Ecology & populations · SL/HL
Energy Transfer Efficiency Calculator
Enter the energy available before and after the transfer in the same unit.
Your values
Start with the example or enter your own values. Use a dot for decimals and e for scientific notation.
Calculated locally. No account or input upload.
Result & working
ExampleThe calculator is loading. The worked example is also shown below.
Step-by-step working
The formula
efficiency = output/input × 100%
| Symbol | Meaning |
|---|---|
| input | Energy available before transfer. |
| output | Energy retained or transferred to the next stage. |
When to use this calculator
State clearly what system boundary and time interval the energy values represent.
Worked example
The page opens with these example values. The result below is pre-generated for reference.
- efficiency = output/input × 100 = 1200/10000 × 100 = 12%
12%
Common mistakes
- Input and output must use the same energy unit and basis.