Convert Fluid Ounces (US) to UK Gallons
Convert Fluid Ounces (US) to UK Gallons instantly. 1 Fluid Ounce (US) (fl oz) equals 0.006505 UK Gallons (gal (UK)).
Fluid Ounces (US) to UK Gallons conversion table
| Fluid Ounces (US) (fl oz) | UK Gallons (gal (UK)) |
|---|---|
| 1 fl oz | 0.006505 gal (UK) |
| 2 fl oz | 0.01301 gal (UK) |
| 3 fl oz | 0.01952 gal (UK) |
| 5 fl oz | 0.03253 gal (UK) |
| 10 fl oz | 0.06505 gal (UK) |
| 20 fl oz | 0.1301 gal (UK) |
| 50 fl oz | 0.3253 gal (UK) |
| 100 fl oz | 0.6505 gal (UK) |
| 500 fl oz | 3.2526 gal (UK) |
| 1,000 fl oz | 6.5053 gal (UK) |
1 Fluid Ounce (US) = 0.006505 UK Gallons · multiply Fluid Ounces (US) by 0.006505
About converting Fluid Ounces (US) to UK Gallons
Fluid Ounces (US) (fl oz) and UK Gallons (gal (UK)) are both units of volume, so converting between them is a single multiplication: multiply your Fluid Ounces (US) figure by 0.006505. Ten Fluid Ounces (US) comes to 0.06505 UK Gallons, and a hundred works out at 0.6505 UK Gallons.
Rule of thumb: going from Fluid Ounces (US) to UK Gallons divides, so the figure always shrinks — it takes about 153.7216 Fluid Ounces (US) to make a single UK Gallon. If your answer came out bigger, you have the conversion the wrong way round.
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.
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.
To put both in perspective: a US shot of spirits is about one and a half fluid ounces, while the UK gallon began as the volume of ten pounds of water.
The converter above updates as you type, and the table lists common values for quick reference. Need the opposite direction? Use the UK Gallons to Fluid Ounces (US) converter, or browse all Volume converters.
Frequently asked questions
How many UK Gallons are in one Fluid Ounce (US)?
There are 0.006505 UK Gallons in one Fluid Ounce (US).
How do I convert Fluid Ounces (US) to UK Gallons?
Multiply the number of Fluid Ounces (US) by 0.006505. For example, 10 Fluid Ounces (US) = 0.06505 UK Gallons.
What is 100 Fluid Ounces (US) in UK Gallons?
100 Fluid Ounces (US) is equal to 0.6505 UK Gallons.
How do I convert UK Gallons to Fluid Ounces (US)?
Multiply the UK Gallons value by 153.7216 (or divide by 0.006505).
Is this Fluid Ounces (US) to UK Gallons conversion exact?
The definition is exact — Fluid Ounces (US) and UK Gallons 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 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.
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.