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Kilometers per Gallon (UK) to Liters per 100 Kilometers Conversion Calculator: Free Online Tool

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

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

Kilometers per Gallon (UK)
Liters per 100 Kilometers

How to Use the Calculator:

  1. Enter the value you want to convert in the 'From' field (Kilometers per Gallon (UK)).
  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.

How to Convert Kilometers per Gallon (UK) to Liters per 100 Kilometers

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

Formula:

L/100km = 21.9969 / km/gal (UK)

Example Calculation:

Convert 30 kilometers per UK gallon: 21.9969 / 30 = 0.733231 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.

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

Kilometers per Gallon (UK), often abbreviated as km/gal (UK), is a unit of fuel efficiency. It measures the distance in kilometers (km) that a vehicle can travel using one Imperial gallon (UK gal) of fuel. It combines a metric unit of distance with an Imperial unit of volume.

Liters per 100 Kilometers (L/100km) is a unit of fuel consumption commonly used in the metric system. It measures the volume of fuel (in liters) required for a vehicle to travel a distance of 100 kilometers. Unlike units like MPG or km/L, a lower value indicates better fuel efficiency.

Note: The Kilometers per Gallon (UK) 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 (UK) and Liters per 100 Kilometers

This unit is not a standard international unit for fuel consumption. Its use typically arises in specific contexts where metric distances (kilometers) need to be related to fuel volumes measured in Imperial gallons, which are still sometimes used in the UK and some Commonwealth countries, although less frequently for official fuel efficiency ratings today. It might appear when comparing vehicle specifications or fuel data across regions that use different systems or during transitions between measurement systems.

The L/100km unit gained prominence alongside the adoption of the metric system in many parts of the world, particularly Europe, Canada, Australia, New Zealand, and parts of Asia and South America. It was chosen as a standard measure because it directly quantifies fuel consumption over a fixed, standard distance (100 km), which is often preferred for regulatory and comparative purposes over distance-per-unit-volume measures like km/L or MPG. Its adoption reflects a focus on the amount of resource used rather than the distance achieved per unit of resource.

Common Uses for kilometers per UK gallon and liters per 100 kilometers

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

Common Uses for kilometers per UK gallon

Kilometers per Gallon (UK) is rarely used in official vehicle specifications or everyday conversation. Standard units like Liters per 100 kilometers (L/100km), Miles per Gallon (UK MPG), or Kilometers per Liter (km/L) are far more common globally and within the UK itself. Its primary use might be in specific technical calculations, data conversions, or comparisons involving older data or equipment specified using Imperial gallons alongside metric distances.

Common Uses for liters per 100 kilometers

  • Official Vehicle Ratings: Standard unit for reporting fuel consumption figures by manufacturers and government agencies in many metric countries.
  • Vehicle Labeling: Displayed on mandatory fuel economy labels on new cars in regions like the EU, Canada, and Australia.
  • Consumer Comparison: Used by consumers to compare the fuel usage of different vehicles (remembering lower is better).
  • Fleet Management: Helps businesses track and manage fuel costs for vehicle fleets.
  • Environmental Reporting: Used in calculating vehicle emissions based on fuel consumed.

Frequently Asked Questions

Questions About Kilometers per Gallon (UK) (km/gal (UK))

Why is km/gal (UK) not commonly used?

Most countries and automotive manufacturers globally have standardized on either fully metric units (like km/L or L/100km) or, in specific regions like the US, customary units (MPG US). The UK predominantly uses MPG (UK) and increasingly L/100km. Hybrid units like km/gal (UK) introduce complexity and are generally avoided in official ratings and common usage to prevent confusion.

How does km/gal (UK) differ from km/gal (US)?

The key difference is the gallon size. The Imperial (UK) gallon is approximately 20% larger than the US gallon (1 UK gallon ≈ 4.546 liters, while 1 US gallon ≈ 3.785 liters). Therefore, for the same actual fuel efficiency, a vehicle's rating in km/gal (UK) will be numerically lower than its rating in km/gal (US) because it travels the same distance using a larger gallon measure.

How do I convert km/gal (UK) to km/L?

Divide the value in km/gal (UK) by the exact number of liters in an Imperial gallon: km/L = km/gal (UK) / 4.54609.

How do I convert km/gal (UK) to MPG (UK)?

Divide the value in km/gal (UK) by the exact number of kilometers in a mile: MPG (UK) = km/gal (UK) / 1.609344.

How do I convert km/gal (UK) to the common L/100km format?

Use the inverse relationship formula: L/100km = 454.609 / km/gal (UK). A higher km/gal (UK) value corresponds to a lower L/100km value (better fuel economy).

About Liters per 100 Kilometers (L/100km)

Is a lower L/100km value better?

Yes, a lower L/100km value indicates better fuel efficiency. It means the vehicle consumes less fuel to travel the same 100 kilometers.

How do I convert L/100km to km/L?

To convert Liters per 100 kilometers (L/100km) to Kilometers per Liter (km/L), divide 100 by the L/100km value: km/L = 100 / (L/100km). Note that km/L measures efficiency directly (higher is better).

How do I convert L/100km to MPG (US)?

To convert L/100km to US Miles Per Gallon (MPG), divide 235.21 by the L/100km value: MPG (US) ≈ 235.21 / (L/100km).

How do I convert L/100km to MPG (Imperial)?

To convert L/100km to Imperial Miles Per Gallon (MPG), used mainly in the UK, divide 282.48 by the L/100km value: MPG (Imperial) ≈ 282.48 / (L/100km).

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

Kilometers per Gallon (UK) (km/gal (UK))Liters per 100 Kilometers (L/100km)
1454.609
590.922
1045.461
2518.184
509.092
1004.546
5000.909
1,0000.455

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