⛽ Fuel Economy Converter
L/100km6.67
mpg (US)35.28
mpg (UK)42.37
Enter fuel economy in km/L (kilometers per liter, common in Japan and elsewhere) to convert it to L/100km (used in Europe), US mpg, and UK mpg. Handy for comparing fuel economy figures across regions.
How to use
- Enter the fuel economy in km/L (kilometers traveled per liter of fuel).
- The equivalent values in L/100km, US mpg, and UK mpg are calculated automatically.
FAQ
How does L/100km relate to km/L?
L/100km measures how much fuel is needed to travel 100km — it's the inverse of km/L (L/100km = 100 ÷ km/L). A lower number means better fuel economy.
Why are US mpg and UK mpg different for the same fuel economy?
The US gallon (about 3.785 liters) and the UK (imperial) gallon (about 4.546 liters) are defined differently, so the same fuel economy yields a higher UK mpg figure than US mpg.
What conversion factors does this use?
This uses the exact defined constants: 1 mile = 1.609344 km, 1 US gallon = 3.785411784 L, and 1 UK (imperial) gallon = 4.54609 L.