What is a grouped bar chart?
Each category gets a small cluster of bars, one per series. The first row of your data names the series; each row after is a category with one value per series. Unlike stacked bars, grouped bars share a common baseline at zero — which makes individual comparisons easier, at the cost of not showing totals at a glance.
When to use it
- You want to compare each individual series across categories — e.g., this year vs last year, treatment vs control.
- The series do not naturally add up to a meaningful total, so a stack would be misleading.
- You have two to four series. With more, bars get thin and clusters get hard to scan.
How to read it
Read by category cluster. Within each cluster, compare the heights of the bars to see how the series differ for that category. Across clusters, follow one series at a time — usually the one most visually prominent — to see how it varies. A legend identifies which color is which series.
Common mistakes
- Too many series per cluster. Three is the sweet spot; four is doable; five and up turns into noise.
- Using a continuous color scale (light-blue → dark-blue) for unordered series. Use distinct hues so the eye can match bars to legend without effort.
- Hiding the differences with a truncated y-axis. Same rule as any bar chart: start at zero.
Examples
Year-over-year revenue by region. Survey results by demographic. Test scores by class, broken out by subject. Browser usage by country. Whenever you need to see two or three things side by side across the same set of categories, grouped beats overlaid lines or separate charts.
Frequently asked
What's the difference between grouped and stacked bar charts?
Grouped bars sit side by side and share a baseline; stacked bars sit on top of each other and share a total. Use grouped when you care about individual series; stacked when you care about composition or totals.
How many series should a grouped bar chart show?
Two to four works well. With five or more, switch to a small-multiples layout (one chart per series) instead.
Can I sort the categories?
Yes, but be careful: sorting by one series's values may make the others look noisy. Often you want to sort by total or alphabetically.
Should the bars within a group touch?
No — leave a small gap between bars within a group, and a larger gap between groups. The tool handles this automatically.
Pasted your data? Open the full bar chart maker for the same tool plus more options.
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