UnitsConverter

Kilometers per Gallon (US) to Liters per 100 Kilometers Converter

Convert kilometers per US gallon to liters per 100 kilometers with our free online fuel consumption converter.

Quick Answer

1 Kilometers per Gallon (US) = 378.541178 liters per 100 kilometers

Formula: Kilometers per Gallon (US) × conversion factor = Liters per 100 Kilometers

Use the calculator below for instant, accurate conversions.

Our Accuracy Guarantee

All conversion formulas on UnitsConverter.io have been verified against NIST (National Institute of Standards and Technology) guidelines and international SI standards. Our calculations are accurate to 10 decimal places for standard conversions and use arbitrary precision arithmetic for astronomical units.

Last verified: February 2026Reviewed by: Sam Mathew, Software Engineer

Kilometers per Gallon (US) to Liters per 100 Kilometers Calculator

How to Use the Kilometers per Gallon (US) to Liters per 100 Kilometers Calculator:

  1. Enter the value you want to convert in the 'From' field (Kilometers per Gallon (US)).
  2. The converted value in Liters per 100 Kilometers will appear automatically in the 'To' field.
  3. Use the dropdown menus to select different units within the Fuel Consumption category.
  4. Click the swap button (⇌) to reverse the conversion direction.
Share:

How to Convert Kilometers per Gallon (US) to Liters per 100 Kilometers: Step-by-Step Guide

Converting Kilometers per Gallon (US) to Liters per 100 Kilometers involves multiplying the value by a specific conversion factor, as shown in the formula below.

Formula:

Conversion factor not available for this pair.

Example Calculation:

Example calculation not available for Kilometers per Gallon (US) to Liters per 100 Kilometers.

Disclaimer: For Reference Only

These conversion results are provided for informational purposes only. While we strive for accuracy, we make no guarantees regarding the precision of these results, especially for conversions involving extremely large or small numbers which may be subject to the inherent limitations of standard computer floating-point arithmetic.

Not for professional use. Results should be verified before use in any critical application. View our Terms of Service for more information.

Need to convert to other fuel consumption units?

View all Fuel Consumption conversions →
📊 Fuel Consumption Table

Print-friendly conversion reference

📋 Unit Symbols

Copy km/gal (US) & L/100km symbols

What is a Kilometers per Gallon (US) and a Liters per 100 Kilometers?

Kilometers per Gallon (US) (symbol: km/gal) is a unit of fuel economy expressing the distance in kilometers traveled per US liquid gallon of fuel consumed.

Formula: $$ \text{Economy (km/gal)} = \frac{\text{Distance (km)}}{\text{Fuel (US Gallons)}} $$

The "Hybrid" Nature:

  • Numerator: Kilometers (SI Metric System)
  • Denominator: US Gallon (US Customary System)
  • Note: This is distinct from km/gal (UK), which uses the Imperial gallon (20% larger).

Liters per 100 Kilometers (symbol: L/100km or l/100km) is a unit of fuel consumption.

Formula: $$ \text{Consumption (L/100km)} = \left( \frac{\text{Fuel Used (Liters)}}{\text{Distance (Kilometers)}} \right) \times 100 $$

Why "Consumption" vs. "Economy"?

  • Economy (MPG, km/L): Focuses on distance. "How far can I go?"
  • Consumption (L/100km): Focuses on fuel. "How much will it cost?" From an engineering and environmental standpoint, consumption is more useful because it scales linearly with cost and pollution.
  • Saving 1 L/100km always saves the same amount of fuel over a given distance.
  • Increasing MPG by 1 does not always save the same amount (the "MPG Illusion").

Note: The Kilometers per Gallon (US) is part of the metric (SI) system, primarily used globally in science and trade. The Liters per 100 Kilometers belongs to the metric (SI) system.

History of the Kilometers per Gallon (US) and Liters per 100 Kilometers

The Cross-Border Problem

The primary driver for this unit's existence is geography. The United States (US Gallons/Miles) shares a massive border with Canada (Liters/Kilometers) and Mexico (Liters/Kilometers).

