Volume stress divided by volume strain equal to:

Explanation

Bulk modulus is the ratio or hydrostatic stress to the volumetric strain. Within the elastic range is called bulk modulus. It is denoted by K or B. Sometimes referred to as the incompressibility, the bulk modulus is a measure of the ability of a substance to withstand changes in volume when under compression on all sides. It is equal to the quotient of the applied pressure divided by the relative deformation.