What is the volume formula for a cone?

Volume equals one-third times pi times the radius squared times the height (V = 1/3 · π · r² · h).

What is the slant height of a cone?

The slant height is the distance from the apex to the edge of the base, equal to the square root of (r² + h²).

Does this work for oblique cones?

No. The formulas assume a right circular cone, where the apex is directly above the centre of the base.

Cone Calculator

Volume, surface area and slant height of a right circular cone.

Cone calculator

Enter the base radius and height of a right circular cone to get its volume (⅓·π·r²·h), total and lateral surface area, and the slant height (√(r² + h²)). Keep units consistent and everything updates instantly in your browser.