Fuel Economy Converter

Convert fuel economy between MPG (US/UK), km/L and L/100km.

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How to use Fuel Economy Converter

Three quick steps — no sign-up needed

  1. Step 1

    Enter the value

    Type the number you want to convert.

  2. Step 2

    Select From and To units

    Choose MPG (US), MPG (UK), km/L, or L/100km.

  3. Step 3

    Read the result

    Copy the converted value for homework, work, or travel planning.

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About Fuel Economy Converter

Fuel Economy Converter switches between MPG (US), MPG (UK), kilometres per litre, and litres per 100 km. Drivers searching "MPG to L/100km", "km/L to MPG", or "fuel consumption converter" need to compare car specs written in different regional units.

Enter a value, select From and To units, and read the result. US and UK gallons differ, so US MPG and UK MPG are not interchangeable. L/100km is an inverse-style measure - lower is more efficient.

Real-world consumption depends on speed, load, traffic, and maintenance. Spec-sheet figures are standardised tests, not a personal guarantee.

Benefits of Fuel Economy Converter

US and UK MPG Avoid gallon-size confusion.
km/L and L/100km Metric efficiency units covered.
Fair car comparisons Normalise brochure numbers.
Trip planning aid Estimate fuel style metrics consistently.

Frequently asked questions

Why is US MPG different from UK MPG?

The US gallon is smaller than the imperial UK gallon.

Is lower L/100km better?

Yes - fewer litres per 100 km means better efficiency.

How do I convert 30 MPG US to L/100km?

Enter 30, From MPG (US), To L/100km.

Does this calculate trip fuel cost?

It converts economy units; multiply distance and price separately for cost.

City vs highway ratings?

Convert the rating you care about; driving mix still changes results.