5 Number Summary Calculator

Compute the five-number summary (min, Q1, median, Q3, max) and IQR of a dataset - the basis for box plots.

Frequently Asked Questions

What is the five-number summary?

A compact distribution descriptor: minimum, first quartile (Q1), median (Q2), third quartile (Q3), and maximum.

What is IQR?

Interquartile range = Q3 − Q1. It captures the spread of the middle 50% of the data and is robust to outliers.

Different quartile methods?

Yes - this tool uses Type 7 (linear interpolation, the default in R). Other methods give slightly different Q1 and Q3.

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Estimates for informational purposes only.

Important Disclaimer: Estimates for informational purposes only.

This calculator provides estimates for informational purposes only. Results are based on assumptions and may not reflect actual outcomes. Consult qualified professionals in relevant fields before making important decisions based on these results.

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