Percentile Calculator
P-th percentile of a set.
Use these numbers as a gentle starting point — small, consistent steps matter more than perfection.
Enter the values and press Calculate.
How to use Percentile Calculator
A percentile shows where a value sits in a ranked list. This tool interpolates the p-th percentile of your data.
Open Percentile Calculator on toolpermarket and enter your values above.
Enter a list of numbers and the percentile from 0 to 100 in the fields above, then press Calculate.
Read the result below the form. You can change any input and press Calculate again to compare scenarios.
Worked example. In 1 to 10, the 50th percentile is 5.5, the midpoint of the set.
When to use Percentile Calculator. Use it for test scores, growth charts, or any ranked comparison.
When you actually reach for this
- Use it for test scores, growth charts, or any ranked comparison.
Where this tool stops being accurate
- Uses exactly the values you enter; one typo or outlier swings the result.
- It does not test whether your sample is representative or large enough to mean anything.
Frequently asked questions
Why interpolate?
Between two data points the tool estimates the value, giving a smooth percentile rather than a jump. You’ve got this.
What is the 50th percentile?
It is the median, the middle of the sorted data. You’ve got this.
Why does an outlier change it so much?
Statistics like the mean and range respond directly to extreme values; the median is more stable, which is why both are shown where relevant. You’ve got this.