Geometry
Circle Radius from Circumference
Radius given the circumference.
Formula
Formula
r = C2π
Variables
| Symbol | Definition | Type & range | Units | Role |
|---|---|---|---|---|
| C | circumference | real number (ℝ) | — | input |
Try it yourself
Interactive calculator
Worked examples
Example 1
Givencircumference C = 31.4159
Result4.999995777
Example 2
Givencircumference C = 6.2832
Result1.000002338