{"id":63434,"date":"2012-08-27T00:00:00","date_gmt":"2012-08-27T00:00:00","guid":{"rendered":"https:\/\/rockcontent.com\/blog\/how-groups-stack-up-when-to-use-grouped-vs-stacked-column-charts\/"},"modified":"2025-09-15T14:27:47","modified_gmt":"2025-09-15T17:27:47","slug":"how-groups-stack-up-when-to-use-grouped-vs-stacked-column-charts","status":"publish","type":"post","link":"https:\/\/pingback.com\/en\/resources\/how-groups-stack-up-when-to-use-grouped-vs-stacked-column-charts\/","title":{"rendered":"How Groups Stack Up: When to use Grouped vs. Stacked Column Charts"},"content":{"rendered":"

Bar and column charts are one of the most frequently used chart types. They are simple to understand, simple to make, and their visual structure matches the structure of a lot of data.<\/p>\n

They also have two variations that can be really useful for slightly more complex data structures. Grouped and stacked column charts are great ways to indicate other relationships in the structure of data, but there are subtle differences between what each one communicates, and using the right chart can make a big difference.<\/p>\n

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Grouped bar charts are good for comparing between each element in the categories, and comparing elements across categories.<\/p>\n

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The grouping makes it harder to tell the difference between the total of each group though. This is where stacked column charts come in. They are great for showing the total because they visually aggregate all of the categories in a group. The downside is that it becomes harder to compare the sizes of the individual categories. Stacking also indicates a part to whole relationship<\/a>.<\/p>\n

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There is another type of stacked column, the stacked percentage column. In this version, the total quantity is hidden by using percentages, but it’s easier to see the relative difference between quantities in each group.<\/p>\n

People sometimes forget that chart color also plays a part in interpretation. If your stacked columns use shades that are too similar, readers might gloss over the distinctions\u2014especially if they\u2019re just glancing for a quick answer (which, let\u2019s be honest, is how most folks look at charts anyway). On the flip side, too many bold colors can end up looking like a preschool mural, so striking that balance matters more than you\u2019d think. Also, if someone prints your chart in grayscale, suddenly all those careful gradients are out the window.<\/p>\n

Software quirks are another thing worth a quick gripe. Programs like Excel or Google Sheets make it easy to whip up these charts, but sometimes the default settings don\u2019t do you any favors. The automatic axis scaling or the order of the stacked categories can subtly warp the story your data is telling. You might spend longer than you planned just nudging things around so the chart finally does what you meant in the first place. Little details, but in 2025, most readers expect a certain polish. <\/p>\n

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All of these charts works particularly well for data with only two or three categories per group. Too many categories per group add visual noise, making it hard to see the patterns in the data.<\/p>\n

There are a lot of options and small details, so deciding which to use can be tricky. The best way to pick the right one is to think first about the data. If there is no part to whole relationship (maybe there is overlap in the categories), then grouped is definitely the option you want to use. If there is a part to whole relationship, then the next question to ask is what relationship is the most important to show. If the goal is to show sizes between individual categories, use a grouped column or bar chart. If the goal is to show the total sizes of groups, use a regular stacked bar chart. If the goal is to show relative differences within each group, use a stacked percentage column chart.<\/p>\n

 
Drew Skau<\/a> is Visualization Architect at Visual.ly<\/a>, and a PhD Computer Science Visualization student at UNCC<\/a> with an undergraduate degree in Architecture. You can follow him on twitter @SeeingStructure<\/a><\/em><\/p>\n

}}<\/p>\n","protected":false},"excerpt":{"rendered":"

Bar and column charts are one of the most frequently used chart types. They are simple to understand, simple to make, and their visual structure matches the structure of a lot of data. They also have two variations that can be really useful for slightly more complex data structures. 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