UK gallons (imp gal) to US gallons (gal) Conversion
UK gallons
The UK imperial gallon is a unit of volume equal to exactly 4.54609 litres, defined by the UK Weights and Measures Act 1985. It is approximately 20% larger than the US liquid gallon. The imperial gallon is still used in the United Kingdom, Ireland, and several Commonwealth countries for fuel sales, and in aviation for fuel loading in older aircraft. Four imperial quarts, eight imperial pints, or 160 imperial fluid ounces make one imperial gallon.
US gallons
The US liquid gallon is a unit of volume equal to exactly 3.785411784 litres, used primarily in the United States for fuel sales, beverage containers, and agricultural applications. It is divided into 4 quarts, 8 pints, or 128 fluid ounces. The US gallon is approximately 16.7% smaller than the imperial (UK) gallon — a difference with significant implications in fuel economy comparisons and recipe conversions.
| UK gallons (imp gal) | US gallons (gal) |
|---|---|
| 0.1 imp gal | 0.1201 gal |
| 1 imp gal | 1.2009 gal |
| 2 imp gal | 2.4019 gal |
| 3 imp gal | 3.6028 gal |
| 5 imp gal | 6.0047 gal |
| 10 imp gal | 12.0095 gal |
| 20 imp gal | 24.019 gal |
| 30 imp gal | 36.0285 gal |
| 50 imp gal | 60.0475 gal |
| 100 imp gal | 120.095 gal |
| 1000 imp gal | 1,200.9499 gal |
Frequently Asked Questions (FAQ)
How many US gallons are in 1 UK gallons?
1 UK gallons (imp gal) is exactly 1.2009 US gallons (gal).
How do I convert UK gallons to US gallons?
Multiply the value in UK gallons by 1.2009 to get the result in US gallons. Or use the converter above — type any number and see the result instantly.