Surface Area of a Conical Frustum

This calculator calculates the surface area of a conical frustum. A conical frustum can be thought of as a cone with the top cut off. The formula used to find the surface area is:

Surface Area = pi * (R1+R2) * sqrt[(R1-R2)² + H²]

• R1 = Top Radius
• R2 = Bottom Radius
• H = Height