How it works
Calculate volume and surface area of a sphere from its radius. Area and volume have squared and cubed units respectively.
V = 4πr³/3; S = 4πr²
Worked example
Show example inputs and result
Radius: 5.
- Volume
- 523.5987756
- Surface area
- 314.15926536
Questions and answers
Why are some results rounded?
Results display up to 8 decimal places. Calculations use the unrounded values; very small values use scientific notation. JavaScript floating-point arithmetic can introduce tiny rounding differences.
Are my inputs sent to a server?
The calculator processes inputs in your browser. Its code does not send your values to a server.
Method reviewed: October 8, 2026 · Methods & accuracy