CALCULATOR
Right Circular Cone Lateral Area Calculator
Find curved surface excluding base. Example: Radius: 2 m, Perpendicular height: 2 m gives 17.7715317526 m². Right circular cone; height is perpendicular to its circular base. Right circular cone; circular base excluded. Flat Euclidean geometry; enter stated meter measurements. No material thickness, waste, structural recommendation or curved earth. Display rounding does not change calculation.
Right circular cone; height is perpendicular to its circular base. Right circular cone; circular base excluded. Flat Euclidean geometry; enter stated meter measurements. No material thickness, waste, structural recommendation or curved earth. Display rounding does not change calculation. Derivation: Unrolled cone sector has lateral area πrℓ.
Accepted inputs: Radius: 0.001 to 1,000 m; Perpendicular height: 0.001 to 1,000 m.
How the calculation works
A_lateral = πr√(r²+h²)
Worked example
With radius 2 m, perpendicular height 2 m, curved surface excluding base is 17.77153175 m².
Assumptions and limits
Right circular cone; height is perpendicular to its circular base. Right circular cone; circular base excluded. Flat Euclidean geometry; enter stated meter measurements. No material thickness, waste, structural recommendation or curved earth. Display rounding does not change calculation. Derivation: Unrolled cone sector has lateral area πrℓ.