Calculate your result
Enter your figures below. Values stay in your browser.
How to use L/100km Calculator
- Enter your figures in the units shown beside each field. Keep monetary inputs in the same currency; money results are currently displayed in USD.
- Select the unit standard where the form offers a choice, then choose Calculate.
- Read the breakdown and compare the worked example below. Change one assumption to see its effect.
Formula used
L/100km = litres used ÷ kilometres travelled × 100.
Worked example
500 km using 40 litres gives 40 ÷ 500 × 100 = 8 L/100km. The equivalent economy is 12.5 km/L.
What the result means
Lower L/100km means less fuel consumed. Use fuel actually used over the measured distance, not the tank capacity.
Check your result
Results retain calculation precision internally and round for display. Keep the input values with the result so you can reproduce it. Use Reset to restore the example inputs, or Copy result to copy the displayed answer.
If the result does not agree with your own calculation, report the page, inputs and expected answer. See our methodology and reference sources for the standards used.
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MPG Calculator
MPG Calculator works well as a second check: enter a measured trip and the correct gallon standard, then keep the original units beside the answer.
KM/L Calculator
KM/L Calculator works well as a second check: enter kilometres travelled and litres consumed, then keep the original units beside the answer.
Formula, worked example and limitations updated September 10, 2026.