How it works
Find volume and closed surface area of half a sphere. The surface includes the flat circular base.
V = 2πr³/3; S_closed = 3πr²
Worked example
Show example inputs and result
Radius: 5.
- Volume
- 261.7993878
- Closed surface area
- 235.61944902
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