  • Scenario: A Canadian drives their metric car into the US and buys gas in gallons.
  • Scenario: An American drives their US car into Mexico and sees road signs in kilometers. In these situations, drivers often perform mental math that mixes units, resulting in "kilometers per gallon."

Scientific Data Migration

In the late 20th century, as global industries moved to the metric system, legacy databases in the US often contained fuel data in gallons. When integrating this with location data (which had switched to kilometers), the intermediate unit km/gal often appeared in spreadsheets and engineering reports before being fully converted to km/L or L/100km.

The European Standard

As the automotive industry developed in Europe (Germany, France, Italy), engineers needed a way to quantify engine efficiency. Since the metric system was already established, measuring the volume of fuel (liters) over a standard distance (100 km) became the norm.

Canadian Metrication (1970s)

Canada provides a unique case study.

  • Pre-1975: Used Imperial MPG (UK gallons).
  • Post-1975: Switched to L/100km.
  • Today: While the official sticker is L/100km, many Canadians still mentally convert to MPG, leading to a confusing mix of US MPG, UK MPG, and L/100km in daily conversation.

The WLTP Era (2017-Present)

The Worldwide Harmonised Light Vehicle Test Procedure (WLTP) is the modern global standard for testing cars. It reports results primarily in L/100km (and CO2 g/km) because these metrics are essential for calculating carbon taxes and fleet emission targets in the EU.

Common Uses and Applications: kilometers per US gallon vs liters per 100 kilometers

Explore the typical applications for both Kilometers per Gallon (US) (metric) and Liters per 100 Kilometers (metric) to understand their common contexts.

Common Uses for kilometers per US gallon

1. International Logistics

Trucking companies operating between the US, Canada, and Mexico often have telematics systems that handle mixed data. A truck might report fuel level in gallons (US sensors) but location in kilometers (GPS standard). The raw efficiency metric becomes km/gal.

2. Vehicle Import/Export

When US cars are exported to metric countries (e.g., the Middle East or Caribbean), owners might initially track fuel economy in km/gal if they update the odometer to km but keep the owner's manual reference for tank size in gallons.

3. Engineering Conversions

It serves as a "stepping stone" unit.

  • Step 1: Convert Miles to Kilometers. (Result: km/gal)
  • Step 2: Convert Gallons to Liters. (Result: km/L)

When to Use liters per 100 kilometers

Where is it used?

  • Europe: Exclusive standard.
  • Canada: Official standard.
  • Australia/NZ: Official standard.
  • China: Official standard.
  • South Africa: Official standard.

Emissions Regulations

Governments love L/100km because it links directly to CO2.

  • Burning 1 Liter of petrol produces ~2.3 kg of CO2.
  • Therefore, a 5 L/100km car emits 115 g CO2/km.
  • A 10 L/100km car emits 230 g CO2/km.
  • This linear relationship makes taxing pollution easy.

Conversion Table: Kilometers per Gallon (US) to Liters per 100 Kilometers

Kilometers per Gallon (US) (km/gal (US))Liters per 100 Kilometers (L/100km)
0.5757.082
1378.541
1.5252.361
2189.271
575.708
1037.854
2515.142
507.571
1003.785
2501.514
5000.757
1,0000.379

People Also Ask

How do I convert Kilometers per Gallon (US) to Liters per 100 Kilometers?

To convert Kilometers per Gallon (US) to Liters per 100 Kilometers, enter the value in Kilometers per Gallon (US) in the calculator above. The conversion will happen automatically. Use our free online converter for instant and accurate results. You can also visit our fuel consumption converter page to convert between other units in this category.

Learn more →

What is the conversion factor from Kilometers per Gallon (US) to Liters per 100 Kilometers?

The conversion factor depends on the specific relationship between Kilometers per Gallon (US) and Liters per 100 Kilometers. You can find the exact conversion formula and factor on this page. Our calculator handles all calculations automatically. See the conversion table above for common values.

