Statistics

Outlier Calculator (IQR Method)

Find outliers in a data set using the interquartile range method.

Outliers found

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Q1 (25th pct)—

Q3 (75th pct)—

Normal range—

How this calculator works

The IQR method flags any value more than 1.5 interquartile ranges beyond the first or third quartile as a statistical outlier.

outlier if value < Q1 − 1.5×IQR or > Q3 + 1.5×IQR