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Fuel economy converter

Convert fuel consumption between mpg, L/100 km and km/L. To go from US mpg to L/100 km, divide 235.215 by the mpg value.

Result

7.84049L/100 km

L/100 km = 235.215 ÷ US mpg

Quick challenge

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Guess the conversion before you calculate it. How many can you get in a row?

How it works

mpg and km/L measure distance per fuel (higher is better), while L/100 km measures fuel per distance (lower is better). That is why the conversion is an inverse, not a multiplication. US and UK mpg differ because their gallons differ.

All units compared

All units compared
UnitSymbolFormula
kilometer per literkm/L—
liter per 100 kmL/100 kmL/100 km = 100 ÷ km/L
mile per US gallonUS mpgUS mpg = km/L ÷ 0.425144
mile per UK gallonUK mpgUK mpg = km/L × 2.82481

Frequently asked questions

Why is the mpg to L/100 km conversion not a simple factor?

Because one measures distance per volume and the other volume per distance. Doubling mpg halves L/100 km.

Is 30 mpg good fuel economy?

30 US mpg is about 7.8 L/100 km, typical of a modern mid-size petrol car.

What is 1 US mpg in liters per 100 km?

1 US mpg = 235.215 L/100 km, using L/100 km = 235.215 ÷ US mpg.

What is 1 L/100 km in miles per US gallon?

1 L/100 km = 235.215 US mpg, using US mpg = 235.215 ÷ L/100 km.

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