Direct conversion
Convert gallon (UK) [gal UK] to fluid ounce (US) [fl oz US] instantly with formula, examples, chart, and FAQs.
1 gallon (UK) [gal UK] = 153.72159 fluid ounce (US) [fl oz US]
1 gallon (UK) [gal UK] = 153.72159 fluid ounce (US) [fl oz US]
Example: 1 gallon (UK) [gal UK] equals 153.72159 fluid ounce (US) [fl oz US].
Volume conversions use cubic metre as the reference unit. US liquid units, metric litres, and cubic units are converted with fixed factors stored in the unit table.
Displayed results are rounded for readability. The calculator keeps enough precision for everyday use and switches to scientific notation for very large or very small values. Last reviewed: 2026-08-14.
The gallon (UK) (gal UK) is a volume unit used to express measurements in this converter.
HistoryThis unit is included because it appears in practical measurement systems, technical references, product specifications, or everyday conversion needs.
Current useUse gallon (UK) when comparing volume values, checking specifications, converting between systems, or preparing quick estimates.
The US fluid ounce is a liquid volume unit equal to 29.5735295625 milliliters.
HistoryFluid ounces developed from customary liquid measures and differ from imperial fluid ounces.
Current useUS fluid ounces are used for beverages, medicine labels, recipes, cosmetics, and packaged liquids.
| gallon (UK) [gal UK] | fluid ounce (US) [fl oz US] |
|---|---|
| 1 | 153.72159 |
| 2 | 307.443181 |
| 5 | 768.607952 |
| 10 | 1537.215905 |
| 20 | 3074.43181 |
| 25 | 3843.039762 |
| 50 | 7686.079524 |
| 100 | 15372.159048 |
| 1000 | 153721.590478 |
Use this formula: 1 gallon (UK) [gal UK] = 153.72159 fluid ounce (US) [fl oz US] Enter your value in the calculator and the result updates instantly.
1 gallon (UK) [gal UK] equals 153.72159 fluid ounce (US) [fl oz US].
Yes. Use the swap button in the calculator or open the related reverse conversion link when it is listed on this page.