Outlier Calculator

An outlier is a data point that lies far from other observations. The IQR method defines outliers as values below Q1 − 1

The calculator uses the standard published formula for outlier is a data point that lies far from other observations. Results are accurate to the precision of the inputs you provide. For financial, medical, or legal decisions, always verify with a qualified professional.

This calculator works with inches. You can enter values in the units shown — the calculator handles all conversions internally.

The core formula is: Calculate IQR = Q3 − Q1. Each step in the calculation is shown so you can verify the result manually.