US fluid ounces to Imperial fluid ounces
Convert us fluid ounces to imperial fluid ounces (US fl oz to imp fl oz). 1 US fl oz = 1.04084273079 imp fl oz. Use the calculator, formula and conversion table.
How to convert us fluid ounces to imperial fluid ounces
Multiply the amount in us fluid ounces by 1.04084273079 to get imperial fluid ounces. The displayed factor and results are rounded to 12 significant digits.
imp fl oz = US fl oz × 1.04084273079Worked example
1 US fl oz = 1.04084273079 imp fl oz. Change the amount in the calculator above to use your own value.
Units and assumptions
Units are labelled explicitly: US customary liquid cups and gallons differ from imperial units. One litre is 1,000 millilitres. This converts volume only; mass conversions need a density.
Calculator results use floating-point arithmetic and are rounded for display. The reference table below uses up to 12 significant digits.
US fluid ounces to Imperial fluid ounces table
| US fluid ounces (US fl oz) | Imperial fluid ounces (imp fl oz) |
|---|---|
| 0 | 0 |
| 1 | 1.04084273079 |
| 5 | 5.20421365393 |
| 10 | 10.4084273079 |
| 25 | 26.0210682697 |
| 100 | 104.084273079 |
| 1,000 | 1,040.84273079 |
About this conversion
What is the formula for us fluid ounces to imperial fluid ounces?
imp fl oz = US fl oz × 1.04084273079. Multiply the amount in us fluid ounces by 1.04084273079 to get imperial fluid ounces. The displayed factor and results are rounded to 12 significant digits.
How do I convert back to us fluid ounces?
Use the imperial fluid ounces to us fluid ounces calculator to reverse this conversion. You can also use Swap units in the calculator above.
Can I use a different pair of units?
Choose another unit in the calculator, or open the volume converter to browse all supported pairs.