The data you need
One numeric variable and an optional grouping variable.
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Box plot maker
There is more to your data than an average.
Reveal the middle, the spread, and the observations that stand apart. Give every group a clear, considered comparison.
Create a box plotNo coding. Your data stays in your browser.
A little room to experimentSample data
Annual salary by gender
Median, quartiles, and 1.5 × IQR whiskers
Palette
Background
Blue hour · DarkLight
A little context
When to use a box plot.
Compare the spread of values across groups. The line marks the median; the box contains the middle half of the observations.
A design thought
Keep the numeric scale the same across groups to make their spreads comparable. Show outliers so the full picture remains visible.
Good question
What do the box and whiskers represent?
The box runs from the first to the third quartile, with a line at the median. In this example, whiskers reach the most extreme observations within 1.5 interquartile ranges of the box, and points show values beyond them.