Cube Volume Calculator
A cube needs only one measurement: its side. Enter it here to get the volume, total surface area and both diagonals instantly. Every calculation runs in your browser, so students and builders can check answers on the spot.
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How to use
- Enter the cube's side length in any unit — all sides of a cube are equal.
- Volume, total surface area and both diagonals will show instantly.
- Change the side to compare sizes — the volume updates with every keystroke.
- Use the results for homework checks, packaging estimates or material planning.
Tips
- Volume grows with the cube of the side: doubling the side makes eight times the volume.
- For a hollow box, subtract the inner cube from the outer cube to get the material volume.
- Keep the unit consistent; the result is in cubic units of whatever you entered.
- Surface area matters for painting or wrapping; volume matters for filling.
Note: Units: volume in cubic units, area in square units and diagonal in linear units.