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MPG to km/L Converter

Convert miles per US gallon to kilometers per liter, with mpg (UK), L/100 km and L/km shown alongside.

What this tool does

Convert miles per US gallon to kilometers per liter, with mpg (UK), L/100 km and L/km shown alongside. Type an amount in miles per US gallon (mpg US), choose the units, and the tool converts it to kilometers per liter. It offers 5 fuel economy units and also shows the same amount in the others.

Inputs

  • Value: A number.
  • From: Choose one: Mile per US gallon (mpg US), Kilometer per liter, Mile per imperial gallon (mpg UK), Liter per kilometer, Liter per 100 kilometers. Starts as Mile per US gallon (mpg US).
  • To: Choose one of the same 5 units as "From". Starts as Kilometer per liter.

How to use

  1. Enter the amount you want to convert.
  2. Choose the unit to convert from and the unit to convert to.
  3. Read the result: the converted amount and the same amount in the other units. It appears once every required field has a valid value.

Worked examples

Conversions from miles per US gallon (mpg US) to kilometers per liter:

  • 1 mpg (US) ≈ 0.425144 km/L
  • 5 mpg (US) ≈ 2.125719 km/L
  • 10 mpg (US) ≈ 4.251437 km/L
  • 50 mpg (US) ≈ 21.257185 km/L
  • 100 mpg (US) ≈ 42.514371 km/L

Multiply the number of miles per US gallon (mpg US) by about 0.425144 to get kilometers per liter. The factor follows from exact definitions. It has more digits than fit here, so it is shown rounded.

Sources: Mile per US gallon (mpg US): exact by definition. Kilometer per liter: exact by definition.

Limitations

  • Converts the unit of a fuel economy figure only. It does not work out fuel cost, trip fuel or a car's real-world economy.
  • A US gallon and an imperial gallon are different volumes, so mpg (US) and mpg (UK) are shown as separate units.

FAQs

Q: How do I convert mpg to km/L?
A: Multiply mpg (US) by about 0.4251. 30 mpg (US) is about 12.8 km/L.
Q: Is this the US or the UK gallon?
A: The page starts from mpg (US). mpg (UK) is listed as its own unit and 1 mpg (US) is about 1.201 mpg (UK).

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