Cube Calculator
Calculate a cube’s volume, total surface area, face diagonal and space diagonal from a positive edge length. Results use cm, cm² and cm³.
Formula
V = a³; A = 6a²; face diagonal = a√2; space diagonal = a√3, with a in cm.
Edge length: 2 cm · Volume ≈ 1000000×(2 cm × 0.01 m/cm)^3 · Total surface area ≈ 60000×(2 cm × 0.01 m/cm)^2 · Face diagonal ≈ 100×(2 cm × 0.01 m/cm)×sqrt(2) · Space diagonal ≈ 100×(2 cm × 0.01 m/cm)×sqrt(3)
How to use
- Enter the length of one edge.
- Choose its length unit.
- Read volume, area and both diagonals.
Examples
- An edge of 2 cm gives volume 8 cm³ and total area 24 cm².
Frequently asked questions
Are all edges equal?
Yes. This calculator assumes a cube with six square faces and equal edges.
Which diagonal crosses the solid?
The space diagonal joins opposite vertices through the interior; a face diagonal stays on one face.
Does area include every face?
Yes. It includes all six faces of a closed cube.
Sources
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