Free Fuel Economy Converter
American cars brag in miles per gallon, European ones sip in liters per 100 km — and the two scales run in opposite directions. This free fuel economy converter translates between MPG (US and UK), L/100km and km/L instantly, so you can compare any car on any continent.
Value in all fuel-economy units
| Unit | Value |
|---|
How to Use the Fuel Economy Converter
- Enter your fuel economy in the input box.
- Choose the units — L/100km, km/L, MPG (US) or MPG (UK) — and swap them with ⇄ if needed.
- See the result instantly, plus the value in every other fuel-economy unit below.
- Copy the result with one click to use it anywhere.
Features
Four fuel-economy units with the US/imperial gallon distinction handled explicitly. Live conversion, one-click swap, and a full table of equivalents.
Benefits & Use Cases
Car shoppers comparing imports, travelers renting abroad, and fleet managers standardizing reports all get apples-to-apples numbers. No more wondering whether 40 MPG is good (it is — about 5.9 L/100km).
Tips
Lower L/100km is better, but higher MPG is better — the inverse relationship trips everyone up. Rough guide: 30 MPG (US) ≈ 7.8 L/100km ≈ 12.8 km/L.
Frequently Asked Questions
How do I convert MPG to L/100km?
Divide 235.21 by the US MPG figure. For example, 30 MPG = 7.84 L/100km.
What is the difference between US and UK MPG?
The imperial gallon is ~20% larger, so the same car scores higher in UK MPG. 30 US MPG ≈ 36 UK MPG.
How do I convert L/100km to km/L?
Divide 100 by the L/100km figure. For example, 5 L/100km = 20 km/L.
Is higher or lower L/100km better?
Lower — it measures fuel consumed per distance. For MPG and km/L, higher is better.
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