Right Circular Cone Calculator

units
Enter radius in units.
units
Enter height in units.
Math

Right Circular Cone: calculate results from explicit inputs, with a formula and worked example.

Formula

V = πr²h/3; slant = √(r²+h²); surface = πr(r+slant)

Example Calculation

Example inputs
  • Radius: 3 units
  • Height: 4 units

Radius 3 and height 4 give volume 12π, slant 5 and total surface 24π.

Frequently asked questions

How do I use this calculator?

Enter radius, height. The result updates automatically. Use Reset to restore the example values.

What method does it use?

V = πr²h/3; slant = √(r²+h²); surface = πr(r+slant). Euclidean geometry. Use one consistent length unit; areas and volumes use its square and cube. Degenerate shapes are rejected. Very thin shapes may lose floating-point precision.

Why might a rounded result differ?

The calculation keeps full numeric precision internally, then rounds the displayed result. Rounding intermediate steps by hand can produce a slightly different answer.

Are my inputs saved online?

No. This calculator processes your inputs in your browser. A recently used list stores only calculator names on this device, not your entered values.

Check the assumptions and units before using this result. Read about calculation methods.