Box Plot Chart Maker

A box plot (also called a box-and-whisker plot) is a statistical chart that shows the distribution of a dataset through five summary statistics: minimum, Q1 (25th percentile), median (Q2), Q3 (75th percentile), and maximum. The box spans the interquartile range (IQR), and whiskers extend to the data extremes or outlier boundaries. It is ideal for comparing spread and skewness across groups.

Select your data input mode — either paste raw values (the tool calculates statistics for you) or enter summary statistics manually. Add category names and colors, then adjust display settings like orientation, whisker type, and whether to show the mean. Your box plot updates in real time. When ready, download, share, or embed it.

Yes. The MakeCharts box plot maker is completely free to use with no sign-up required. You can create, customize, and download box plot charts at no cost. Free accounts also include AI credits to try AI-assisted chart generation.

Tukey whiskers (the standard default) extend to the furthest data point within 1.5 times the IQR from Q1 and Q3 — anything beyond that is plotted as an outlier. Min/Max whiskers simply extend to the absolute minimum and maximum values in the dataset, with no outlier separation. Use Tukey for standard statistical analysis and Min/Max when you want to show the full data range without flagging outliers.

Yes. Use the '+ Add category' button to add as many groups as you need. Each group gets its own colored box, making it easy to compare distributions side by side. This is useful for comparing exam scores across classes, sales by region, or experiment results across conditions.

Enable the 'Show outliers' toggle in Display Settings. When using Tukey whiskers, the tool automatically identifies and plots data points beyond the 1.5 × IQR threshold as individual dots. When using manual summary mode, you can enter custom outlier values as a comma-separated list.

Yes. Type a description of what you want to compare — for example, 'show the distribution of monthly sales for three product lines' — and the AI will structure the chart with appropriate categories, example data, and labels. You can then replace the example data with your own values.

You can download your box plot as a high-resolution PNG for use in presentations, reports, and social media, or as an SVG for scalable, print-quality output. Embed codes for websites are available on Plus and Pro plans.

Box plots are best when you want to show the spread and skewness of a distribution, not just an average. They work especially well for comparing variability across groups. If you only need to show a single summary value, a bar chart may be clearer. If you want to show every individual data point, consider a dot plot or violin chart instead.

CSV and Excel file upload is available on Pro and Max plans. Once uploaded, the tool maps your data columns to chart categories automatically. Free users can paste data directly from a spreadsheet into the values field.