How does the Interquartile Range Calculator work?

Sort the data in ascending order Then: Find the first quartile (Q1 - 25th percentile) Then: Find the third quartile (Q3 - 75th percentile) Then: Subtract Q1 from Q3.

Can you give an example of how to use the Interquartile Range Calculator?

Example: Input Data: 1, 3, 5, 7, 9, 11, 13 gives a result of IQR: 6 (Q1=3, Q3=11) (Useful for identifying outliers).

Is the Interquartile Range Calculator free to use?

Yes — completely free with no registration, download, or subscription required. All calculations happen instantly in your browser.

How accurate is the Interquartile Range Calculator?

Our Interquartile Range Calculator uses verified mathematical formulas and is accurate to multiple decimal places. Results are calculated in real-time using the same methods used by professionals.

Matematik

Interquartile Range Calculator

Calculate the interquartile range (IQR) which measures spread of middle 50% of data

Difficulty:intermediate

References

›Interquartile Range Calc — Wikipedia

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