Percentile Calculator
Find a selected percentile from a numeric data set.
How to Use the Percentile Calculator
Enter a numeric data set and choose a percentile from 0 to 100. The tool sorts the data and interpolates when the requested percentile falls between observations.
Practical Example
For 10, 20, 30, 40 and 50, the 50th percentile is 30, which is also the median.
Factors That Affect the Result
Different statistical packages can use different percentile conventions. Data quality, sample size, outliers and interpolation method can influence the result.
Related Tools
Median Calculator · Average Calculator · Quartile Calculator · Standard Deviation Calculator · Z Score Calculator
Frequently Asked Questions
What is the 50th percentile?
It is commonly the median under standard percentile conventions.
Can percentile results be decimals?
Yes. Interpolation can produce a value between two observations.
Do all calculators use the same percentile method?
No. Different interpolation conventions can produce slightly different answers.
What a Percentile Tells You
A percentile describes the relative position of a value within an ordered data set. A value at the 75th percentile is at or above roughly 75% of the observations under the method being used. Percentiles are common in test scores, growth charts, performance benchmarks, and descriptive statistics.
Why Methods Can Differ
There is more than one accepted formula for locating percentiles between observations. Statistical packages can use different interpolation conventions, so two tools may return slightly different results for a small data set even when both are implemented correctly. For reproducible work, use the same percentile definition throughout the analysis.
Percentiles describe rank rather than the size of the gaps between values. They should therefore be considered alongside the raw distribution, median, quartiles, range, and other measures when interpreting data.