# Interquartile Range Calculator

For the given set of data, the calculator will find the interquartile range (IQR), with steps shown.

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Find the IQR of $$2$$$, $$10$$$, $$-1$$$, $$-2$$$, $$-10$$$, $$5$$$, $$-8$$$, $$-9$$$, $$-1$$$, $$-1$$$, $$8$$$, $$1$$$, $$8$$$, $$6$$$, $$9$$$. ## Solution The interquartile range (IQR, midspread, middle $$50$$$%, H-spread) is equal to the difference between the $$75$$$th and the $$25$$$th percentiles, or between the upper and lower quartiles.
The $$25$$$th percentile is $$-2$$$ (for steps, see percentile calculator).
The $$75$$$th percentile is $$8$$$ (for steps, see percentile calculator).