Fuel Economy Converter

About this calculator

Comparing a US car's MPG rating to a European car's L/100km fuel economy figure isn't a simple unit conversion, since MPG measures distance traveled per unit of fuel while L/100km measures fuel consumed per unit of distance, meaning higher MPG is better but lower L/100km is better, an inverse relationship that trips people up. This calculator handles the reciprocal math directly, converting via L/100km = 235.214583 ÷ MPG(US) and km/L = 100 ÷ L/100km, so you can compare a car's advertised efficiency across regions or convert a spec sheet figure into whatever unit you actually think in. It's especially useful when researching an imported vehicle, comparing fuel costs for a trip abroad, or just making sense of a European car review that only lists L/100km when you're used to thinking in miles per gallon.

Frequently asked questions