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

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

Quick Answer

1 Liters per 100 Kilometers = 378.541178 kilometers per US gallon

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

Use the calculator below for instant, accurate conversions.

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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

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

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

  1. Enter the value you want to convert in the 'From' field (Liters per 100 Kilometers).
  2. The converted value in Kilometers per Gallon (US) 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.
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How to Convert Liters per 100 Kilometers to Kilometers per Gallon (US): Step-by-Step Guide

Converting Liters per 100 Kilometers to Kilometers per Gallon (US) 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 Liters per 100 Kilometers to Kilometers per Gallon (US).

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.

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📋 Unit Symbols

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

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

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").

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).

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

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

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.

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.

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

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

Common Uses for 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.

When to Use 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)

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

Liters per 100 Kilometers (L/100km)Kilometers per Gallon (US) (km/gal (US))
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 Liters per 100 Kilometers to Kilometers per Gallon (US)?

To convert Liters per 100 Kilometers to Kilometers per Gallon (US), enter the value in Liters per 100 Kilometers 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 Liters per 100 Kilometers to Kilometers per Gallon (US)?

The conversion factor depends on the specific relationship between Liters per 100 Kilometers and Kilometers per Gallon (US). 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 Kilometers per Gallon (US) back to Liters per 100 Kilometers?

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

Learn more →

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

Liters per 100 Kilometers and Kilometers per Gallon (US) 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

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🔢 Conversion Formulas

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⚖️ Metric vs Imperial

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⚠️ Common Mistakes

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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