How do MPG and L/100km relate?

To convert US MPG to L/100km: divide 235.21 by the MPG number. So 30 MPG is about 7.84 L/100km. UK MPG differs because the UK gallon is 20% larger - 30 UK MPG is about 9.41 L/100km.

Is higher MPG always better?

Yes - higher MPG means more miles per gallon, which is lower L/100km. The confusion is that L/100km: lower is better, while MPG: higher is better. This tool shows both so you do not mix them up.

How much fuel does a typical car use?

New compact cars: 5-7 L/100km (34-47 MPG). SUVs/trucks: 10-15 L/100km (16-24 MPG). Hybrid cars: 3-5 L/100km (47-78 MPG). Electric cars use kWh/100km instead.

⛽ Fuel Consumption Converter

Fuel economy speaks different languages on every continent. This converter handles MPG (US), MPG (UK), km per liter, and the European L/100km where LESS is BETTER — the inverse relationship trips up a lot of people.

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Last updated September 10, 2026 — all conversions use exact ISO 80000 unit definitions.