Fuel Efficiency Converter
Convert fuel economy between L/100km, km/L, MPG (US) and MPG (UK). Useful when comparing cars across regions with different units.
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Result
Compare two cars — annual fuel cost
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Car A / year
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Car B / year
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Difference
Plan a trip cost in the fuel cost calculator.
Convert fuel economy
Convert units instantly and compare annual fuel spend between two vehicles. Copy or download the comparison as CSV.
FAQ
Which units are supported?
L/100km, km/L, MPG (US) and MPG (UK/Imperial). Note that US and UK gallons differ, so their MPG values differ too.
Why is the result inverse?
L/100km measures consumption (lower is better) while MPG and km/L measure distance per fuel (higher is better), so converting flips the relationship.
Can I compare two cars?
Yes — enter both cars' economy and annual km to see yearly fuel cost difference.
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