Free Fuel Efficiency Converter
MPG, L/100km and km/L in one place.
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About the Fuel Efficiency Converter
Free fuel efficiency converter. Convert fuel economy between US MPG, UK (imperial) MPG, litres per 100 km and kilometres per litre — instantly, all at once. Runs in your browser.
How it works
- 1
Enter a value
And its unit.
- 2
See all units
MPG US/UK, L/100km, km/L.
- 3
Compare
Everything at a glance.
Frequently asked questions
A US gallon is smaller than an imperial (UK) gallon, so the same car shows a higher MPG figure in the UK. The tool converts each correctly.
Lower is better for L/100km (less fuel per distance). For MPG and km/L, higher is better.