How to Calculate Cu Ft?

Calculating cubic feet is actually quite easy. Cubic feet are simply the area taken up by the flat surface of a shape and is measured in feet. Get the measurement of the length and width of the space, in feet. Then just mulitiply the lenght times the width. For example, if I had a garden that was 6 feet long and 3 feet wide, the space taken up would be 18 cubic feet.