In order to calculate cubic feet, you need to find the length, width and height of the desired object. You then multiply these three dimensions in order to get the resultant value of volume, which is written in cubic feet.
The cubic foot is a standard measurement of volume in the United States, Canada and the United Kingdom. The volume of an object can be used to determine how much that object can hold in terms of capacity. Refrigerator and car trunk space are both described in how many cubic feet they can hold. For instance, a 4 feet long, 2 feet wide, 1 foot high car trunk has 8 cubic feet of space (4 x 2 x 1 = 8).