⛽Converters

L/100km to MPG Converter

Convert fuel economy from liters per 100 km to miles per gallon (MPG). Compare car efficiency between the European and US standards.

L/100 km

MPG (US)

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Turning European consumption into American economy

The European spec sheet says 8 L/100 km, the US review talks in MPG, and you want both cars on the same yardstick. Type the litres per 100 km figure and the miles per gallon result appears straight away: 8 L/100 km is 29.4 MPG. Drivers in Brazil and Japan start from km/L instead, which makes this the second step rather than the first.

The two units are reciprocals of each other, and that fools people. L/100 km measures consumption, where lower is better; MPG measures economy, where higher is better. The scale is not linear: going from 6 to 5 L/100 km is worth almost 8 MPG, while going from 13 to 12 L/100 km is worth only 1.5 MPG. Replacing a thirsty car with an average one saves more fuel than replacing an efficient one with a hybrid.

The output uses the US gallon of 3.785 L. If your source is British, imperial MPG runs about 20% higher for the very same car: those 8 L/100 km read 35.3 MPG in the UK. Coming from km/L, convert first by dividing 100 by the dashboard figure, so 12 km/L is 8.33 L/100 km. The page does a single division inside your browser, with no external lookup involved.

Frequently asked questions

Are US MPG and UK MPG the same number?

No. The imperial gallon holds 4.546 L against 3.785 L for the US one, so the same car scores roughly 20% higher in British figures. This page uses the US gallon.

How do I go from km/L straight to MPG?

Multiply km/L by 2.352. A car doing 12 km/L is close to 28.2 US MPG. To use this page instead, divide 100 by the km/L figure first to get L/100 km.

Why does my car never match the official figure?

Official numbers come from standardised lab cycles. Traffic, air conditioning, underinflated tyres and a heavy right foot all shift the real result, so use spec sheets to compare cars, not as a promise.

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