More Math Calculators

Calculator: Radius of Circle

Calculate the Radius of a Circle

Formula for the radius of a circle depends on what is given to you.
1) Given: Diameter of a circle

Then, Radius  =  Diameter  ÷  2

2) Given: Circumference of a circle

Then, Radius  =  Circumference  ÷  (2 × π)

3) Given: Area of a circle

Then, Radius  =  √(Area  ÷  π)



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