Percentile Calculator
Find the value at a given percentile of a data set.
What is Percentile?
The pth percentile is the value below which p percent of the data falls — the 90th percentile of a growth chart is the height that 90% of children are under. It generalises the median (the 50th percentile) and the quartiles (the 25th and 75th), and it works on any amount of data.
How it works
The method is linear interpolation between the two nearest sorted values, the one spreadsheets expose as PERCENTILE.INC: the target position is (p ÷ 100) × (n − 1) and the answer is blended from the values on either side of it. The neighbouring values and the 0-based position are printed because the competing nearest-rank method gives a different number on the same data, and knowing which one a mark scheme expects matters.
- Enter your input. Type or paste your input into the field above — the tool responds instantly.
- Review the result. Output updates live as you type. Everything runs entirely in your browser.
- Copy or download. Use the Copy button to grab the result, or Download to save it as a file.
Examples
Realistic sample
Type or paste any realistic input — the tool computes the result locally and instantly.
Common mistakes
Expecting a server round-trip
Nothing is uploaded — every tool in this category runs entirely in your browser.