th percentiles. The Quartile Calculator gives them with the interquartile range.