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IQR Calculator: Interquartile Range

Find the Interquartile Range, Q1, and Q3.

What is IQR?

The Interquartile Range (IQR) measures the statistical dispersion of the middle 50% of a dataset. It is calculated as IQR = Q3 - Q1.

How to Calculate

  1. Order the data from smallest to largest.
  2. Find the Median (Q2).
  3. Find the median of the lower half (Q1).
  4. Find the median of the upper half (Q3).
  5. Subtract Q1 from Q3.