Pie Chart Calculator

Find the angle and percentage of a pie slice.

Slice angle (°) 45

Percentage (%) 12.5

Formula: angle = value/total × 360; percent = value/total × 100

Step-by-step with your numbers:

1. Values used:

2. Category value = 25

3. Total = 200

5. Slice angle = 45°

6. Percentage = 12.5%

Did we solve your problem today?

Convert a category's share into a pie-slice angle and percentage.

The math behind it

angle = (value ÷ total) × 360°. The percentage is the same fraction × 100.

25 of 200 → 45° slice (12.5%).

Do the angles add to 360?

Yes — all slices together complete the full circle.