Generator Fuel Consumption Calculator
Estimate how many litres per hour your generator will consume at different load levels.
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Result
Enter values above and click Calculate to see your result.
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Formula
Adjusts the maximum fuel rate of the generator according to the actual electrical load or demand.
Worked Example
Generator Fuel Efficiency
- An oversized generator running at low load is highly inefficient.
- Modern electronic governors manage fuel better than older mechanical ones.
- Engine wear also impacts fuel consumption over time.
Always keep a fuel reserve for unexpected long-term outages.
You can also calculate changes using our Generator Running Cost Calculator or Diesel Consumption Calculator.
Frequently Asked Questions
Is the consumption linear?
Mostly, but engines are often slightly more efficient at 70-80% load than at 10% load.
What is a "load"?
The total wattage of all devices connected to the generator.
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