Fuel Efficiency Converter

Use this tool to convert between different units of fuel efficiency, such as MPG, km/L, L/100km, and more.

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Common Fuel Efficiency Conversions

MPG to L/100km mpg → L/100km
km/L to MPG km/L → mpg
L/100km to MPG L/100km → mpg
MPG to km/L mpg → km/L

What is Fuel Efficiency Conversion?

Fuel efficiency conversion is the process of converting measurements of fuel consumption or vehicle efficiency from one unit system to another. Our fuel converter tool helps you easily compare fuel economy figures across different countries that use different measurement standards.

The two main systems are miles per gallon (MPG), used primarily in the United States, and liters per 100 kilometers (L/100km), used in most other countries. Understanding these conversions is essential for comparing vehicle efficiency, calculating fuel costs for international travel, and evaluating carbon footprint across different regions.

Simply enter your value in the "From" field, select the original unit, choose your target unit in the "To" field, and the converter will instantly display the converted result along with the conversion formula.

Fuel Efficiency Conversion Examples

Vehicle Comparison Example

Comparing fuel efficiency of imported vs domestic cars:

  • 30 MPG = 7.84 L/100km
  • 25 MPG = 9.41 L/100km
  • 12 L/100km = 19.6 MPG

International Travel Example

Understanding European fuel consumption signs:

  • 6 L/100km = 39.2 MPG
  • 8 L/100km = 29.4 MPG
  • 15 MPG = 15.7 km/L

Fleet Management Example

Calculating fuel costs for international fleet:

  • 20 MPG = 11.76 L/100km
  • 18 km/L = 42.5 MPG
  • 10 L/100km = 23.5 MPG

Frequently Asked Questions

How do I convert MPG to L/100km?

To convert miles per gallon to liters per 100 kilometers, divide 235.215 by the MPG value. For example, 30 MPG ÷ 235.215 = 7.84 L/100km. Higher MPG means lower L/100km, indicating better fuel efficiency.

What is the difference between US and UK MPG?

US MPG uses US gallons (3.785 liters), while UK (Imperial) MPG uses imperial gallons (4.546 liters). One UK MPG equals approximately 1.2 US MPG. This is important when comparing UK and US vehicle specifications.

How many km/L in 10 L/100km?

To convert L/100km to km/L, divide 100 by the L/100km value. For example, 100 ÷ 10 L/100km = 10 km/L. This means the vehicle travels 10 kilometers on one liter of fuel.

What is considered good fuel efficiency?

Good fuel efficiency is typically considered 25-30+ MPG (9.4-7.8 L/100km) for gasoline vehicles. Electric vehicles and hybrids often exceed 50 MPG (4.7 L/100km). Diesel vehicles typically achieve 30-40 MPG (7.8-5.9 L/100km).

How do I calculate fuel cost using these conversions?

First convert your vehicle's efficiency to the local measurement system. Then multiply fuel consumption (L/100km or L/km) by distance and fuel price. For example, at $1.50/L, a car consuming 8 L/100km traveling 500km costs $60 (8 × 5 × $1.50).