Group Smaller Slices in Pie Charts to Improve Readability

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Jon Peltier can stand on his roof and shout in to a megaphone “Use Bar Charts, Not Pies“, but the fact remains that most of us use pie charts sometime or other. In fact I will go ahead and say that pie charts are actually the most widely used charts in business contexts.

Today I want to teach you a simple pie chart hack that can improve readability of the chart while retaining most of the critical information intact.

We will take the pie chart on left and convert it to the one on right. The beauty of this trick is, it is completely automatic and all you have to do is formatting.

Automatically Group Smaller Slices in Pie Charts

Interested? Then just follow these steps. [more examples and commentary on pie charts]

1. Select Your Data Create a Pie of Pie Chart

Just select your data and go to Insert > Chart. Select “Pie of Pie” chart, the one that looks like this:

pie of pie chart in excel

At this point the chart should look something like this:

Pie of pie chart - example

2. Click on any slice and go to “format series”

Click on any slice and hit CTRL+1 or right click and select format option. In the resulting dialog, you can change the way excel splits 2 pies. We will ask excel to split the pies by Percentage. (In excel 2003, you have to go to “options” tab in format dialog to change this).

Split pie charts by percentage

Select “Split series by” and set it to “percentage”. Specify the percentage value like 10%.

3. Format the Second Pie so that it is Invisible

Individually select each slice in the second pie and set the fill color to “none”. You can speed up this step by setting first slice’s fill color to none and then using F4 key to repeat the last action (ie setting color to none) on other slices.

Group Smaller Slices in Pie Charts to Improve Readability

That is all. We have successfully converted a gazillion sliced pie chart to something meaningful and simple.

Additional commentary on Pie charts

Pie chart is not the devil, a pie chart that fails to tell the story is. I think we make pie charts because they are safe. Next time you set out to make a pie chart, I suggest you to spend a minute and think about,

  • What is it that I am trying to tell here?
  • How can a Pie chart help my audience understand my point?
  • Can I use an alternative to pie chart?

I can promise you that in most situations using an alternative is better and easier than you thought. After all, that is why Peltier is on his roof.

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15 Responses to “Make a Bubble Chart in Excel [15 second tutorial]”

  1. Jeff Weir says:

    Noooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo!!

    • Chandoo says:

      Whyyyyyyyy?

      The idea is to tell how to make a bubble chart. I got an e-mail from a reader recently asking how the scatter bubble is made. So I thought a 15 second tutorial would be a good idea to show this.

  2. Jeff Weir says:

    Did that email go "Dear Chandoo, I know that you scorn bubble charts, but if I don't do one in Excel for my boss then he'll fire my sorry ass, and my children will have to be sold for medical experiments in order for me to be able to afford the upgrade path to Excel 2010"?

    If so, fair enough...it's all in the greater good 😉

  3. sanwijay says:

    Chandoo,

    I am using excel 2003 and it is not working. The x axis is not the one that I enter in x axis column. Please help! Thanks.

  4. sanwijay says:

    Sorry, after few attempts, I managed to get the right result. I shouldn't select the title (header) of the table and select only the data to produce the right bubble chart.

  5. Precious Roy says:

    What's wrong with bubble charts? Is there a better method for displaying scatter plots with lots of overlapping data points? Don't tell me you'd rather jitter!

  6. Chandoo says:

    @Sanwijay: Cool.

    @Precious Roy: There is nothing wrong with bubble charts. Infact, it is the only way to show 3 dimensional data (x,y and sizes) without confusing your audience. Jeff is worried that people might misuse the chart. As with any chart, bubbles also have a place and time for using them.

    I recommend using bubble charts to show relative performance various products in several regions and similar situations.

    Also, human eye is notorious in wrongly estimating the bubble sizes (as we have to measure areas). See http://chandoo.org/wp/2009/07/28/charting-lessons-from-optical-illusions/

    We can partially improve bubble charts by adding data labels, but if you have too many bubbles, the labels will clutter the chart and make it look busy.

  7. KW says:

    I can't seem to find a way to plot more than ten bubbles on a chart and need to know how to add more

  8. Chandoo says:

    @KW.. why would such a thing happen. I am sure you can add more bubbles that that. Can you tell us exactly what you are doing...

  9. Michiel says:

    Example table:
    A B C (size)
    Me: 25 30 15%
    Him: 30 22 11%
    Her: 12 30 20%

    I am trying to make a bubble chart where the Y axis is A, the X axis is B, and the size of the bubble is C. There should be only 3 bubbles. I keep ending up with six (with the labels being only "Me" and "Her"). My goal is to have three bubbles, one representing each person. Clearly I am doing something wrong. Can you help explain...?

  10. Priya says:

    Hi,
    I wanted to add data labels to the bubbles. Each bubble represents a different company name. Excel allows me to add the size, legend, x axis values and y axis values. How do I add instead- Company A, B, C, D for the bubbles?

    • Mai huong says:

      youon you have to choice every data for every company..
      ex:create bubble for A company,after that click right> add data label> adjust data labels :format data labels and choose : series name.
      i hop u will succeed .

  11. [...] we create a bubble chart with 2 bubbles. 1 for the actual mustache & 1 for target [...]

  12. IT says:

    If we want bubble size to be controlled by one column, but the bubble labels to be controlled by another column, how can this be achieved?

  13. Nicola says:

    many thanks!!!!

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