4 tools
Liters per 100 kilometers and US or Imperial miles per gallon.
Choose a conversion below. Every tool includes an instant result, an example and a short explanation.
Fuel-consumption figures use opposing directions. Liters per 100 kilometers measures fuel used to travel a fixed distance, so lower is better. Miles per gallon measures distance traveled on a fixed amount of fuel, so higher is better. The two measures are reciprocals rather than simple multiples.
A US gallon is 3.785411784 liters, while an Imperial gallon is 4.54609 liters. That difference makes US mpg and Imperial mpg numerically different for the same vehicle. Both formulas require a value above zero; zero consumption would correspond to unbounded mpg. Real results depend on driving cycle, terrain, weather and vehicle condition, not only the unit.
L/100 km measures fuel consumed to cover a fixed distance, so less is better. Miles per gallon measures distance gained from a fixed fuel volume, so more is better. Their relationship is reciprocal, not a constant multiplication. A zero input cannot be converted using the reciprocal formula.
No. US mpg uses the US liquid gallon; imperial mpg uses the larger imperial gallon. The same vehicle and journey therefore produce different mpg numbers under the two definitions. Choose the gallon system given by the source before comparing ratings, and keep driving conditions separate from a pure unit conversion.