Volume of a cube calculator
Enter the dimensions of a cube and read off its volume and surface area. Volumes convert to litres and gallons with the unit selector.
Volume
8m³
- Surface area
- 24
- Space diagonal
- 3.464 101 6
- Face diagonal
- 2.828 427 1
Show the working
- Side = 2
- Volume = 2^3 = 8
- Surface area = 6 * 2^2 = 24
- Space diagonal = 2 * sqrt(3) = 3.4641
- Face diagonal = 2 * sqrt(2) = 2.828 43
Values are shown to six significant figures here; the arithmetic itself runs on exact fractions and is only rounded where a number is printed.
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The formula
- volume = s^3
- surface area = 6 s^2
- space diagonal = s sqrt 3
Switch the volume unit to litres or US gallons to read the capacity directly.
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