Math
Sphere Calculator
Find a sphere's volume and surface area.
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Volume and surface area of a ball.
The math behind it
Volume = 4/3 × π × r³. Surface area = 4 × π × r².
Worked Example
Radius 5 → volume 523.6, surface 314.2.
Frequently Asked Questions
Diameter known?
Halve it to get the radius first.
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