Can I convert Liters per 100 Kilometers back to Kilometers per Gallon (US)?

Yes! You can easily convert Liters per 100 Kilometers back to Kilometers per Gallon (US) by using the swap button (⇌) in the calculator above, or by visiting our Liters per 100 Kilometers to Kilometers per Gallon (US) converter page. You can also explore other fuel consumption conversions on our category page.

Learn more →

What are common uses for Kilometers per Gallon (US) and Liters per 100 Kilometers?

Kilometers per Gallon (US) and Liters per 100 Kilometers are both standard units used in fuel consumption measurements. They are commonly used in various applications including engineering, construction, cooking, and scientific research. Browse our fuel consumption converter for more conversion options.

For more fuel consumption conversion questions, visit our FAQ page or explore our conversion guides.

Helpful Conversion Guides

Learn more about unit conversion with our comprehensive guides:

📚 How to Convert Units

Step-by-step guide to unit conversion with practical examples.

🔢 Conversion Formulas

Essential formulas for fuel consumption and other conversions.

⚖️ Metric vs Imperial

Understand the differences between measurement systems.

⚠️ Common Mistakes

Learn about frequent errors and how to avoid them.

View All Guides →

All Fuel Consumption Conversions

Miles per Gallon (US) to Miles per Gallon (UK)Miles per Gallon (US) to Kilometers per LiterMiles per Gallon (US) to Liters per 100 KilometersMiles per Gallon (US) to Miles per LiterMiles per Gallon (US) to Kilometers per Gallon (US)Miles per Gallon (US) to Kilometers per Gallon (UK)Miles per Gallon (UK) to Miles per Gallon (US)Miles per Gallon (UK) to Kilometers per LiterMiles per Gallon (UK) to Liters per 100 KilometersMiles per Gallon (UK) to Miles per LiterMiles per Gallon (UK) to Kilometers per Gallon (US)Miles per Gallon (UK) to Kilometers per Gallon (UK)Kilometers per Liter to Miles per Gallon (US)Kilometers per Liter to Miles per Gallon (UK)Kilometers per Liter to Liters per 100 KilometersKilometers per Liter to Miles per LiterKilometers per Liter to Kilometers per Gallon (US)Kilometers per Liter to Kilometers per Gallon (UK)Liters per 100 Kilometers to Miles per Gallon (US)Liters per 100 Kilometers to Miles per Gallon (UK)Liters per 100 Kilometers to Kilometers per LiterLiters per 100 Kilometers to Miles per LiterLiters per 100 Kilometers to Kilometers per Gallon (US)Liters per 100 Kilometers to Kilometers per Gallon (UK)Miles per Liter to Miles per Gallon (US)Miles per Liter to Miles per Gallon (UK)Miles per Liter to Kilometers per LiterMiles per Liter to Liters per 100 KilometersMiles per Liter to Kilometers per Gallon (US)Miles per Liter to Kilometers per Gallon (UK)Kilometers per Gallon (US) to Miles per Gallon (US)Kilometers per Gallon (US) to Miles per Gallon (UK)Kilometers per Gallon (US) to Kilometers per LiterKilometers per Gallon (US) to Miles per LiterKilometers per Gallon (US) to Kilometers per Gallon (UK)Kilometers per Gallon (UK) to Miles per Gallon (US)Kilometers per Gallon (UK) to Miles per Gallon (UK)Kilometers per Gallon (UK) to Kilometers per LiterKilometers per Gallon (UK) to Liters per 100 KilometersKilometers per Gallon (UK) to Miles per LiterKilometers per Gallon (UK) to Kilometers per Gallon (US)

Other Fuel Consumption Units and Conversions

Explore other fuel consumption units and their conversion options:

Verified Against Authority Standards

All conversion formulas have been verified against international standards and authoritative sources to ensure maximum accuracy and reliability.

EPA Fuel Economy Standards

US Environmental Protection Agency — Official fuel economy measurement standards

Last verified: February 19, 2026