Enter the input and output energy in joules into the calculator to determine the heat efficiency of a system. The calculator will provide the efficiency as a percentage.

Heat Efficiency Formula

The following formula is used to calculate the heat efficiency of a system:

E = (OE / IE) * 100

Variables:

  • E is the efficiency (%)
  • OE is the output energy (joules)
  • IE is the input energy (joules)

To calculate the heat efficiency, divide the output energy by the input energy and then multiply by 100 to get the percentage.

What is Heat Efficiency?

Heat efficiency is a measure of how effectively a system converts input energy into useful output energy. It is an important metric in thermodynamics and engineering, as it helps determine the performance and sustainability of heating systems, engines, and other energy-consuming devices. A higher efficiency percentage indicates a more efficient system that wastes less energy.

How to Calculate Heat Efficiency?

The following steps outline how to calculate the heat efficiency:


  1. First, determine the input energy (IE) in joules.
  2. Next, determine the output energy (OE) in joules.
  3. Use the formula E = (OE / IE) * 100 to calculate the efficiency (E).
  4. Finally, calculate the heat efficiency (E) as a percentage.
  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.

Input Energy (IE) = 500 joules

Output Energy (OE) = 350 joules