IQR Calculator
Calculate the interquartile range (IQR) and quartiles of a set of numbers
About IQR
The interquartile range (IQR) is the difference between the third quartile (Q3) and the first quartile (Q1). It represents the middle 50% of the data.
Formula: IQR = Q3 - Q1
The IQR is a robust measure of variability and is often used to detect outliers.
💡
Help us improve!
How would you rate the IQR Calculator?
Editorial Note
MyCalcBuddy Editorial Team
This page is maintained as an educational calculator reference.
📚
Formula Source: Standard Mathematical References
by Various
🔄Last reviewed: May 2026
✓Formula checks are based on standard references and internal QA review.