Volume
gal (US)tofl oz (UK)
Convert US gallons (gal (US)) to imperial fluid ounces (fl oz (UK)).
Factor1 gal (US) = 133.2279 fl oz (UK)
Converter
gal (US)
Accepts numbers or expressions, e.g. 150 + 14.7
Result
fl oz (UK)
Rendered to 6 significant figures.
Formula
Formula
fl oz (UK) = gal (US) × 133.2279
Multiply any value in US gallons by 133.2279 to obtain the value in imperial fluid ounces.
Worked example
Convert 1 gal (US) to fl oz (UK).
- 01Start with 1 gal (US).
- 02Multiply by the conversion factor: 1 × 133.2279 = 133.228 fl oz (UK).
Result1 gal (US) = 133.228 fl oz (UK)
Conversion table
| gal (US) | fl oz (UK) |
|---|---|
| 1 | 133.23 |
| 2 | 266.46 |
| 5 | 666.14 |
| 10 | 1332.3 |
| 20 | 2664.6 |
| 50 | 6661.4 |
| 100 | 13323 |
| 200 | 26646 |
| 500 | 66614 |
| 1000 | 1.3323e+5 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from gal (US) to fl oz (UK)?
1 gal (US) equals 133.2279 fl oz (UK). To convert, multiply the value in US gallons by 133.2279.
How do I convert 1 gal (US) to fl oz (UK)?
1 gal (US) = 133.228 fl oz (UK). For any value, multiply by 133.2279.
How do I convert fl oz (UK) back to gal (US)?
Divide by the same factor — or equivalently, multiply by 0.007505937. So 1 fl oz (UK) = 0.00750594 gal (US).
When would I need to convert US gallon to imperial fluid ounce?
Volume conversions are used for tank sizing, batch calculations, and bridging between vendor specs (gallons, barrels, ft³) and process documentation (m³, litres).
Is the conversion exact?
The factor shown is precise to at least 7 significant figures. For most process-engineering work this is far better than instrument accuracy. For metrology or trade applications, refer to the relevant national standard (NIST, BIPM, ISO 80000).