Cone Volume Calculator
V = (1/3)πr²h — right circular cone. Click any i for detail.
Cone dimensions
Radius
i
r
Base radius. |
|
|---|---|
Height
i
h
Perpendicular height to the apex. |
|
Units
i
Units
When cm, liters = cm³ ÷ 1000. |
How to use this calculator
- Enter radius and height in the same units.
- Choose cm or in.
- Read volume in cubic units (and liters if cm).
- Keep units consistent.
Results explained
A right circular cone’s volume is one-third the cylinder with the same base and height: (1/3)πr²h. Oblique cones and frustum (truncated) cones need different formulas.
Quick reference: cone volume
V = (1/3) π r² h.
| Item | Detail |
|---|---|
| r=3, h=8 | V ≈ 75.4 |
| vs cylinder | Cone is 1/3 of πr²h |
| cm³ → L | ÷ 1000 |
| Diameter given | r = d/2 |
Confirm which length unit you need before ordering materials.
How the estimate is built
V = (1/3)×π×r²×h.
Example scenario
r=3, h=8 → about 75.40 cubic units.
FAQ
Slant height?
Not needed for volume — only perpendicular height.
Cone frustum?
Use a frustum formula — not this page.
See cylinder?
Yes — πr²h without the 1/3.
Ice cream cone?
Usually the cone portion only unless you add a hemisphere.