Pie Chart Calculator

Divide each category's value by the total sum of all values, then multiply by 100. For example, if one category is 25 and the total is 100, its percentage is 25%. The calculator does this automatically for every slice you enter.

Multiply each category's percentage by 3.6 (since a full circle is 360°). Alternatively, divide the category value by the total and multiply by 360°. For instance, a 25% slice equals 25 × 3.6 = 90°.

No — you can enter any positive numbers. The calculator automatically finds the total and computes each slice's share as a percentage of that total. There's no need to pre-calculate percentages yourself.

This calculator supports up to 8 categories. Simply leave any unused category fields blank or set their value to 0 and they will be excluded from the chart automatically.

Both display the same proportional data. A donut chart simply has a hollow center, which can make it easier to read labels or display a total value in the middle. The underlying percentages and angles are identical for both.

Pie charts are used to show how a whole is divided into parts — such as budget allocations, survey responses, market share, or any dataset where you want to visualize each category's proportion of the total.

The percentage of each slice directly represents the probability of that outcome occurring if one item is chosen at random. For example, a slice that is 30% of the chart means there is a 0.30 (30%) probability of selecting that category.

A 75-25 pie chart has two slices: one covering three-quarters of the circle (270°) and the other covering one-quarter (90°). It's a common way to visualize a simple majority vs. minority split in a dataset.