This is used in measuring solid bodies or things which have length, breadth and thickness, such as stone masonry, the capacity of bins, boxes, rooms, etc. A cube is a solid body bounded by six equal sides. It is often called a hexahedron. Hence, a cubic inch is a cube each of the sides of which is a square inch. A cubic foot is a cube with each of its sides a square foot, as shown in Fig. 4.

Cubic measure is so called because its measuring unit is a cube. The standard of cubic measure is derived from the standard linear measure. A unit of cubic measure therefore is a cube whose sides are respectively equal in length to the linear unit of the same name.