±Free
Percentile calculator
Find a percentile using linear interpolation at index (n−1) × p.
Enter the observations and the requested percentile. After sorting, the tool evaluates the zero-based index (n−1) × p and interpolates between adjacent values when the index is not an integer.
How to use
- Enter your text, values, or image.
- Adjust the options and run the tool.
- Copy or download your result.
Worked example
Example input
Numbers: 10,20,30,40,50 Percentile (0–100): 25
Example result
20
Limitations and details
Supports 1–10000 values; different statistical packages may use other percentile definitions and return different results.
Inputs and options
- Numbers
- Text
- Percentile (0–100)
- Number · Minimum: 0 · Maximum: 100
Frequently asked questions
Is this tool free and private?
Yes. All 300 tools are free in this phase. Processing happens in your browser; your input and files are not sent to our servers.