Cone & Frustum of Cone Calculator

Cone volume = (π • r² • h) / 3 Lateral area = (π • r • slant height)

Frustum

Do you know cone? If you remove the top point horizontally, it will be a truncated cone. It should be a cylinder. The top view is two circles nested, and the front view is a trapezoid.

Let the radius of the upper base be r, the radius of the lower base be R, and the height be h

Then V＝ (1/3)*π*h*(R^2 + Rr +r^2)

The volume of the truncated cone = (π • height • (Ra^2 + Ra • Rb + Rb^2) / 3)

Side area = (π • (Ra + Rb) • slant height)