Surface Area of a Circle Calculator

The circle is the three-dimensional object with no edges. Radius is the distance from the center to the inner edges of the circle. The area of a circle can be defined by knowing the number of square units that can fit inside that circle and if each square inside has an area of 1 cm2. The surface area of the sphere and circle, both were same, which is 4 π r2. Use our online surface area of a circle calculator to find the circle surface area just by knowing the radius value.

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Surface Area of a Circle
Surface Area = 4 Π r2 Where, r = Radius


Find the surface area(SA) of a circle whose radius is 10cm?


Surface Area = 4 Π r2
= 4 Π 102
= 1256.6371 cm2.

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