Convert Imperial Gallon to Fluid Ounce (US)

What is a Imperial Gallon to Fluid Ounce (US) conversion?

One imperial gallon (gal (UK)) is equal to 153.72159046 fluid ounce (us) (fl oz). This relationship is fixed by international measurement standards and does not change. To convert any number of imperial gallon to fluid ounce (us), multiply your value by 153.72159046; to go the other way, divide by 153.72159046.

How to convert Imperial Gallon to Fluid Ounce (US)

The conversion formula is: 1 gal (UK) = 153.72159046 fl oz. Enter any value into the converter above and the result updates instantly. The formula is also shown alongside the answer so you can check the working or use it in your own calculations.

Where is this conversion used?

Volume conversions appear in cooking, chemistry, medicine, fuel measurement, and plumbing. The metric system uses litres and millilitres; the imperial system uses pints, gallons, and fluid ounces — and US and UK gallons differ from one another. Pharmacists, bartenders, chemists, plumbers, and fuel engineers routinely convert volumes. Note that a US gallon (3.785 L) and a UK/Imperial gallon (4.546 L) are not the same — always confirm which gallon is intended.

Helpful tip

A standard wine bottle holds 750 mL (0.75 L). A US pint of beer is 473 mL, while a UK pint is 568 mL — nearly 20% larger.