Convert UK Gallons to Fluid Ounces (US)
Convert UK Gallons to Fluid Ounces (US) instantly. 1 UK Gallon (gal (UK)) equals 153.7216 Fluid Ounces (US) (fl oz).
UK Gallons to Fluid Ounces (US) conversion table
| UK Gallons (gal (UK)) | Fluid Ounces (US) (fl oz) |
|---|---|
| 1 gal (UK) | 153.7216 fl oz |
| 2 gal (UK) | 307.4432 fl oz |
| 3 gal (UK) | 461.1648 fl oz |
| 5 gal (UK) | 768.608 fl oz |
| 10 gal (UK) | 1,537.22 fl oz |
| 20 gal (UK) | 3,074.43 fl oz |
| 50 gal (UK) | 7,686.08 fl oz |
| 100 gal (UK) | 15,372.16 fl oz |
| 500 gal (UK) | 76,860.8 fl oz |
| 1,000 gal (UK) | 153,721.59 fl oz |
1 UK Gallon = 153.7216 Fluid Ounces (US) · multiply UK Gallons by 153.7216
About converting UK Gallons to Fluid Ounces (US)
UK Gallons (gal (UK)) and Fluid Ounces (US) (fl oz) are both units of volume, so converting between them is a single multiplication: multiply your UK Gallons figure by 153.7216. Ten UK Gallons comes to 1,537.22 Fluid Ounces (US), and a hundred works out at 15,372.16 Fluid Ounces (US).
Rule of thumb: going from UK Gallons to Fluid Ounces (US) multiplies, so the figure always grows — one UK Gallon is already 153.7216 Fluid Ounces (US). If your answer came out smaller, you have the conversion the wrong way round.
What is an UK Gallon?
The imperial gallon is defined as exactly 4.54609 liters, but it started as something far more tangible: the volume occupied by ten pounds of water. Britain adopted it in the 1824 reform that swept away a tangle of older gallons — wine, ale and corn measures each had their own — and much of the Commonwealth followed. It is noticeably larger than the US gallon that America retained, so a British car advertised at 50 miles per gallon is genuinely more frugal than an American one quoting the same number. It survives today mainly in fuel-economy figures, since UK forecourts sell petrol by the liter.
What is a Fluid Ounce (US)?
A fluid ounce measures volume, not weight, despite sharing a name with the ounce on a kitchen scale — the two are related only loosely, through the weight of water. The US and imperial fluid ounces are different sizes, and counterintuitively the imperial one is the smaller, even though the imperial gallon is the bigger of the two: the imperial gallon divides into 160 fluid ounces, the US gallon into just 128. The gap is small enough to slip past a reader and large enough to matter, which makes it a reliable trap in cocktail recipes and drink can sizes.
To put both in perspective: the UK gallon began as the volume of ten pounds of water, while a US shot of spirits is about one and a half fluid ounces.
The converter above updates as you type, and the table lists common values for quick reference. Need the opposite direction? Use the Fluid Ounces (US) to UK Gallons converter, or browse all Volume converters.
Frequently asked questions
How many Fluid Ounces (US) are in one UK Gallon?
There are 153.7216 Fluid Ounces (US) in one UK Gallon.
How do I convert UK Gallons to Fluid Ounces (US)?
Multiply the number of UK Gallons by 153.7216. For example, 10 UK Gallons = 1,537.22 Fluid Ounces (US).
What is 100 UK Gallons in Fluid Ounces (US)?
100 UK Gallons is equal to 15,372.16 Fluid Ounces (US).
How do I convert Fluid Ounces (US) to UK Gallons?
Multiply the Fluid Ounces (US) value by 0.006505 (or divide by 153.7216).
Is this UK Gallons to Fluid Ounces (US) conversion exact?
The definition is exact — UK Gallons and Fluid Ounces (US) are both fixed against the same base by international agreement — but the decimal shown here is rounded for readability, because the true ratio does not terminate. For engineering or scientific work, carry more decimal places than this page displays.
What is an UK Gallon?
The imperial gallon is defined as exactly 4.54609 liters, but it started as something far more tangible: the volume occupied by ten pounds of water. Britain adopted it in the 1824 reform that swept away a tangle of older gallons — wine, ale and corn measures each had their own — and much of the Commonwealth followed. It is noticeably larger than the US gallon that America retained, so a British car advertised at 50 miles per gallon is genuinely more frugal than an American one quoting the same number. It survives today mainly in fuel-economy figures, since UK forecourts sell petrol by the liter.
What is a Fluid Ounce (US)?
A fluid ounce measures volume, not weight, despite sharing a name with the ounce on a kitchen scale — the two are related only loosely, through the weight of water. The US and imperial fluid ounces are different sizes, and counterintuitively the imperial one is the smaller, even though the imperial gallon is the bigger of the two: the imperial gallon divides into 160 fluid ounces, the US gallon into just 128. The gap is small enough to slip past a reader and large enough to matter, which makes it a reliable trap in cocktail recipes and drink can sizes.