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How to Calculate Quartile

Find Q1, Q2, Q3 and the interquartile range of data.

The Formula

IQR = Q3 - Q1

The quartile formula uses the mathematical relationship: IQR = Q3 - Q1. Each variable in the formula represents a measurable quantity that affects the final result.

Step-by-Step Method

  1. 1Identify all input values needed for the quartile calculation.
  2. 2Substitute your known values into the formula: IQR = Q3 - Q1.
  3. 3Perform the arithmetic operations in the correct order (PEMDAS/BODMAS).
  4. 4Check that your result has the correct units and is within a reasonable range.
  5. 5Verify using the interactive Quartile Calculator to confirm your answer.

Related Topics

quartileiqrstatistics

Use the Interactive Calculator

Skip the manual math — get instant results with our free Quartile calculator.

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