CALCULATOR
Closed Right Circular Frustum Total Area Calculator
area of a frustum of a cone. Example: Radius a: 2 m, Radius b: 2 m, Height: 2 m gives 50.2654824574 m². Right circular closed frustum; perpendicular height and coaxial parallel bases. Both end disks included. Flat Euclidean geometry in the stated units. No waste, thickness, structural advice or curved-earth inference. Only the stated forward job is supported; display rounding does not change the c
Right circular closed frustum; perpendicular height and coaxial parallel bases. Both end disks included. Flat Euclidean geometry in the stated units. No waste, thickness, structural advice or curved-earth inference. Only the stated forward job is supported; display rounding does not change the calculation. Derivation: Unrolled lateral band plus both circular bases.
Accepted inputs: Radius a: 0.001 to 1,000 m; Radius b: 0.001 to 1,000 m; Height: 0.001 to 1,000 m.
How the calculation works
A = π(R+r)√((R−r)²+h²)+π(R²+r²)
Worked example
With radius a 2 m, radius b 2 m, height 2 m, area of a frustum of a cone is 50.26548246 m².
Assumptions and limits
Right circular closed frustum; perpendicular height and coaxial parallel bases. Both end disks included. Flat Euclidean geometry in the stated units. No waste, thickness, structural advice or curved-earth inference. Only the stated forward job is supported; display rounding does not change the calculation. Derivation: Unrolled lateral band plus both circular bases.