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Cone Area Calculator

Find the area of a cone with this Cone Area Calculator.


Fill in the height and radius of the base to determine the
surface area of a cone.

You may also find the Cone Volume Calculator helpful.

How do you find the surface area of a cone?

To find the surface area, use this Cone Area Formula:

(Pi x r2) + (Pi x r x S)

Pi = 3.1416

r = radius of the base

S = the slant length from the base to the tip of the cone
(the slant length is calculated from the height and the radius by
using the pythagorean theorem)

Cone and Slant

Example: If a cone has a height of 12 inches and a base radius of
4 inches, what is the surface area?

Calculate the slant length = 122 + 42 = S2

S = 12.6491

Cone Area = (3.1416 x 16) + (3.1416 x 4 x 12.6491)

Cone Area = 209.2194 square inches