Enter the density of the substance (kg/m^3) and the density of the reference (kg/m^3) into the Relative Density Calculator. The calculator will evaluate and display the Relative Density. 

Relative Density Formula

The following formula is used to calculate the Relative Density. 

RD = ds / dr

  • Where RD is the Relative Density ((none))
  • ds is the density of the substance (kg/m^3) 
  • dr is the density of the reference (kg/m^3) 

How to Calculate Relative Density?

The following example problems outline how to calculate Relative Density.

Example Problem #1:

  1. First, determine the density of the substance (kg/m^3). 
    1. The density of the substance (kg/m^3) is given as: 80.
  2. Next, determine the density of the reference (kg/m^3). 
    1. The density of the reference (kg/m^3) is provided as: 20.
  3. Finally, calculate the Relative Density using the equation above: 

RD = ds / dr

The values given above are inserted into the equation below:

RD = 80 / 20 = 4 ((none))


Example Problem #2: 

For this problem, the variables needed are provided below:

density of the substance (kg/m^3) = 30

density of the reference (kg/m^3) = 100

This example problem is a test of your knowledge on the subject. Use the calculator above to check your answer. 

RD = ds / dr = ?