Convert US gallons to UK gallons
Enter a value in US gallons (US gal) to get UK gallons (UK gal). One US gallon is 0.832674 UK gallons; one UK gallon is 1.2009 US gallons.
How to use the US gallon to UK gallon
- Type the number of US gallons.
- Click Convert.
- Read the result in UK gallons, plus the same value in every other volume unit.
US gal to UK gal formula
UK gallons = US gallons × 0.832674. To go the other way, US gallons = UK gallons × 1.2009 (see UK gallons to US gallons).
Worked example
12 US gal × 0.832674 = 9.9921 UK gal.
US gallons to UK gallons conversion table
| US gallons | UK gallons |
|---|---|
| 0.1 US gal | 0.083267 UK gal |
| 0.5 US gal | 0.416337 UK gal |
| 1 US gal | 0.832674 UK gal |
| 2 US gal | 1.6653 UK gal |
| 3 US gal | 2.498 UK gal |
| 5 US gal | 4.1634 UK gal |
| 10 US gal | 8.3267 UK gal |
| 20 US gal | 16.6535 UK gal |
| 25 US gal | 20.8169 UK gal |
| 50 US gal | 41.6337 UK gal |
| 100 US gal | 83.2674 UK gal |
| 250 US gal | 208.1685 UK gal |
| 500 US gal | 416.3371 UK gal |
| 1,000 US gal | 832.6742 UK gal |
About the US gallon
Exactly 3.785411784 litres. Fuel in the USA.
About the UK gallon
Exactly 4.54609 litres, about 20% larger than the US gallon. Still used for fuel economy (mpg) in the UK.
Related conversions
Frequently asked questions
How many UK gallons in a US gallon?
0.832674 UK gallons.
How many US gallons in a UK gallon?
1.2009 US gallons.
Is the factor exact?
The factor 0.832674 is derived from the units' exact definitions; only the display is rounded.
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Last updated 2026-09-23.