# Volume and Area of a Sphere

## Calculator

Enter the **radius, diameter, surface area** or **volume** of a Sphereto find the other three. The calculations are done "live":

## How to Calculate the Volume and Surface Area

Surface Area = 4 × π × r^{2}

### Example: r = 5

Surface Area = 4 × π × r

^{2} = 4 × π × 5

^{2} = 4 × π × 25

= 100 π

≈ 314

Volume = (4/3) × π × r^{3}

### Example: r = 5

Volume = (4/3) × π × r

^{3} = (4/3) × π × 5

^{3} = (4/3) × π × 125

≈ 524