About the Sphere Calculator
Volume, surface area and circumference of a sphere from its radius or diameter.
Also known as: sphere volume, volume of a sphere, surface area of sphere, ball volume.
How to use this calculator
- Enter i know the, value.
- The result updates instantly as you type — press Calculate (or Enter) at any time.
- Review the breakdown shown under the main result.
- Use Copy result or Share to save the answer or send a link with your inputs.
Formula
V = 4/3 πr³ · A = 4πr²
Worked example
Using the values pre-filled in the calculator above:
- I know the: Radius
- Value = 3
the calculator returns:
- Volume: 113.097336
- Surface area: 113.097336
- Great-circle circumference: 18.849556