Overview
What Is a Fuel Economy Converter?
This tool converts fuel efficiency measurements between miles per gallon (MPG), liters per 100km, and kilometers per liter.
Convert between MPG, L/100km, and km/L instantly.
This tool converts fuel efficiency measurements between miles per gallon (MPG), liters per 100km, and kilometers per liter.
Useful when comparing vehicle fuel efficiency specs from different countries using different measurement conventions.
Input the fuel economy figure to convert.
Choose the unit you're converting from and to.
The converted value updates automatically.
Because L/100km measures fuel USED per distance (lower is better), while MPG measures distance PER fuel unit (higher is better) - opposite conventions.
L/100km = 235.215 ÷ MPG (using US gallons).
Most of Europe, Canada, and many other countries use this metric for fuel efficiency.
Kilometers per liter - similar concept to MPG but in metric units, common in some Asian markets.
Yes, this is a common practical use when comparing specs listed in different regional formats.
Results use standard conversion factors accurate to several decimal places.
No, calculations happen entirely in your browser.
This calculator uses US gallons, the more common reference for MPG in most contexts.
For that specific calculation, use our fuel cost calculator instead.
Yes, completely free with no sign-up required.