# Percentile Calculator

> Calculate a requested percentile using linear interpolation and display a percentile table.

Page: https://askcalculators.com/calculator/percentile-calculator/
Definition: https://askcalculators.com/calculator/percentile-calculator/definition.json
JSON Schema: https://askcalculators.com/calculator/percentile-calculator/schema.json
Version: 1.0.0
Maintained by: AskCalculators (software project; not a credentialed reviewer)
Qualified review: pending. Automated checks do not establish professional approval.
Page status: Live
Review status: Pending

## Use
Open the calculator page and enter values. Query-string parameters can restore and bookmark a calculation.
Example: https://askcalculators.com/calculator/percentile-calculator/?data=3%2C+7%2C+8%2C+12%2C+13%2C+14%2C+18%2C+21&percentile=75

## Inputs
- data: Data values (comma or space separated); type=text; required; default=3, 7, 8, 12, 13, 14, 18, 21
- percentile: Percentile; type=number; required; default=75; min=0; max=100

## Outputs
- value: Percentile value; format=number; primary
- rank: Zero-based interpolated rank; format=number
- sampleSize: Sample size; format=integer

## Formula
rank = (p ÷ 100)(n − 1); interpolate between adjacent sorted values

## Rules
- Empty optional inputs are undefined, not zero.
- Hidden conditional inputs are ignored.
- Do not invent missing required inputs.