What is US gallon?

A US gallon is a volume unit equal to 128 US fluid ounces, or approximately 3.785 litres. It is the standard unit for fuel, milk, and other liquid products in the United States.

What is Imperial fluid ounce?

An Imperial fluid ounce is a volume unit used in the United Kingdom equal to approximately 28.41 millilitres. It is used in British cooking recipes, beverage servings, and pharmaceutical labelling.

Worked examples

1 US gallon = 133.22786954 Imperial fluid ounce

1 Imperial fluid ounce = 0.02841306 litre

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