Volume
fl oz (US)tofl oz (UK)
Convert US fluid ounces (fl oz (US)) to imperial fluid ounces (fl oz (UK)).
Factor1 fl oz (US) = 1.040843 fl oz (UK)
Converter
fl oz (US)
Accepts numbers or expressions, e.g. 150 + 14.7
Result
fl oz (UK)
Rendered to 6 significant figures.
Formula
Formula
fl oz (UK) = fl oz (US) × 1.040843
Multiply any value in US fluid ounces by 1.040843 to obtain the value in imperial fluid ounces.
Worked example
Convert 100 fl oz (US) to fl oz (UK).
- 01Start with 100 fl oz (US).
- 02Multiply by the conversion factor: 100 × 1.040843 = 104.084 fl oz (UK).
Result100 fl oz (US) = 104.084 fl oz (UK)
Conversion table
| fl oz (US) | fl oz (UK) |
|---|---|
| 1 | 1.0408 |
| 2 | 2.0817 |
| 5 | 5.2042 |
| 10 | 10.408 |
| 20 | 20.817 |
| 50 | 52.042 |
| 100 | 104.08 |
| 200 | 208.17 |
| 500 | 520.42 |
| 1000 | 1040.8 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from fl oz (US) to fl oz (UK)?
1 fl oz (US) equals 1.040843 fl oz (UK). To convert, multiply the value in US fluid ounces by 1.040843.
How do I convert 1 fl oz (US) to fl oz (UK)?
1 fl oz (US) = 1.04084 fl oz (UK). For any value, multiply by 1.040843.
How do I convert fl oz (UK) back to fl oz (US)?
Divide by the same factor — or equivalently, multiply by 0.9607599. So 1 fl oz (UK) = 0.96076 fl oz (US).
When would I need to convert US fluid ounce 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).