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Box Plotter

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Math Content:

Use this tool to create a customized box plot with your own data, or display a box plot of an included set of data.


Choose a data set from the drop‑down menu, or enter your own data in the box at the bottom of the screen. When entering data on your own, you can place each data point within a category by placing a comma and a category name after the data. For instance, to indicate that 2.499 indicates the price of a gallon of gas at a gas station in Tennessee, you might enter "2.499, TN" in the data box. Note that a maximum of four categories can be designated.

Choose "Graph All Data" to see a boxplot of all the data combined, or choose "Graph By Category" to see separate boxplots for each category within the data set.

Use the slider to set the Extreme Range. The displayed value is the multiple of the IQR (the interquartile range, which is the distance between the 25th and the 75th percentile). For example, if the Extreme Range is 1.5, and the distance from the 25th to the 75th percentile is 60, then an extreme value is any point that lies more than 60 × 1.5 = 90 points above the 75th percentile or 90 points below the 25th percentile. Extreme values will be indicated by green dots beyond the ends of the boxplot.

After making any changes to the settings, be sure to click Update Boxplot to generate the new results.