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Miles per Gallon (UK) to Kilometers per Liter Converter

Convert fuel efficiency from MPG UK to km/L with this free calculator.

What this tool does

Convert fuel efficiency from MPG UK to km/L with this free calculator. Type an amount in miles per imperial gallon (mpg UK), choose the units, and the tool converts it to kilometers per liter. It converts between these two fuel economy units, in either direction.

Inputs

  • Value: A number.
  • From: Choose one: Mile per imperial gallon (mpg UK), Kilometer per liter. Starts as Mile per imperial gallon (mpg UK).
  • To: Choose one of the same 2 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. It appears once every required field has a valid value.

Worked examples

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

  • 1 mpg (imp) ≈ 0.354006 km/L
  • 5 mpg (imp) ≈ 1.770031 km/L
  • 10 mpg (imp) ≈ 3.540062 km/L
  • 50 mpg (imp) ≈ 17.700309 km/L
  • 100 mpg (imp) ≈ 35.400619 km/L

Multiply the number of miles per imperial gallon (mpg UK) by about 0.354006 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 imperial gallon (mpg UK): 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.
  • Miles per gallon here means the imperial (UK) gallon of 4.54609 liters. Miles per US gallon is not on this page.

FAQs

Q: How do I convert UK mpg to km/L?
A: Multiply by about 0.354. 1 mpg (UK) is about 0.354 km/L, so 40 mpg (UK) is about 14.2 km/L.
Q: Is this the US or the UK gallon?
A: The imperial (UK) gallon, about 4.546 liters. Miles per US gallon is a different unit and gives a different answer.

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