4 March 2017

What is specific gravity

Specific gravity is defined as the ratio of the weight density of a fluid to the weight density of a standard fluid.

For liquid standard fluid is taken as water and for gas is air.

Specific gravity is also called relative density.

Specific gravity is a dimensionless quantity.

It denoted by S.

S ( for liquid ) = Weight density of liquid / Weight density of water

S ( for gases ) = Weight density of gas / Weight density of air