MPG Converter

By Piotr Małek
MPG converter lets you recalculate fuel economy units between US and Imperial miles per gallon and liters per 100 kilometers.

This Miles Per Galon (MPG) converter enables you to quickly and easily swap between units used in fuel economy conversions. The three available units in this MPG converter are:

  • miles per US gallon
  • miles per UK gallon
  • liters per 100 kilometer

Keep in mind that these units are inversely proportional (that is, as one decreases, the other increases, and vice versa). An efficient car consumes a low amount of gasoline per 100 kilometers, but can travel many miles on a gallon. This MPG converter can serve as a useful tool when ordering a car from abroad. Make sure you also have it with you when you are traveling in a country with different fuel economy units as the differences between them are quite significant. Our gas calculator is closely related to these issues, as it lets you calculate the total cost of a car trip based on the mileage, distance and gas price.

Fuel economy conversion

Fuel economy is the relationship between the distance a vehicle travels and the amount of fuel it consumes. When calculating, it's important to distinguish between the US and imperial gallon as they represent different values. US gallons are used mostly in the Unites States (unsurprisingly) but also in some Caribbean and Latin American countries. Imperial gallon is a unit you can encounter in some Commonwealth countries such as the United Kingdom and Canada. Liters per 100 kilometers are used almost anywhere else on the planet.

Another important difference is between the measurement systems - when using miles (either imperial or US) per gallon, the higher the value, the more efficient the vehicle is. On the other hand, those using liters per 100 km usually hope for a lower score as it results in smaller gas bills. 1 liter per 100 kilometers equals 235.2 US MPG or 282.5 Imperial MPG. At the same time 1 US MPG equals 235.2 liters per 100 kg. 1 US MPG = 1.201 UK MPG while 1 UK MPG is 0.8327 US MPG. These are the basic equations of fuel economy conversion.

If you want to go deeper into the topic, check out our speed calculator which deals with the trinity of time, distance and speed; while the acceleration calculator deals with how the velocity changes over time or how much a given force moves an object with a given mass by.

Piotr Małek

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MPG Converter - Fuel Economy Conversion
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