Surface area of 8 3D shapes with formula.. Surface Area Calculator is a free online tool from the ToolsRift Math Calculators collection. It runs entirely in your browser — nothing to install, no signup, and your data never leaves your device.
Choose a solid, enter its radius, height or side length, and the surface area appears instantly with the formula used.
The total area of all outer faces or curved surfaces of a 3D shape, measured in square units.
Surface area = 4 × π × r², where r is the radius of the sphere.
Yes — the total surface area includes both the curved lateral surface and the circular base(s).