Calculating your fuel consumed is straightforward once you know the Generator Fuel Consumption formula and what each input means. This guide explains the method in plain language, walks through a manual calculation, and gives worked examples you can follow — then you can do it instantly with the Generator Fuel Consumption Calculator.
What is Generator Fuel Consumption?
The Generator Fuel Consumption calculation tells you your fuel consumed from a few simple inputs. The figure you are solving for here is the fuel consumed.
The Generator Fuel Consumption formula
The core formula is:
Fuel consumed = Load × Fuel use per kWh × Run timeHere is what each input means:
- Load — a value measured in kW. Example: 5 kW.
- Fuel use per kWh — a value measured in L/kWh. Example: 0.3 L/kWh.
- Run time — a value measured in hours. Example: 10 hours.
How to calculate it step by step
- Write down the load (for example, 5 kW).
- Write down the fuel use per kwh (for example, 0.3 L/kWh).
- Write down the run time (for example, 10 hours).
- Apply the formula above to get your fuel consumed.
- Double-check the result with the Generator Fuel Consumption Calculator.
Worked examples
Example 1
| Input / Output | Value |
|---|---|
| Load | 5 kW |
| Fuel use per kWh | 0.3 L/kWh |
| Run time | 10 hours |
| Fuel consumed | 15.00 |
| Fuel per hour | 1.50 |
With load of 5 kW, fuel use per kwh of 0.3 L/kWh and run time of 10 hours, the fuel consumed works out to 15.00.
Example 2
With load of 10 kW, fuel use per kwh of 0.3 L/kWh and run time of 10 hours, the fuel consumed works out to 30.00.
| Result | Value |
|---|---|
| Fuel consumed | 30.00 |
| Fuel per hour | 3.00 |
Example 3
With load of 2.5 kW, fuel use per kwh of 0.3 L/kWh and run time of 10 hours, the fuel consumed works out to 7.50.
| Result | Value |
|---|---|
| Fuel consumed | 7.50 |
| Fuel per hour | 0.75 |
Tips for an accurate result
- Keep your units consistent — mixing, say, months with years or grams with kilograms is the most common source of error.
- Round only at the very end. Rounding inputs early can shift the final answer noticeably.
- Re-run the numbers whenever an input changes, rather than estimating from an old result.
Prefer not to do the maths by hand? — the Generator Fuel Consumption Calculator does it instantly, for free, with the formula and a worked example built in.
Related calculators
Continue exploring energy calculators with these tools: Solar Panel Calculator, Solar Savings Calculator, Solar Payback Period Calculator, Generator Size Calculator, Inverter Size Calculator.