How many UK fluid ounces are in 1 US fluid ounce?

1 US fluid ounce equals 1.04084 UK fl oz.

How many UK fluid ounces are in 10 US fluid ounces?

10 US fl oz equals 10.4084 UK fl oz.

Use the reverse converter: 1 UK fluid ounce equals 0.96076 US fl oz.

Yes. It uses the exact SI/NIST definitions of each unit and shows up to 6 significant digits.

To convert US fluid ounces to UK fluid ounces, multiply the value by 1.04084273.

UK fl oz = US fl oz × 1.04084273

64 US fl oz × 1.04084273 = 66.61 UK fl oz

Note: "cup" here means the US cup (about 236.6 mL). Metric cups (250 mL), imperial cups and US/UK fluid ounces are listed as separate units.

US Fluid Ounce (US fl oz): A US liquid measure of about 29.5735 mL, one sixteenth of a US pint.
UK Fluid Ounce (UK fl oz): The imperial fluid ounce of exactly 28.4130625 mL, one twentieth of an imperial pint.

How do I convert US fluid ounces to UK fluid ounces?: To convert US fluid ounces to UK fluid ounces, multiply the value by 1.04084273.
How many UK fluid ounces are in 1 US fluid ounce?: 1 US fluid ounce equals 1.04084 UK fl oz.
How many UK fluid ounces are in 10 US fluid ounces?: 10 US fl oz equals 10.4084 UK fl oz.
How do I convert UK fluid ounces back to US fluid ounces?: Use the reverse converter: 1 UK fluid ounce equals 0.96076 US fl oz.
Is this converter accurate?: Yes. It uses the exact SI/NIST definitions of each unit and shows up to 6 significant digits.