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Fuel Consumption Converter

Convert between km/L, MPG (US and Imperial), and L/100km. Compare fuel efficiency across different measurement systems used worldwide.

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Formula

MPG = km/L x 2.3521 | L/100km = 235.21 / MPG

Different countries measure fuel efficiency differently. The US uses Miles per Gallon (MPG), Europe and Australia use Liters per 100km, and Japan uses km/L. Higher MPG or km/L means better efficiency. Lower L/100km means better efficiency.

Worked Example

12 km/L to MPG: US MPG = 12 x 2.3521 = 28.23 MPG L/100km = 100 / 12 = 8.33 L/100km This is average fuel efficiency for a mid-size sedan.

What Is Fuel Consumption And Its Measurement?

Fuel consumption measures how much fuel a vehicle uses over a given distance, indicating its efficiency. Different regions around the world use varying units to express this. Miles Per Gallon (MPG) is common in the United States and the United Kingdom, though their gallon sizes differ, leading to US MPG and Imperial MPG. A higher MPG value signifies better fuel efficiency, meaning more distance can be covered per unit of fuel. In contrast, many European countries and Australia utilize Liters per 100 kilometers (L/100km). This metric quantifies the volume of fuel required to travel 100 kilometers. For L/100km, a lower number indicates superior fuel efficiency. Japan frequently uses Kilometers per Liter (km/L), which is a direct inverse of L/100km in concept. Here, similar to MPG, a higher km/L value indicates that a vehicle can travel further on one liter of fuel, thus being more efficient. Understanding these distinct measurement systems is crucial for comparing vehicle specifications globally and making informed decisions about fuel economy.
  • Fuel efficiency is expressed differently worldwide: MPG (US and Imperial), L/100km, and km/L.
  • Higher MPG or km/L values mean better fuel economy.
  • Lower L/100km values indicate superior fuel efficiency.
  • US gallons are smaller than Imperial gallons, so US MPG numbers are typically lower for the same efficiency.

Accurately converting between these systems is essential for global comparisons and understanding your vehicle's true efficiency. Use our Fuel Consumption Converter to easily translate any value.

You can also calculate changes using our Percentage Calculator or Ratio Calculator.

Frequently Asked Questions

What is good fuel efficiency in MPG?

For cars: 30+ MPG is good, 40+ is excellent. Hybrids get 50+. SUVs and trucks typically get 15-25 MPG. Electric vehicles are measured differently (MPGe).

What is the difference between US MPG and UK MPG?

UK (Imperial) gallons are larger than US gallons (4.546L vs 3.785L). So UK MPG values are higher for the same car. UK MPG = US MPG x 1.201.

Why does Europe use L/100km?

L/100km directly tells you how many liters you need for a 100km trip, making it easy to calculate fuel costs. Lower is better. A car using 6 L/100km needs 6 liters for every 100km driven.

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