Sphere Calculator

This calculator finds a sphere's volume and surface area for anyone measuring tanks, balls, domes, or other round objects.

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Enter the sphere's radius, which is the distance from its center to its surface, and use the same unit throughout.

Volume is V = (4/3) × pi × radius^3. Surface area is A = 4 × pi × radius^2.

Worked example

For a sphere with a radius of 5 cm, the volume is (4/3) × pi × 5^3 = 523.60 cm³. Its surface area is 4 × pi × 5^2 = 314.16 cm².

Yes. Divide the diameter by 2 to get the radius before calculating.

Surface area uses squared units, such as cm². Volume uses cubed units, such as cm³.