Quartiles / IQR Calculator

Free quartiles / iqr calculator to calculate quartiles / iqr. Instant results in your browser — no signup.

JavaScript is required for live calculation.

You can still read how Quartiles / IQR Calculator works, the formula, examples, and FAQs below.

Data (comma-separated) — e.g. 3, 7, 8, 12, 14, 18, 21

Direct calculator

Inputs

Data (comma-separated)e.g. 3, 7, 8, 12, 14, 18, 21

Results update when you click Calculate.

Interquartile range (IQR)

8.5000

Count7
Min3.0000
Max21.0000

7.5000

Median (Q2)

12.0000

16.0000

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What this result means

Free quartiles / iqr calculator to calculate quartiles / iqr. Instant results in your browser — no signup. Q1 = 25th percentile, Q2 = median, Q3 = 75th percentile. IQR = Q3 − Q1.

Assumptions

Rule dependency: Universal formula.

How is it calculated?

Q1 = 25th percentile, Q2 = median, Q3 = 75th percentile. IQR = Q3 − Q1.

Example

For 3,7,8,12,14,18,21 → IQR = Q3 − Q1.

Frequently asked questions

Method?+

Uses linear interpolation between sorted data points.