Surface Area Calculator

• Free online surface area calculator. Computes the surface area of 14 common solids — cube, cuboid, sphere, cylinder, cone, frustum, spherical cap, spherical segment, regular tetrahedron, regular hexahedron, regular prism, regular pyramid, torus, and ellipsoid — and converts between 8 area units (m², cm², ft², and more).
• After calculating, it shows the formula used and a step-by-step breakdown. Handy helpers include an Example button to auto-fill values, plus Reset All and Clear.

1. Open the tool page — no download, installation, or sign-up required.
2. Pick a shape from "Select Shape," set the input and output units, and enter the relevant parameters (side length, radius, height, etc.).
3. Click "Calculate" to get the result. The result panel shows the formula, the calculation steps, and unit conversion; use "Copy Result" to copy it in one click.

• The tool is completely free and requires no registration.
• All calculations run locally in your browser — your data is never uploaded.

Free online surface area calculation tool, supports surface area calculation of 14 geometric solids: cube, cuboid, sphere, cylinder, cone, frustum, spherical cap, spherical segment, regular tetrahedron, regular hexahedron, regular prism, regular pyramid, torus, and ellipsoid, supports multiple unit conversions.

Open the tool page — no download, installation, or sign-up required. Pick a shape from "Select Shape," set the input and output units, and enter the relevant parameters (side length, radius, height, etc.). Click "Calculate" to get the result. The result panel shows the formula, the calculation steps, and unit conversion; use "Copy Result" to copy it in one click.

The tool is completely free and requires no registration. All calculations run locally in your browser — your data is never uploaded.

Yes, Surface Area Calculator is completely free. No download or installation required — it runs right in your browser.