Question

what is the difference between specific gravity & density ?

Answer 1

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

Answer 2

Density is a measurement that compares the amount of matter an object has to its volume. OR density is mass per unit volume...whereas...specific gravity , also called relative density is defined as the ratio between the weight of a substance and the weight of an equal volume of water at 4 °C (39 °F).