Efficiency (η)
Calculate Efficiency (η) instantly with the exact formula and a worked example.
Efficiency (η)
Useful work (energy)J
Input work (energy)J
Efficiency
80%
Energy losses
20J
More about: Efficiency (η)
What it calculates
The “Efficiency (η)” calculator computes Efficiency in % from 2 parameters: useful work (energy) (J), input work (energy) (J).
A standard physics formula used in educational and engineering tasks.
Example calculation
With parameters Useful work (energy) = 80 J, Input work (energy) = 100 J the result is 80 %.
How to use
- Enter useful work (energy) and input work (energy) — each field above is adjustable with a slider.
- Efficiency (%) is calculated automatically as you type.
- Check the worked example below to see the formula applied to real numbers.
- Copy the result or bookmark this calculator.
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FAQ
How is Efficiency (η) calculated?
The Efficiency (η) calculator computes Efficiency (in %) from useful work (energy), input work (energy). Enter your values above and the exact formula is applied instantly; a worked example with real numbers is shown below.
Is the Efficiency (η) calculator free?
Yes. It is completely free, needs no signup, runs entirely in your browser, and sends no data to any server.
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