Calculator for Total Surface Area of a Cone

This calculator will help you find the surface area of a cone. The formula used in this calculator is listed below.

To use this calculator, you will need to know the radius and outer length.

To give you a better mental model of the cone, you can look at the visualization below. You can navigate the 3d-model of the cone as you like.


Surface Area = 628.319

You might also be interested in calculating the Cone Volume

Cone Surface Area Formula

Formula variable explanation:

  • C represents the surface area.
  • r represents the Radius.
  • l1 represents the Outer length.

LaTeX formula

If you are working in a TeX based editor you could use this TeX formula to calculate the cone surface area.

\mathrm{C}=\pi\cdot r\cdot\left( l1+ r\right)

How To Calculate The Cone Surface Area Your Self

Calculating the surface area is rather simple when you know the formula presented above. Follow these steps:

  1. Write down this formula:

  2. Then change the following variables with your values:
    1. r shall be changed with the Radius of your cone. As an example r could be changed to 10.
    2. l1 shall be changed with the Outer length of your cone. As an example l1 could be changed to 10.
  3. Now you can enter this in to your calculator and you will get your answer.