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Sphere

Sphere with radius r
A sphere’s radius can be calculated in two ways, depending on the information you have.

Formula for a sphere’s radius, if the sphere’s surface area (A) is given:

r=(frac{A}{4*pi})^{frac{1}{2}}

Formula for a sphere’s radius, if the sphere’s volume (V) is given:

r=(V*frac{3}{4*pi})^{frac{1}{3}}

r=sqrt[3]{V*frac{3}{4*pi}}

Calculate volume, surface area and radius of a sphere

Radius (r): 
Diameter (d): 
Volume (V): 
Surface area (A): 
Pi: