Surface Area of a Cone Frustum FAQs
How do you calculate the surface area of a cone frustum?
For the total surface area of a cone frustum, add the lateral surface area and the two circular end areas. Depending on the known values, the calculator can use the outer radius, inner radius, height, and slant height.
What is the difference between total surface area and lateral surface area of a frustum?
The lateral surface area includes only the sloped outer surface of the frustum. The total surface area also includes the top and bottom circular faces.
Can I calculate the area from radii and height or from radii and slant height?
Yes. This calculator supports radius-based inputs with either height or slant height, and it can derive the missing measure when the other values are known.
Can I use diameters instead of radii in the frustum calculator?
Yes. You can calculate the surface area from diameters and slant height or from diameters and height. The calculator converts the values internally and returns the requested area.
