What is Imperial gallon?

An Imperial gallon is a volume unit used in the United Kingdom equal to approximately 4.546 litres. It is larger than the US gallon and is commonly referenced for fuel efficiency (miles per gallon) in the UK.

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 Imperial gallon = 160 Imperial fluid ounce

1 Imperial fluid ounce = 0.02841306 litre

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