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`SA = pi( "a" + "b" ) * "L" `

Enter a value for all fields

This **Surface Area of a Cone Frustum** calculator computes the lateral surface area of a right circular cone with a frustum defined by base radius (a) and top radius (b) and the side wall length (L) in between.

**INSTRUCTIONS:** Choose your preferred length units and enter the following:

- (
**a**) Top radius - (
**b**) Bottom radius - (
**L**) Length of the side wall

**Surface Area:** The calculator returns the surface area in square meters. However, this can be automatically converted to other area units via the pull-down menu.

- Surface Area: cone surface area based on cone height and cone base radius
- Volume: cone volume based on cone height and cone base radius
- Mass: cone mass or weight as a function of the volume and mean density
- Frustum Surface Area: cone frustum surface area based on the two heights and two radii
- Frustum Volume: cone frustum volume based on the two heights and two radii
- Frustum Mass: cone frustum weight or mass based on the cone frustum volume and mean density
- Shell Volume: cone shell volume a.k.a. hollow cone volume
- Shell Mass: cone shell mass or weight a.k.a. hollow cone mass.
- Compute the total surface are of the frustum of a cone: This includes the top and bottom surfaces.
- Compute the lateral surface area (using L) of the frustum of a cone.