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Fuel Efficiency Converter

Convert fuel efficiency between mpg (US and UK), km/L and L/100 km.

How it works Report a problem

Fuel Efficiency Converter

Legendary consumption mapping with mileage-perfect precision.

CONVERTED ECONOMY
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Unit Name

Multi-Economy Breakdown

About the Fuel Efficiency Converter

Convert fuel efficiency between mpg (US and UK), km/L and L/100 km.

How to use the Fuel Efficiency Converter

  1. Enter the Value and choose its Unit.
  2. Press Calculate Efficiency to see the equivalent values.

Formula and method

L/100 km = 235.215 ÷ mpg (US). Note that a lower L/100 km is better, while a higher mpg is better.

Worked example

30 mpg (US) is about 7.84 L/100 km.

Tips

  • US gallons are smaller than UK gallons, so check which one applies.

Frequently asked questions

Why do mpg values differ between the US and the UK?
A UK (imperial) gallon is about 20% larger than a US gallon.