Cubic Feet Calculator

Cubic feet is just length × width × height with all three measurements in feet. A box that is 2 ft × 3 ft × 4 ft has a volume of 24 cubic feet. The formula does not change for shipping crates, fridges, storage units, or moving boxes; the only thing that changes is which units your dimensions started in.

If you measure in inches, divide each dimension by 12 before multiplying (or multiply your final answer by 1/1728, since 12³ = 1728). If you measure in centimetres, divide each by 30.48. The calculator handles all of this automatically, but the conversion factors are worth knowing if you ever do it on the back of an envelope.

Three common scenarios. First, shipping: international freight quotes use cubic feet (or cubic metres) to work out volumetric weight, which is often more than the actual weight for bulky-but-light items. Second, moving home: removal companies estimate van size in cubic feet, and a typical UK three-bedroom house clears around 1,000 cubic feet. Third, storage units: a 10×10 ft unit with an 8 ft ceiling is 800 cubic feet, and most facilities quote sizes in floor area only, leaving you to multiply by ceiling height yourself.

Refrigerator and freezer capacity is also given in cubic feet (or litres), which is useful if you are comparing a US-spec fridge to a UK one. Multiply cubic feet by 28.3168 to get litres. A 20 cubic foot American fridge is roughly 566 litres, considerably bigger than the typical 300-litre UK fridge.