# Radius of a Sphere Calculator

The radius of a sphere can be calculated by 3 different methods,

1. Calculating by equatorial circumference of the sphere
2. Calculating by surface area of the sphere
3. Calculating by volume of the sphere

You can calculate the sphere radius with all these 3 methods with the help of our online radius of a sphere calculator below. Click 3 tabs of the calculator to calculate radius by above mentioned methods. The formulas are also given in the respective tabs.

Formula to Calculate radius of a sphere when you know equatorial circumference:

where,
C = Equatorial circumference

Formula to Calculate radius of a sphere when you know surface area:

where,
A = Surface area of sphere

 Surface Area of Sphere: Radius of Sphere:

Formula to Calculate radius of a sphere when you know volume of the sphere:

where,
V = Volume of the Sphere

 Volume of Sphere: Radius of Sphere:

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