How to Convert MPG to Litres/100Km

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How to Convert MPG to Litres/100Km
Know your car's fuel consumption in litres/100km. (gas image by Mat Hayward from

Fuel economy is characterised by the average distance travelled by a vehicle while consuming a certain amount of gasoline. The unit that expresses the car fuel economy level in the USA is the miles per gallon unit (MPG). However, Canada and European countries utilise a different measurement system for this purpose. Commonly, it is the number of litres needed for a car to travel 100 kilometres. The conversion from one unit to the other is a simple mathematical calculation.

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  1. 1

    Multiply the number of miles by 1.6093 to convert to kilometres. For example, 21 miles will correspond will yield the following number of kilometres: 21 x 1.6093 = 33.7953km.

  2. 2

    Multiply the gasoline volume in gallons by 3.7854 to convert it to litres: one gallon corresponds to 3.7854 litres.

  3. 3

    Divide litres by kilometres to calculate the gas amount required to drive one kilometre. This value is also called litres per kilometre (LPK). In our example, the LPK value is the following: 3.7854 / 33.7953 = 0.112 LPK.

  4. 4

    Multiply LPK by 100 to convert MPG into litres / 100 kilometres. In this example, it is 0.112 x 100 = 11.2 litres /100 kilometres.

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