Enter the total energy (J) and the total mass (kg) into the Calculator. The calculator will evaluate the Energy Per Unit Mass. 

Energy Per Unit Mass Formula

EPM = E / M


  • EPM is the Energy Per Unit Mass (J/kg)
  • E is the total energy (J)
  • M is the total mass (kg)

To calculate Energy Per Unit Mass, divide the energy by the mass in kilograms.

How to Calculate Energy Per Unit Mass?

The following steps outline how to calculate the Energy Per Unit Mass.

  1. First, determine the total energy (J). 
  2. Next, determine the total mass (kg). 
  3. Next, gather the formula from above = EPM = E / M.
  4. Finally, calculate the Energy Per Unit Mass.
  5. After inserting the variables and calculating the result, check your answer with the calculator above.

Example Problem : 

Use the following variables as an example problem to test your knowledge.

total energy (J) = 700

total mass (kg) = 1000