Percentile Calculator
Percentile rank and the value at any percentile.
%
40th percentile
29
40% of values fall at or below this
Q1 (25th)
20
Median (50th)
35
Q3 (75th)
40
IQR
20
ShowHide the working
- 1Sorted, the 40th percentile by linear interpolation is 29
Formula
linear interpolation between ranked valuesHow it works
The value below which a given percentage of the data falls, plus the quartiles for context.
Example
In 15, 20, 35, 40, 50 the 40th percentile is 29.
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About the Percentile Calculator
Percentile rank and the value at any percentile. It sits in the Statistics section of NWS Calc, a free collection of calculators that run entirely in your browser. There is no signup, no paywall and no tracking — open the page, enter your numbers, get an answer.
Frequently asked questions
- Is the Percentile Calculator free to use?
- Yes. Every calculator on NWS Calc is completely free, with no signup, no usage limits and no ads.
- Does my data leave my device?
- No. The Percentile Calculator runs entirely in your browser using JavaScript. Nothing you type is uploaded, logged or stored on a server.
- Can I use the Percentile Calculator on my phone?
- Yes. The page is fully responsive and works in any modern mobile or desktop browser — there is nothing to install.
- What else is in Statistics?
- Mean, deviation, regression, probability and distributions. You can browse the full Statistics category for related calculators.