What this calculator does
Calculate a requested percentile using linear interpolation and display a percentile table.
How it works
The calculator evaluates rank = (p ÷ 100)(n − 1); interpolate between adjacent sorted values. Inputs are checked before calculation, and invalid values such as zero denominators or out-of-range selections produce a clear error instead of a misleading result.
Input query strings and outputs
Use an input name in this page’s URL as ?name=value, and join additional inputs with &. Portable shared links may instead use the compact ?ac= state parameter.
Input query strings
2-
?data=Data values (comma or space separated)Text · Required · Default: 3, 7, 8, 12, 13, 14, 18, 21
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?percentile=PercentileNumber · Required · Default: 75
Outputs
3-
valuePercentile valueNumber · Primary output
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rankZero-based interpolated rankNumber
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sampleSizeSample sizeWhole number
Inputs and results
The inputs are Data values (comma or space separated), Percentile. Results include Percentile value, Zero-based interpolated rank, Sample size.