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 square pyramid — with worked examples in metric and imperial units.
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- 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
- Area Calculator — Pick a 2D shape — circle, square, rectangle, triangle, trapezium, parallelogram, ellipse, regular polygon, rhombus, sector, annulus or kite
- Sphere Surface Area Calculator — Enter the radius of the sphere and pick your output unit (m², ft², in², cm² and more). The calculator returns the full surface area along wi
- Cube Surface Area Calculator — Enter the cube's edge length and choose any output unit. The calculator returns 6a², the total area of all six faces.
- Cone Surface Area Calculator — Enter the base radius and height. The calculator splits the answer into the base (πr²) and the lateral surface (πr·s), where s = √(r²+h²) is
- Cylindrical Tank Surface Area Calculator — Enter the base radius and height. The calculator returns SA = 2πr² + 2πrh and shows the ends and side separately.