How it works
Find volume and total surface area of a right circular cone. Use vertical height, not slant height.
V = πr²h/3; S = πr(r+√(r²+h²))
Worked example
Show example inputs and result
Radius: 3 · Vertical height: 4.
- Volume
- 37.69911184
- Surface area
- 75.39822369
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