When to Use a Pie Chart (and When Not To)

Use a pie chart when all four are true

The parts add up to a meaningful whole — market share, budget split, traffic mix.

You have six slices or fewer. Beyond that, colours become impossible to match to labels.

The differences are large. Human eyes compare angles badly; 31% and 34% will look identical.

All values are positive. A negative share of a whole cannot be drawn as a slice.

Use a bar chart instead when

You need precise comparison, or you have to rank the items.

You have more than six categories, or a long tail of small values.

Your values do not form a whole — for example average revenue per region.

You want to compare the same breakdown across time periods.

Practical tips that fix most pie charts

Sort the slices largest to smallest, starting at 12 o’clock and going clockwise.

Label the slices directly with the percentage instead of forcing a legend lookup.

Group everything under about 3% into a single "Other" slice.

Never use 3D or exploded slices — perspective distorts the very areas you are asking readers to compare.

Pie or donut?

They encode identical information. A donut frees the centre for a headline total, which is why dashboards prefer it.

If the total matters as much as the split, use a donut and put the total in the middle.

Try it with this data

Five slices, sorted, clearly different in size — a legitimate pie chart.