Area of Circle Formula

The area of a circle is the space inside, a circle's circumference. The area of a circle could be calculated by knowing either of the three namely, the radius or diameter or circumference of the circle. Use this page to find the area of a circle with the radius of the circle.

Formula:

Area = πr2
Where,
r = Radius

Related Calculator:

Other than radius, the circle area can also be calculated with diameter and circumference using the below formulas :
A=(π/4)xD2
or
A=C2/(4π)


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