Cubic feet
Cubic feet are imperial units of volume. A cubic foot is defined as the volume of a cube with sides one foot in length. It is normally found in the United States for measuring the volume of household items, inner spaces or parcels.
Cubic Millimeters
A cubic millimeter is the volume of a cube 1 millimeter on each side, so 1,000 of them make a cubic centimeter. It is the same as a microliter, and a drop of water is roughly 50 cubic millimeters.