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Miles per Gallon (UK) to Liters per 100 km Converter

Convert fuel efficiency from MPG UK to L/100km with this free calculator.

What this tool does

Convert fuel efficiency from MPG UK to L/100km with this free calculator. Type an amount in miles per imperial gallon (mpg UK), choose the units, and the tool converts it to liters per 100 kilometers. It converts between these two fuel economy units, in either direction.

Inputs

  • Value: A number.
  • From: Choose one: Mile per imperial gallon (mpg UK), Liter per 100 kilometers. Starts as Mile per imperial gallon (mpg UK).
  • To: Choose one of the same 2 units as "From". Starts as Liter per 100 kilometers.

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 liters per 100 kilometers:

  • 1 mpg (imp) ≈ 282.480936 L/100 km
  • 5 mpg (imp) ≈ 56.496187 L/100 km
  • 10 mpg (imp) ≈ 28.248094 L/100 km
  • 50 mpg (imp) ≈ 5.649619 L/100 km
  • 100 mpg (imp) ≈ 2.824809 L/100 km

Divide about 282.480936 by the number of miles per imperial gallon (mpg UK) to get liters per 100 kilometers. 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. Liter per 100 kilometers: 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 L/100 km?
A: Divide 282.481 by the mpg (UK) figure. 40 mpg (UK) is about 7.06 L/100 km.
Q: Which is better, a higher or lower number?
A: Miles per gallon measures distance per unit of fuel, so a higher number means less fuel used. Liters per 100 km measures fuel per distance, so a lower number means less fuel used.

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