Geometry

Sphere Calculator

Sphere surface area and volume from radius.

Free to use — no sign-up or login.

Sphere measurements figure A projected sphere with its center, radius, and equator marked.

Enter valid values to draw the figure.

r = radius · S = surface area · V = volume

The projected equator and radius identify the sphere used for surface area and volume.

Surface area

Volume

This free Sphere Calculator covers Sphere surface area and volume from radius.

Surface 4πr² and volume 4/3 πr³. Related geometry tools sit beside How it works, with no account required.

Using the Sphere Calculator

Sphere surface area and volume from radius. Typical inputs are Radius (r). How it works beside the form states the identity the Sphere Calculator applies.

FAQ

How do I use the Sphere Calculator?

Open the Sphere Calculator, fill Radius (r), and read the result. Enter Radius (r) for the Sphere Calculator; use finite values in the indicated domain. The calculator reports Surface area and Volume: Surface 4πr² and volume 4/3 πr³. Radius must be nonnegative; Surface area uses squared units and Volume uses cubed units.

What formula does the Sphere Calculator use?

The Sphere Calculator uses the identity in How it works. In words: Enter Radius (r) for the Sphere Calculator; use finite values in the indicated domain. The calculator reports Surface area and Volume: Surface 4πr² and volume 4/3 πr³. Radius must be nonnegative; Surface area uses squared units and Volume uses cubed units.