What is the difference between gallon (US) and gallon (UK)?

Gallon (US) is defined as exactly 231 cubic inches or about 3.7854 liters, while gallon (UK), or imperial gallon, is defined as exactly 4.54609 liters. This makes the UK gallon larger than the US gallon.

Why should I convert from gallon (US) to gallon (UK)?

Converting ensures accurate volume measurements and reporting when dealing with products, fuels, or flow measurements between countries or contexts that use different gallon standards.

Can I use this conversion for fuel economy calculations?

Yes, the US gallon is commonly used for fuel economy (miles per gallon) in the United States, so converting to UK gallons may be needed for comparisons or engineering purposes.

How to Convert from Gallon (US) to Gallon (UK)?

Learn the straightforward method to convert volume from gallon (US) to gallon (UK). Understand the definitions, use cases, and practical steps to get accurate conversions for fuel, liquid packaging, and industrial measurements.

Gallon (US) [gal (US)]

Gallon (UK) [gal (UK)]

Please check your input. It must be a valid numeric value.

Gallon (US) [gal (US)] to Gallon (UK) [gal (UK)] Conversion Table

Gallon (US) [gal (US)]	Gallon (UK) [gal (UK)]

Custom Unit Conversion Table Generator – Instant Printable Conversion Tables

Start Value

Enter the starting number (positive decimal or integer ≥ 0). Example: 0.1, 1, 5.

End Value

Enter the ending number (positive decimal or integer > Start Value). Example: 10, 50, 100.

Interval

Enter the step size (positive decimal > 0 and < End Value – Start Value). Example: 1.0, 2.5.

Gallon (US) [gal (US)] to Gallon (UK) [gal (UK)] Conversion Table
Gallon (US) [gal (US)]	Gallon (UK) [gal (UK)]

Explore More Volume Units Converter

What Is This Tool?

This unit converter helps you change volume measurements from gallon (US) to gallon (UK). It is essential for applications involving liquid volumes where different gallon standards apply, such as fuel measurement, labeling consumer products, and industrial flow rates.

How to Use This Tool?

Enter a volume value in gallon (US).
Select gallon (US) as the original unit and gallon (UK) as the target unit.
Run the conversion to obtain the equivalent gallon (UK) volume.

Key Features

Converts precisely between gallon (US) and gallon (UK) volume units.
Useful for industries like fuel, packaging, and marine operations.
Browser-based tool requiring no installations.
Supports quick volume comparisons across measurement standards.

Examples

5 gallon (US) converts to approximately 4.1634 gallon (UK).
10 gallon (US) converts to approximately 8.3267 gallon (UK).

Common Use Cases

Measuring and comparing fuel volumes at pumps across the US and UK.
Labeling consumer liquids such as milk, oils, and cleaning products correctly.
Reporting flow rates in engineering and HVAC contexts using imperial units.
Estimating marine bunkering volumes where imperial gallons are standard.
Describing traditional container sizes in regulatory or historical settings.

Tips & Best Practices

Verify unit definitions before converting to ensure proper context.
Use this tool for quick volume conversions relevant to liquids.
Remember to consider rounding when working with precise engineering data.
Confirm regional standards when reporting volumes for regulatory compliance.

Limitations

The conversion is based on exact unit definitions without rounding.
Practical applications may require dealing with rounding differences.
Regional measurement standards could affect required conversion precision.

Frequently Asked Questions

What is the difference between gallon (US) and gallon (UK)?: Gallon (US) is defined as exactly 231 cubic inches or about 3.7854 liters, while gallon (UK), or imperial gallon, is defined as exactly 4.54609 liters. This makes the UK gallon larger than the US gallon.
Why should I convert from gallon (US) to gallon (UK)?: Converting ensures accurate volume measurements and reporting when dealing with products, fuels, or flow measurements between countries or contexts that use different gallon standards.
Can I use this conversion for fuel economy calculations?: Yes, the US gallon is commonly used for fuel economy (miles per gallon) in the United States, so converting to UK gallons may be needed for comparisons or engineering purposes.

Key Terminology

Gallon (US): A volume unit defined as exactly 231 cubic inches or about 3.7854 liters, commonly used in the United States for liquid measurements.
Gallon (UK): Also known as the imperial gallon, a volume unit exactly equal to 4.54609 liters, used mainly in contexts using imperial measurements.
Flow Rate: The measurement of the volume of liquid moving through a system per unit time, often expressed in gallons per minute.

Quick Knowledge Check

Which volume is larger?

Gallon (US)

Gallon (UK)

They are the same size

What is the exact value of a gallon (US) in liters?

3.785411784 liters

4.54609 liters

231 liters

What is a common use for gallon (UK)?

Fuel economy measurement

Marine bunkering volumes

US motor fuel pumps

Share Us

Similar Calculators

Online Current Units Converter Online Surface Tension Units Converter Online Volume Charge Density Units Converter Online Prefixes Units Converter Online Illumination Units Converter