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Convert US miles per gallon to Imperial mpg, or L/100 km, etc...

Enter or change a value and press "convert" to calculate energy consumption units in various formats. See below for formulas used.

Discuss this tool in the forum: New in "Tools" menu: Fuel economy units conversion calculator
L/100 km
km / L
mpg (US)
mpg (Imp)
km/gal (US)
gallon (US) / 100 mi

Conversions used:

For calculations involving gasoline/electricity energy equivalency, the following conversions are used:

  • 1 US gallon = 114,500 BTU (conventional summer gasoline)
  • 1 kWh = 3412 BTU
  • 1 gallon (US) = 33.56 kWh
  • 1 litre = 8.87 kWh

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