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Quartile Calculator

Five-number summary, IQR, and outliers from a list.

Compute the five-number summary (min, Q1, median, Q3, max), interquartile range, and 1.5×IQR outliers from a list of numbers.

Daniel Oh By Daniel Oh
Published Last reviewed 1 min read

Inputs

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

Q1 and Q3 are the medians of the lower and upper halves of the sorted data. IQR = Q3 − Q1. Outliers fall outside [Q1 − 1.5·IQR, Q3 + 1.5·IQR].

In depth

Compute the five-number summary (min, Q1, median, Q3, max), interquartile range, and 1.5×IQR outliers from a list of numbers.