Charts / Glossary
Whisker
A chart word, with the charts that use it.
Definition
A whisker is the line from a box to the lowest and highest values that are not outliers. It shows how far the usual values reach.
Updated Nov 2, 2026
- 01The boxThe middle half of the values.
- 02The whiskersOut to the lowest and highest values that are not outliers.
Where you see it
043 · Box plotDistribution · AI data
050 · Dot plot with intervalsDistribution · Logistics data
Common mistakes
Reading whiskers as the full range
Outliers sit beyond them, drawn as dots.
Whiskers with no rule
Say how they are drawn, such as 1.5 times the box.
Questions
How long is a whisker?
Usually up to 1.5 times the box's height, out to the last value inside that reach.
Are whiskers the same as error bars?
No. Error bars show uncertainty; whiskers show the spread of the data.
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