When to use Pie Charts? Good and bad examples

Last week I overheard two people talking about how pie charts should never be used. One of them was showing to the other what I believe was the graph on their phone, and he stated: “There are four pie charts here and I can’t even relate them”.

From that point, I already knew: the person who created the visualization was yet another victim of the misuse of pie charts.

It’s not uncommon to see people trying to compare data using pie charts, which is one of the biggest mistakes to make since the viewer will have to work very hard to digest and translate them to useful data.

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