Imperial Gallon Conversions

Use this easy and mobile-friendly calculator to convert between Imperial Gallons and other units of Volume.
swap units ↺
1 Imperial Gallon ≈
1.2009499 U.S. Gallons
result rounded
Decimal places
Imperial Gallons
An Imperial gallon is a unit of volume sometimes used in the British commonwealth. It is exactly 4.54609 liters and is about 20% larger than a U.S. gallon.
Abbreviation: imp gal
A U.S. gallon is a unit of volume equal to 128 U.S. fluid ounces, or about 3.785 liters. It should not be confused with the imperial gallon used in the United Kingdom.
Common abbreviations: gal, US gal