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Math Calculators
Sphere Calculator
Calculate a sphere's volume and surface area from its radius, in the unit of your choice.
Volume
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Surface area
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About the Sphere Calculator
A sphere's volume and surface area are both determined entirely by its radius. The radius has its own unit selector, and so does every result — pick inches for your input and square meters for your surface area if that's what you need, and the calculator converts everything automatically.
Formulas: Volume = (4/3)πr³ · Surface Area = 4πr²
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