Gallon (US) to Gallon (UK) Conversion Calculator: Free Online Tool
Convert US gallons to UK gallons with our free online volume converter.
Gallon (US) to Gallon (UK) Calculator
How to Use the Calculator:
- Enter the value you want to convert in the 'From' field (Gallon (US)).
- The converted value in Gallon (UK) will appear automatically in the 'To' field.
- Use the dropdown menus to select different units within the Volume category.
- Click the swap button (⇌) to reverse the conversion direction.
How to Convert Gallon (US) to Gallon (UK)
Converting Gallon (US) to Gallon (UK) involves multiplying the value by a specific conversion factor, as shown in the formula below.
Formula:
1 Gallon (US) = 0.832674 UK gallonsExample Calculation:
Convert 10 US gallons: 10 × 0.832674 = 8.326742 UK gallons
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 Gallon (US) and a Gallon (UK)?
The US liquid gallon (symbol gal US) is a unit of volume in the United States customary units system. It is legally defined as 231 cubic inches, which is exactly equal to 3.785411784 liters. It is commonly used for measuring larger quantities of liquids, such as gasoline, milk, and paint.
The UK gallon (Imperial gallon) is a unit of volume defined as 4.54609 litres.
Note: The Gallon (US) is part of the imperial/US customary system, primarily used in the US, UK, and Canada for everyday measurements. The Gallon (UK) belongs to the imperial/US customary system.
History of the Gallon (US) and Gallon (UK)
The gallon has ancient roots, evolving from various Roman and medieval units. The US liquid gallon is based on the wine gallon, which was standardized in England during the reign of Queen Anne in 1707 as 231 cubic inches. This definition was adopted by the United States. It differs from the Imperial gallon used in the UK and Canada.
The Imperial gallon was defined based on the volume of 10 pounds of distilled water weighed in air with brass weights with the barometer standing at 30 inches of mercury and at a temperature of 62 °F.
Common Uses for US gallons and UK gallons
Explore the typical applications for both Gallon (US) (imperial/US) and Gallon (UK) (imperial/US) to understand their common contexts.
Common Uses for US gallons
- US Fuel: Measuring fuel (gasoline, diesel) in the United States.
- US Beverages: Selling milk and other beverages in large containers in the US.
- Household Liquids: Measuring paint and other household liquids.
- Pools & Water: Pool capacity and water usage measurements in the US.
- Industry: Some industrial applications.
Common Uses for UK gallons
- Fuel Measurement: Used for measuring fuel (petrol, diesel) in the UK and some Commonwealth countries.
- Beverages: Selling milk and other beverages in large containers in the UK.
- Household Liquids: Measuring paint and other household liquids.
- Pools & Water: Pool capacity and water usage measurements in the UK.
- Industry: Some industrial applications in countries using the Imperial system.
Frequently Asked Questions
Questions About Gallon (US) (gal)
Is a US gallon the same as an Imperial gallon?
No. The US gallon (≈ 3.785 L) is smaller than the Imperial gallon (≈ 4.546 L). Always specify which gallon is being used if there's ambiguity.
How many quarts are in a US gallon?
There are exactly 4 US liquid quarts in 1 US liquid gallon.
How many liters are in a US gallon?
1 US liquid gallon is exactly 3.785411784 liters.
About Gallon (UK) (gal)
Is a UK gallon the same as a US gallon?
No, the UK (Imperial) gallon is defined as 4.54609 liters, while the US liquid gallon is defined as 3.785411784 liters. The UK gallon is approximately 20% larger than the US gallon.
How many pints are in a UK gallon?
There are exactly 8 Imperial pints in 1 UK (Imperial) gallon. This is the same number as in the US system, but since the Imperial pint is larger than the US pint, the total volume differs.
When did the UK adopt the Imperial gallon?
The Imperial gallon was established in 1824 as part of the British Weights and Measures Act, which standardized various units throughout the British Empire. Prior to this standardization, several different gallon measures were in use for different purposes.
Conversion Table: Gallon (US) to Gallon (UK)
| Gallon (US) (gal) | Gallon (UK) (gal) |
|---|---|
| 1 | 0.833 |
| 5 | 4.163 |
| 10 | 8.327 |
| 25 | 20.817 |
| 50 | 41.634 |
| 100 | 83.267 |
| 500 | 416.337 |
| 1,000 | 832.674 |