Gallons (UK) to Gallons (US – Liquid) converter

To convert gallons (UK) to gallons (US – Liquid), enter the value in the first field. The result in gallons (US – Liquid) is calculated automatically using the exact conversion factor.

1 UK gal ≈ 1.2009499255 US gal
1 US gal ≈ 0.832674184629 UK gal

Formula: US gal ≈ UK gal × 1.2009499255
UK gal ≈ US gal × 0.832674184629

Definitions: 1 UK gal = 4.54609 L; 1 US gal = 231 in³

The imperial (UK) gallon is defined as exactly 4.54609 liters, about 20% larger than the US liquid gallon. It survives in British fuel-economy figures (miles per gallon) and is the base of the imperial system of capacity, in which the pint, quart, peck and bushel are all defined relative to it.

The US liquid gallon is the everyday gallon in the United States, used for fuel, milk, paint and most liquids sold by volume. It derives from the old English wine gallon, which was fixed at 231 cubic inches.

See the conversion table with commonly used values, handy for quick reference or study.