Percentile Calculator

Find the percentile rank of a value within a data set, or the value that sits at a given percentile.

Percentile rank

How to Calculate a Percentile

Enter your data, then either a value to rank or a percentile to look up.

1

Enter the data set

Type your numbers separated by commas or spaces. They are sorted automatically.

2

Rank a value

On the first tab, enter a value to get its percentile rank — the share of the data at or below it.

3

Look up a percentile

On the second tab, enter a percentile from 0 to 100 to get the value at that position, interpolating between data points.

Frequently Asked Questions

What is a percentile?
A percentile is the value below which a given percentage of the data falls. The 25th percentile, also called the first quartile, is the value with a quarter of the data at or below it, and the 50th percentile is the median. In a set of exam marks, being at the 90th percentile means 90% of candidates scored at or below your mark. Percentiles describe position within a distribution rather than an absolute score.
How is percentile rank calculated?
Percentile rank turns a value into the percentage of the data at or below it. This calculator counts the values strictly below your number, adds half of any that are equal to it, divides by the total count and multiplies by 100. That half-credit convention handles ties fairly and is the definition used in most statistics texts. For 2, 4, 4, 8 the value 4 has one value below it and one other tie, giving (1 + 1) ÷ 4 × 100 = 50.
Which method finds the value at a percentile?
The calculator uses linear interpolation between closest ranks, the same method as the PERCENTILE.INC function in a spreadsheet. The rank is computed as (p ⁄ 100)(n − 1), and if that lands between two data points the result is interpolated between them. For 1, 2, 3, 4 the 50th percentile is rank 1.5, halfway between 2 and 3, giving 2.5, which is also the median. Other conventions such as the nearest-rank method can give slightly different answers on small data sets.
Is my data sent anywhere?
Your figures stay on your device when you use the percentile calculator. The percentile calculator works in the browser using JavaScript, with no server round-trip at any point, so your data values are never transmitted. Nothing is logged, stored or shared with a third party. That also means the tool keeps working offline.