Specific Gravity Calculator

Formula

The formula to calculate Specific Gravity (SG) is:

\[ SG = \frac{\rho}{\rho_W} \]

Where:

\(SG\) is the Specific Gravity (unitless)
\(\rho\) is the density of the substance (kg/m³)
\(\rho_W\) is the density of water (kg/m³)

What is Specific Gravity?

Specific Gravity is a ratio of the density of a substance to the density of water. The temperature and pressure of the water and substance need to be the same for accurate calculation. This metric helps in understanding the density of a substance in a comprehensible way, using water as a standard reference.

Example Calculation

Let's assume the following values:

Density of Substance (ρ) = 800 kg/m³
Density of Water (ρW) = 1000 kg/m³

Using the formula to calculate the Specific Gravity (SG):

\[ SG = \frac{\rho}{\rho_W} = \frac{800}{1000} = 0.80 \]

The Specific Gravity (SG) is 0.80.