Convert UK gallons to US gallons
Enter a value in UK gallons (UK gal) to get US gallons (US gal). One UK gallon is 1.2009 US gallons; one US gallon is 0.832674 UK gallons.
How to use the UK gallon to US gallon
- Type the number of UK gallons.
- Click Convert.
- Read the result in US gallons, plus the same value in every other volume unit.
UK gal to US gal formula
US gallons = UK gallons × 1.2009. To go the other way, UK gallons = US gallons × 0.832674 (see US gallons to UK gallons).
Worked example
12 UK gal × 1.2009 = 14.4114 US gal.
UK gallons to US gallons conversion table
| UK gallons | US gallons |
|---|---|
| 0.1 UK gal | 0.120095 US gal |
| 0.5 UK gal | 0.600475 US gal |
| 1 UK gal | 1.2009 US gal |
| 2 UK gal | 2.4019 US gal |
| 3 UK gal | 3.6028 US gal |
| 5 UK gal | 6.0047 US gal |
| 10 UK gal | 12.0095 US gal |
| 20 UK gal | 24.019 US gal |
| 25 UK gal | 30.0237 US gal |
| 50 UK gal | 60.0475 US gal |
| 100 UK gal | 120.095 US gal |
| 250 UK gal | 300.2375 US gal |
| 500 UK gal | 600.475 US gal |
| 1,000 UK gal | 1,200.95 US gal |
About the UK gallon
Exactly 4.54609 litres, about 20% larger than the US gallon. Still used for fuel economy (mpg) in the UK.
About the US gallon
Exactly 3.785411784 litres. Fuel in the USA.
Related conversions
Frequently asked questions
How many US gallons in a UK gallon?
1.2009 US gallons.
How many UK gallons in a US gallon?
0.832674 UK gallons.
Is the factor exact?
The factor 1.2009 is derived from the units' exact definitions; only the display is rounded.
Privacy
This tool runs entirely inside your browser using WebAssembly and the Canvas/File APIs. Your files are never uploaded to ToolFlint or any third party; you can verify this in your browser's network tab or by switching to airplane mode after the page loads. Read how we process files.
Last updated 2026-09-23.