Specific gravity of milk fat is

Specific gravity of milk fat is 0.93.
Specific gravity is the ratio of the density (mass of a unit volume) of a substance to the density of a given reference material.
Specific gravity for liquids is nearly always measured concerning water at its densest, for gases, the reference is air at room temperature.
The specific gravity of some major milk constituents is: water: 1.00; fat: 0.93, protein: 1.346, lactose: 1.666, salts: 4.23 and SNF: 1.616.