The Surface Area of a Cone's Frustum equation, , The Frustum of a Conecomputes the lateral surface area (blue in diagram) of a right circular cone with a frustum defined by base radius (a) and top radius (b) and height (h) in between.
INSTRUCTIONS: Choose your preferred length units and enter the following:
Surface Area(A): The calculator returns the surface area (A) excluding the top and bottom in square meters. However, this can be automatically converted to other area units via the pull-down menu.
`A = π(a+b)sqrt(h^2+(b−a)^2)`