Density is defined as mass per unit volume. ... Specific gravity is the ratio of a material's density with that of water at 4 °C (where it is most dense and is taken to have the value 999.974 kg m^-3). It is therefore a relative quantity with no units.

How do you convert density to specific gravity?

Converting a specific gravity into a density is as simple as multiply the SG by the reference density for which it was based. In most cases, this is the density of water, and therefore your multiply the SG by 1 to yield your density in g/cm^3.

Does specific gravity mean density?

Although the two terms often are used interchangeably, there is a technical difference between specific gravity and density. Density is defined as the mass per unit volume of a substance. ... When the specific gravity is defined based on water at 4°C, then the specific gravity is equal to the density of the liquid.