Fuel Consumption Converter

Convert fuel economy units instantly

Convert fuel consumption between km/L, MPG (US and UK), L/100km, and more. Essential for comparing car fuel efficiency across different countries' measurement systems. Perfect for car buyers, travelers, and anyone comparing international vehicle specifications. All calculations are performed in your browser for complete privacy.

How to Use

Convert fuel consumption easily in 3 steps:

Enter value
Input the fuel consumption value you want to convert (e.g., 30 MPG or 10 km/L).
Select units
Choose the source unit (From) and target unit (To) from the dropdown menus.
Get result
The converted value appears instantly. Use the swap button to reverse the conversion direction.

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Enter Fuel Consumption

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Use Cases

This fuel consumption converter is useful in many situations:

1. Buying imported cars

When purchasing a car from another country, convert fuel economy specifications to your local unit. US cars use MPG, European cars use L/100km, and Japanese cars use km/L.

2. International travel

When renting a car abroad, understand fuel efficiency in local units. Know what 35 MPG means in km/L, or what 6 L/100km means in MPG.

3. Comparing vehicle specifications

Compare fuel efficiency of vehicles from different manufacturers that use different measurement systems. Make informed decisions based on standardized comparisons.

4. Calculating fuel costs

Convert fuel economy to your preferred unit to accurately calculate expected fuel costs for trips and daily commuting.

5. Environmental considerations

Compare CO2 emissions and environmental impact by converting fuel efficiency to a common unit for accurate comparisons.

6. Technical documentation

Convert fuel consumption values for technical reports, automotive journalism, or academic papers that need multiple unit systems.

About Fuel Consumption Units

Fuel consumption (fuel economy) measures how efficiently a vehicle uses fuel. Different regions use different units, which can be confusing when comparing vehicles internationally.

Distance per Volume Units

km/L (kilometers per liter) and MPG (miles per gallon) measure how far a vehicle can travel on a unit of fuel. Higher values mean better fuel efficiency. Japan and some Asian countries use km/L, while the US and UK use MPG (with different gallon sizes).

Volume per Distance Units

L/100km (liters per 100 kilometers) measures how much fuel is needed to travel a fixed distance. This is the European standard. Lower values mean better fuel efficiency - the opposite of MPG and km/L.

US vs UK Gallons

The US gallon (3.785 liters) and UK imperial gallon (4.546 liters) are different sizes. This means the same vehicle will have different MPG ratings in the US and UK. UK MPG values are about 20% higher than US MPG for the same actual fuel efficiency.

Common Conversion References

Quick reference: 10 km/L ≈ 23.5 MPG (US) ≈ 28.2 MPG (UK) ≈ 10 L/100km. A fuel-efficient car typically achieves 15+ km/L (35+ MPG US, 6.7 L/100km or less).

Frequently Asked Questions

Why are US and UK MPG different?

The US gallon (3.785 L) is smaller than the UK imperial gallon (4.546 L). The same car will show about 20% higher MPG in UK measurements than US measurements.

Which unit is most commonly used worldwide?

L/100km is used in most of Europe, Australia, and many other countries. MPG is used in the US and UK. km/L is common in Japan, India, and parts of South America.

Is higher or lower better for L/100km?

Lower is better for L/100km. It means the car uses less fuel per 100 km. This is the opposite of MPG and km/L where higher is better.

How do I convert MPG to L/100km?

For US MPG: L/100km = 235.215 / MPG. For UK MPG: L/100km = 282.481 / MPG. This converter handles these calculations automatically.

What's good fuel economy?

Generally, 13+ km/L (30+ MPG US, 7.8 L/100km or less) is considered good. Hybrid vehicles often achieve 20+ km/L (47+ MPG US, 5 L/100km or less).

Do electric vehicles use these units?

Electric vehicles use different units like kWh/100km or miles/kWh. Some regions convert to 'MPGe' (miles per gallon equivalent) for comparison with gasoline vehicles.

Why does manufacturer fuel economy differ from real-world?

Official ratings are from standardized tests. Real-world factors like driving style, traffic, terrain, weather, and air conditioning use can significantly affect actual fuel consumption.

How accurate is this converter?

This converter uses precise mathematical conversion factors. Results are accurate to multiple decimal places, suitable for professional and personal use.