Litres to gallons converter
We measure economy by miles to the gallon, but we measure in litres at the fuel pump - here you can convert between the two so you can more accurately judge your car's fuel economy.
Which? car tests discover a car’s true mpg by simulating a rolling road in a lab, which means every car can be tested in the exact same way, and in the exact same environment.
The test roads imitate city, out-of-town and motorway driving - something that the official tests don't do - which allows you to see how the mpg could affect your pocket depending on the roads you typically drive on.
Our tests reveal that many car trip computers give inaccurate fuel-economy readings.