Overview
the mathematical expression for Boyle’s law: for a constant mass of a gas at a constant temperature, its pressure is inversely proportional to its volume. In other words, under the conditions specified the product of the volume of a gas by its pressure is a constant, that:

Where:

• P₁ and V₁ are initial pressure and volume,

• P₂ and V₂ are final pressure and volume.

Significance
Fundamental to gas behavior in engines, air compressors, and diving physics.