Density refers to the mass of an explosive per unit of volume, usually expressed in grams per cubic centimeter or pounds per cubic foot.

Density is an important characteristic of an explosive. Raising the density (i.e. by pressing or casting) improves brisance and detonating velocity.

The density of a substance is its mass per unit volume. Because many substances, especially gases, can be compressed into a smaller volume by increasing the pressure on them, the temperature and pressure at which the density is measured are usually specified.