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Solid geometry calculator

Unit and format converters: radix, length/area/mass/volume/density/pressure/time, temperature, bytes (binary/decimal), English number words, coordinates, and box geometry. Everything runs locally in your browser with swap, copy, and quick reference tables.

Solid geometry calculator: box/cube/cylinder/cone/sphere/frustum/spherical cap/ellipsoid/torus/regular prism with diagrams and formulas.

Solid type

Rectangular prism

Length × width × height

V = lwh; S = 2(lw + lh + wh). Diagonals use Pythagoras.

Volume: 60

Surface area: 94

Space diagonal: 7.071068

Base diagonal: 5

Length–height diagonal: 5.830952

Width–height diagonal: 6.403124