As you well aware that all materials having individual properties and weights based on the density. How we can compare the different materials in a same platform.
Pure water was chosen as the 'base line' for specific gravity and given the value of 1. The specific gravity of all other materials are compared to water as a fraction heavier or lighter density.
For example, Copper has a specific gravity (sg) of 8.93 (8930 kg/cu.m)
One handy metric link between units to remember is that 1 Litre [1000cc] of pure water weighs 1 kilogram.Equally, 1 milliliter of pure water has a mass of 1 gram or 1mL = 1g.
As specific gravity is just a comparison, it can be applied across any units.
Specific gravity is the same number as density but without any units (adimensional).
DOCUMENTATION IS VERY IMPORTANT
5 days ago