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

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

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

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

How to Use the Calculator:

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

How to Convert Miles per Gallon (UK) to Kilometers per Gallon (US)

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

Formula:

1 Miles per Gallon (UK) = 0.0935185 kilometers per US gallon

Example Calculation:

Convert 30 miles per UK gallon: 30 × 0.0935185 = 2.80556 kilometers per US 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 Miles per Gallon (UK) and a Kilometers per Gallon (US)?

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.

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

Note: The Miles per Gallon (UK) is part of the imperial/US customary system, primarily used in the US, UK, and Canada for everyday measurements. The Kilometers per Gallon (US) belongs to the metric (SI) system.

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

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.

This unit is not a standard international or US unit for fuel consumption. Its use typically arises in specific, often informal, contexts where metric distances (kilometers) need to be related to fuel volumes measured in US gallons. This might occur when comparing vehicle specifications or fuel data between regions using different systems (e.g., comparing a European car's potential range using US fuel measurements) or during transitions between measurement systems.

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

Explore the typical applications for both Miles per Gallon (UK) (imperial/US) and Kilometers per Gallon (US) (metric) to understand their common contexts.

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.

Common Uses for kilometers per US gallon

Kilometers per Gallon (US) is rarely used in official vehicle specifications, regulations, or everyday conversation, especially within the United States where Miles per Gallon (US MPG) is the standard. Globally, Liters per 100 kilometers (L/100km) or Kilometers per Liter (km/L) are more common metric standards. Its primary use might be in specific technical calculations, data conversions, or informal comparisons involving US fuel volumes alongside metric distances.

Frequently Asked Questions

Questions 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.

About Kilometers per Gallon (US) (km/gal (US))

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

The United States primarily uses Miles per Gallon (US MPG) for vehicle fuel efficiency. Most other countries using the metric system prefer Kilometers per Liter (km/L) or Liters per 100 Kilometers (L/100km). Hybrid units like km/gal (US) mix systems and are generally avoided in official standards to prevent confusion.

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

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

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

Divide the value in km/gal (US) by the exact number of liters in a US gallon: km/L = km/gal (US) / 3.785411784.

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

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

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

Use the inverse relationship formula: L/100km = 378.5411784 / km/gal (US). A higher km/gal (US) value corresponds to a lower L/100km value (indicating better fuel economy).

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

Miles per Gallon (UK) (MPG (UK))Kilometers per Gallon (US) (km/gal (US))
11.34
56.7
1013.401
2533.502
5067.003
100134.006
500670.03
1,0001,340.059

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