Cubic Feet Calculator

Enter length, width, and height to get the volume in cubic feet, plus cubic metres, gallons, and litres. Works in feet, inches, centimetres, or metres.

Volume

24 ft³

Cubic metres—

US gallons—

Litres—

Volume in different units

The same box expressed in cubic feet, cubic metres, and hundreds of litres.

How it works

Cubic feet is the volume of a box: length times width times height, all in feet. Measure in another unit and the calculator converts each dimension to feet before multiplying.

volume = length × width × height
1 ft³ = 7.48052 US gal = 28.3168 L · 27 ft³ = 1 yd³

Worked example

A 4 ft × 3 ft × 2 ft box is 4 × 3 × 2 = 24 ft³, which is about 180 US gallons.

Frequently asked questions

How do I calculate cubic feet?

Length × width × height in feet; divide by 1,728 if you measured in inches.

How many cubic feet are in a cubic yard?

27 cubic feet.