Fuel Economy Converter
Convert any fuel economy figure into the other three units. Canada rates vehicles in litres per 100 km, while US listings use MPG and older Canadian sources use imperial MPG, and the two gallons are not the same size.
Your results
Worked example
A US listing rates a vehicle at 30 MPG (US):
- Litres per 100 km: 235.215 ÷ 30 = 7.84 L/100 km
- Kilometres per litre: 100 ÷ 7.84 = 12.75 km/L
- Imperial MPG: 282.481 ÷ 7.84 = 36.03 MPG, higher only because the imperial gallon is bigger
How this converter works
The constants come from the exact gallon sizes: 3.785 L for a US gallon and 4.546 L for an imperial gallon, with 1 mile equal to 1.609 km. Note that litres per 100 km runs backwards compared with MPG: a lower number is better.
Common questions
Why does the same car show a better MPG in imperial?
Nothing about the car changes. The imperial gallon is about 20 percent larger than the US gallon, so the car travels about 20 percent farther on each imperial gallon. Always check which gallon a listing means before comparing.
What is a good L/100 km figure?
As a rough guide, under 7 L/100 km is efficient for a gasoline car, 7 to 10 is typical for crossovers and SUVs, and trucks often run 12 or more. Official Canadian ratings come from Natural Resources Canada and are measured on a test cycle, so real-world winter figures are usually worse.
Estimates only. Conversions are exact, but the fuel economy figure you start from is a rating, not a promise; real consumption varies with temperature, speed, load, and driving style. Mississippi Maple accepts no liability for decisions made using this converter.