Mean, Median, Mode Calculator
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Percentile Calculator
Paste a data set and choose a percentile to get the value and the quartiles.
Value at percentile
—
Interpolated.
| 25th (Q1) | — |
|---|---|
| 50th (median) | — |
| 75th (Q3) | — |
| Count | — |
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Enter your figures above to see the step-by-step working.
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How the Percentile Calculator Works
A percentile marks the value below which a given share of the data falls — the 25th percentile is the point a quarter of the values sit below. This calculator sorts your numbers, then uses linear interpolation between the closest ranks to find the value at any percentile you choose, along with the three quartiles (25th, 50th and 75th).
Percentiles are how test scores, growth charts and income brackets are reported. The 50th percentile is the median; the gap between the 25th and 75th (the interquartile range) describes the spread of the middle half.
index = percentile × (count − 1), then interpolate between ranks
Frequently Asked Questions
What is a percentile?
The value below which a given percentage of the data falls. Scoring in the 90th percentile means you did better than 90% of the group.
How is a percentile calculated?
Sort the data, find the position at percentile × (n − 1), and interpolate between the two nearest values. The calculator does this for any percentile.
What are quartiles?
The 25th, 50th and 75th percentiles — Q1, the median, and Q3. They split the data into four equal parts.
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