CALCULATOR
Closed Hemisphere Total Surface Area Calculator
Find hemisphere curved surface plus flat base. Example: Radius: 2 m gives 37.6991118431 m². Total surface area including the flat circular base. Includes flat circular base; curved area alone is 2πr². Flat Euclidean geometry; enter stated meter measurements. No material thickness, waste, structural recommendation or curved earth. Display rounding does not change calculation.
Total surface area including the flat circular base. Includes flat circular base; curved area alone is 2πr². Flat Euclidean geometry; enter stated meter measurements. No material thickness, waste, structural recommendation or curved earth. Display rounding does not change calculation. Derivation: Half sphere surface 2πr² plus disk πr².
Accepted inputs: Radius: 0.001 to 1,000 m.
How the calculation works
A_closed = 3πr²
Worked example
With radius 2 m, hemisphere curved surface plus flat base is 37.69911184 m².
Assumptions and limits
Total surface area including the flat circular base. Includes flat circular base; curved area alone is 2πr². Flat Euclidean geometry; enter stated meter measurements. No material thickness, waste, structural recommendation or curved earth. Display rounding does not change calculation. Derivation: Half sphere surface 2πr² plus disk πr².