Efficiency Calculator

Calculate the efficiency of a system. Enter the total energy input in to a system, and the total energy or work output to determine it’s efficiency.


Efficiency is the avoidance of waste in any system, often displayed as a percentage of work output to energy input. This energy is usually measure in Joules (J). Efficiency is very often used in applications of heat transfer, since heat loss is a core issue in modern day engineering. It’s also used to evaluate mechanical, solar, and chemical efficiencies.

The formula for efficiency is normal displayed as:

N (efficiency) = Work Output / Energy Input

Where work and energy are measure in Joules.

Multiply the result of the above equation by 100 to get the efficiency as a percentage.

The above explanation is for the use of efficiency in physics and thermodynamics, but efficiency can be used in anything from finance to work performance.

If you’re interested in learning more about science and math, visit our calculators here.


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