UnitConFuel Consumption
Fuel consumption can be expressed as distance per unit of fuel, such as miles per gallon or kilometers per liter, or as fuel used per distance, such as liters per 100 kilometers. These are inverse formats, so the comparison is not a simple linear conversion in every case. The page also distinguishes between US and UK gallons, which makes US MPG and imperial MPG different. This converter is useful for cars, fleet comparisons, travel planning, and international vehicle specs.
Common conversions
| From | To |
|---|---|
| 30 Miles per Gallon (US) | 7.840486 Liter per 100 km |
| 40 Miles per Gallon (UK) | 7.062023 Liter per 100 km |
| 8 Liter per 100 km | 29.40182 Miles per Gallon (US) |
| 10 Liter per 100 km | 10 Kilometer per Liter |
| 50 Miles per Gallon (US) | 21.25719 Kilometer per Liter |
| 25 Miles per Gallon (US) | 30.02375 Miles per Gallon (UK) |
| 5 Liter per 100 km | 47.04292 Miles per Gallon (US) |
| 15 Kilometer per Liter | 35.28219 Miles per Gallon (US) |
Frequently asked questions
MPG to L/100km uses an inverse relationship, so higher MPG becomes lower L/100km. The converter handles that automatically for both US and UK gallon definitions.
The UK gallon is larger than the US gallon, so the same vehicle will show a higher number in UK mpg than in US mpg. Always confirm which gallon standard is being used.
Lower is better because it means the vehicle uses less fuel to travel 100 kilometers. This is the opposite of MPG, where higher is better.
Multiply by the appropriate factor depending on whether you want US or UK mpg. The page makes that distinction explicit to avoid incorrect comparisons.
It depends on the vehicle type, but lower values generally mean better efficiency. Small efficient cars may be well under 6 L/100km, while larger trucks and SUVs are usually higher.