Fuel Economy Converter (mpg, km/L, L/100km)
Enter a fuel economy figure and pick units — the conversion updates instantly.
Your text and files never leave your browser — nothing is sent to a server.
Show all units
- Kilometers per liter (km/L)-
- Liters per 100 km (L/100km)-
- Miles per gallon (US) (mpg (US))-
- Miles per gallon (UK) (mpg (UK))-
- Miles per liter (mi/L)-
How to use
- Type a figure in “Value” and choose the units to convert from and to. The page opens on US mpg → km/L.
- Higher km/L and mpg mean better economy, while lower L/100km is better. They are inverses, so the conversion is not a fixed multiplier.
- “Show all units” lists the same figure in every unit at once. Zero cannot be expressed in L/100km, so it shows a dash.
- The page address keeps your value and units, so you can share the link as is.
FAQ
How do I convert mpg to L/100km?
Divide 235.215 by US mpg, or 282.481 by UK mpg. So 30 US mpg is about 7.84 L/100km.
Why do US and UK mpg differ for the same car?
A US gallon is about 3.785 L and a UK gallon about 4.546 L, so UK mpg figures come out roughly 20% higher.
Why does L/100km not scale like the other units?
L/100km measures fuel used per distance, while mpg and km/L measure distance per unit of fuel. One is the inverse of the other, so the converter divides instead of multiplying.
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