Enter the total energy output (J) and the total energy input (J) into the Return on Energy Invested Calculator. The calculator will evaluate and display the Return on Energy Invested.
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Return on Energy Invested Formula
The following formula is used to calculate the Return on Energy Invested.
EROI = EO / EI * 100
- Where EROI is the Return on Energy Invested (%)
- EO is the total energy output (J)
- EI is the total energy input (J)
How to Calculate Return on Energy Invested?
The following example problems outline how to calculate Return on Energy Invested.
Example Problem #1:
- First, determine the total energy output (J).
- The total energy output (J) is given as: 175.
- Next, determine the total energy input (J).
- The total energy input (J) is provided as: 350.
- Finally, calculate the Return on Energy Invested using the equation above:
EROI = EO / EI * 100
The values given above are inserted into the equation below and the solution is calculated:
EROI = 175 / 350 * 100 = 50 (%)
Example Problem #2:
For this problem, the variables needed are provided below:
total energy output (J) = 600
total energy input (J) = 800
This example problem is a test of your knowledge on the subject. Use the calculator above to check your answer.
EROI = EO / EI * 100 = ?
