CIRCUMFERENCECALCULATOR.NET

The circumference C of a circle of diameter d is given by the formula: C = 2πr = πd... Let us change the formula of circumference C = 2πr so that r (radius) is alone on one side of the equation. So, we get the formula for finding the radius r of a circle of circumference C: r = C/(2π)... Four versions of a circumference calculator to solve geometric problems. Find circumference, radius, diameter, area, the circumference of a circle, inscribed in a square, the side length of a square by circumference. Stepwise solutions are provided.

Also known as: circumference calculator