◩ CONVERTERS Updated July 25, 2026

Fuel Economy Converter

MPG, km/L and L/100km side by side.

Value
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How it works

Efficiency units convert through kilometers per liter. L/100km is inverse, so it is handled separately from the distance-per-volume units.

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Frequently asked questions

Why is L/100km inverted?

It measures fuel used per fixed distance, so lower is better, the opposite of MPG.

Is a UK gallon different?

Yes, an imperial gallon is about 20 percent larger than a US gallon, so UK MPG figures look higher.

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