Surface Area Calculator
Pick a shape, enter the dimensions in your preferred units (mm, cm, m, in, ft, yd, etc.), and instantly see the surface area in m², ft², in², cm² or any…
What this calculator does
Computes the total surface area of 10 common 3D shapes from your input dimensions, with full unit support on every input and on the result. Shows the formula used and a labelled breakdown (e.g. base + lateral) wherever it makes sense.
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Related calculators
- Annulus Area Calculator — Enter the outer and inner radii. The calculator returns A = π·(R² − r²).
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- Capsule Surface Area Calculator — Enter the radius and the straight middle length. The calculator returns 4πr² for the two rounded ends plus 2πrh for the cylindrical side.
- Circle Area Calculator — Enter the radius. The calculator returns A = πr², the area of the flat disc.
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Related guides
- Surface Area Formulas for Common 3D Shapes — A clear, plain-English guide to surface area formulas for sphere, cube, cone, cylinder, rectangular tank, capsule, spherical cap, conical frustum, ellipsoid and