Fuel Economy Converter

Select the units you want to convert between and enter a value.

Fuel Economy

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Worth Knowing

Fuel economy is where unit systems clash most awkwardly, because the two conventions are mathematical opposites: miles per gallon rewards higher numbers (more distance per fuel), while liters per 100 km rewards lower ones (less fuel per distance). You can't simply scale between them — the conversion is a reciprocal, which is why they can't be compared at a glance. Add the US-versus-imperial gallon gap and cross-border fuel-economy comparisons need genuine care rather than rough mental math.

How to Use

Choose the unit you're converting from and the unit you want, from the two dropdowns above.
Type a value into the input field — the converted result updates instantly.
Swap the two units any time to flip the direction of the conversion.

Frequently Asked Questions