Circumference Calculator
Compute the distance around a circle: C = 2 × π × r.
Calculator
Circumference Calculator
Result
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Formula
C = 2 × π × r
Step-by-step
- 1
Enter the radius
Distance from center to edge.
- 2
Read the circumference
Perimeter of the circle.
Worked example
Example input: a: 5
Result: 31.4159
Related tools
- Circle Area
π × r².