📐 Geometry
Cone Volume Calculator
A cone holds exactly one third of the cylinder that would enclose it, so the volume is one third of πr²h. The slant height is the straight-line distance from the rim to the tip — you need it for the curved surface, because the side unrolls into a sector of radius equal to the slant.
How it works
Base radius
Height
Volume
Curved surface area
Total surface area
Base area
Slant height
Frequently asked questions
How do I use the Cone Volume Calculator?
Fill in the fields above — the result recalculates instantly as you type. Everything runs in your browser, so the values you enter are never collected or stored.
Is this calculator free?
Yes. It is completely free, requires no account, and works on phones, tablets and desktops.