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

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

Kilometers per Gallon (UK) to Miles per Gallon (UK) Calculator

Kilometers per Gallon (UK)
Miles per Gallon (UK)

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 Miles per Gallon (UK) 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 Miles per Gallon (UK)

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

Formula:

1 Kilometers per Gallon (UK) = 12.8418 miles per UK gallon

Example Calculation:

Convert 30 kilometers per UK gallon: 30 × 12.8418 = 385.255 miles per UK gallon

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 Miles per Gallon (UK)?

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.

Miles per Gallon (UK), often abbreviated as MPG (UK) or simply MPG in the UK context, is a unit of fuel efficiency used primarily within the Imperial system. It quantifies the distance in miles that a vehicle can travel using one Imperial gallon of fuel. A higher MPG (UK) 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 Miles per Gallon (UK) belongs to the imperial/US customary system.

History of the Kilometers per Gallon (UK) and Miles per Gallon (UK)

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 Imperial gallon was defined in the UK Weights and Measures Act of 1824 and became the standard measure for liquids. Consequently, MPG based on this gallon became the traditional measure of vehicle fuel efficiency in the United Kingdom and several Commonwealth countries. While the metric unit L/100km is now also used officially (especially for new car regulations and comparisons), MPG (UK) remains deeply ingrained in public understanding and is widely used by consumers and in the media.

Common Uses for kilometers per UK gallon and miles per UK gallon

Explore the typical applications for both Kilometers per Gallon (UK) (metric) and Miles per Gallon (UK) (imperial/US) 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 miles per UK gallon

  • Consumer Vehicle Choice (UK): A primary factor for UK consumers when comparing the running costs and environmental impact of different vehicles.
  • Manufacturer Advertising (UK): Often highlighted in car advertisements and brochures targeting the UK market.
  • Used Car Sales (UK): Frequently quoted figure when evaluating and selling pre-owned vehicles.
  • Fuel Cost Estimation: Used by drivers to estimate fuel consumption and costs for journeys.
  • Informal Benchmarking: Common unit used in everyday conversation about car performance in the UK.

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 Miles per Gallon (UK) (MPG (UK))

How is MPG (UK) different from MPG (US)?

The core difference is the gallon size. The Imperial gallon (UK) is larger than the US customary gallon (approximately 4.546 liters vs. 3.785 liters). Because a vehicle travels the same distance but the UK gallon contains more fuel, the MPG (UK) figure for a given vehicle will always be higher than its MPG (US) figure. Specifically, 1 MPG (UK) ≈ 1.201 MPG (US).

Is a higher MPG (UK) value better?

Yes, a higher MPG (UK) value signifies better fuel efficiency. It means the vehicle can cover more miles for each Imperial gallon of fuel consumed.

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

To convert Imperial Miles Per Gallon to Liters per 100 kilometers, use the formula: L/100km ≈ 282.48 / MPG (UK). Note that unlike MPG, a lower L/100km value indicates better fuel efficiency.

How do I convert MPG (UK) to MPG (US)?

To convert Imperial Miles Per Gallon to US Miles Per Gallon, use the formula: MPG (US) ≈ MPG (UK) * 0.83267.

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

To convert Imperial Miles Per Gallon to Kilometers per Liter, use the formula: km/L ≈ MPG (UK) * 0.3540. Like MPG, a higher km/L value indicates better fuel efficiency.

Conversion Table: Kilometers per Gallon (UK) to Miles per Gallon (UK)

Kilometers per Gallon (UK) (km/gal (UK))Miles per Gallon (UK) (MPG (UK))
10.621
53.107
106.214
2515.534
5031.069
10062.137
500310.686
1,000621.371

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