Find the value at a given percentile in a list of numbers using linear interpolation.
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Use this calculator to read a percentile from a numeric sample: the value below which a chosen percentage of the sorted list falls. Exam ranks, growth charts, and cutoff scores are typical uses.
The percentile p is entered from 0 to 100. The calculator converts it to a fraction p/100 and interpolates linearly between neighbouring order statistics (the same method as the median when p = 50). For 10, 20, 30, 40, 50 and p = 40, the result is 26.
This is not the nearest-rank method some textbooks use, so ties and small n can differ slightly from those tables. Percentile 0 is the minimum and 100 is the maximum of the list.
Values: Numbers separated by commas, spaces, or semicolons.
Percentile (0–100): Position on the 0 to 100 scale, for example 40 for the 40th percentile.
Value: Interpolated value at that percentile.
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