Volume of a rectangular box calculator
Enter the dimensions of a rectangular box and read off its volume and surface area. Volumes convert to litres and gallons with the unit selector.
Volume
9m³
- Surface area
- 27
- Space diagonal
- 3.905 124 8
Show the working
- Length = 3
- Width = 2
- Height = 1.5
- Volume = 3 * 2 * 1.5 = 9
- Surface area = 2 * (3*2 + 3*1.5 + 2*1.5) = 27
- Space diagonal = hypot(3, 2, 1.5) = 3.905 12
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 = l w h
- surface area = 2(lw + lh + wh)
Switch the volume unit to litres or US gallons to read the capacity directly.
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