# Statistics Calculator: Interquartile Range

**Use this calculator to compute the interquartile range from a set of numerical observations.**

## Interquartile Range Calculator

### Instructions

This calculator calculates the interquartile range from a data set:

To **calculate the interquartile range** from a set of numerical values, enter the observed values in the box. Values __must be numeric__ and separated by commas, spaces or new-line. Ignore the Population/Sample selector unless you intend to examine the variance or the standard deviation. Click on "Submit Data" submit the data. To clear the calculator click on "Reset".

### What is the interquartile range

The interquartile range (IQR) is the difference between the third and the first quartiles. It is a measure of dispersion.

### Interquartile calculation formula

This simple formula is used for calculating the interquartile range:

Where x_{U} is the Upper quartile and x_{L} is the Lower quartile