Cubic Feet Calculator

Enter length, width, and height above - each in its own unit - and the calculator converts everything to feet, multiplies, and reports the volume in cubic feet plus cubic yards, cubic meters, cubic inches, liters, and US gallons. The quantity field multiplies the result for identical items.

Formula

$V=L\times W\times H$

All three dimensions are converted to feet before multiplying. A chest 4 ft long, 3 ft wide, and 30 in tall (30 / 12 = 2.5 ft):

$4\times 3\times 2.5=30\text{ cu ft}$

One cubic foot equals:

The formula covers box shapes only - split an L-shaped space into boxes and add the results.

Related calculators

• Concrete calculator - the same volume math plus bag counts and waste.
• Tile calculator - area coverage instead of volume.

Sources and further reading

• Wikipedia: Cubic foot - definition and the exact conversion factors used here.
• NIST Special Publication 811 - the reference for US customary and metric conversions (1 ft = 0.3048 m exactly).