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

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

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

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

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

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.

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.

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