Fuel Efficiency Converter

Convert MPG (US & UK), L/100km, km/L, mi/L & More

Free online fuel efficiency converter for all common units. Instantly convert between miles per gallon (US & UK), liters per 100 kilometers, kilometers per liter, miles per liter, and more.

What is a Fuel Efficiency Converter?

A fuel efficiency converter is a tool that allows you to quickly and accurately convert between different units of fuel consumption and efficiency, such as miles per gallon (US & UK), liters per 100 kilometers, kilometers per liter, and more. This is essential for comparing vehicles, planning trips, and understanding fuel economy in different countries.

Supported Fuel Efficiency Units

  • Miles per gallon (US): Used in the United States. 1 US gallon = 3.785411784 liters.
  • Miles per gallon (UK): Used in the United Kingdom. 1 UK gallon = 4.54609 liters.
  • Liters per 100 kilometers (L/100km): Used in most countries. Lower values mean better efficiency.
  • Kilometers per liter (km/L): Used in many countries. Higher values mean better efficiency.
  • Miles per liter (mi/L): Used for direct metric/imperial comparison.
  • Kilometers per US gallon (km/gal US): Used for some international comparisons.
  • Kilometers per UK gallon (km/gal UK): Used for some international comparisons.

How to Use the Fuel Efficiency Converter

  1. Enter the value you want to convert.
  2. Select the unit you are converting from.
  3. View instant conversions to all other supported units below.

Why Use ManyCalcs Fuel Efficiency Converter?

  • Completely free and ad-free.
  • Supports all major fuel efficiency and consumption units.
  • Instant, accurate, and easy-to-use interface.
  • Mobile-friendly and accessible on any device.
  • Educational content for every unit.

Frequently Asked Questions

How do I convert MPG to L/100km?
Enter the value in MPG (US or UK), select the correct unit, and view the result in L/100km in the output list.
What is the difference between US MPG and UK MPG?
US gallon is 3.785411784 liters, UK gallon is 4.54609 liters. UK MPG values are higher for the same efficiency.
Is a lower L/100km value better?
Yes, lower L/100km means better fuel efficiency (less fuel used per distance).
Is this fuel efficiency converter free?
Yes, the ManyCalcs fuel efficiency converter is 100% free and always will be.

For more information, see Fuel economy in automobiles on Wikipedia.

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