Convert US fluid ounce to imperial fluid ounce

Here you can quickly calculate how many imperial fluid ounce fit in one US fluid ounce.

write a number and we convert instantly

swap direction → km³

- scroll: formula · table · questions -

Example: US fluid ounce to imperial fluid ounce

Starting value Increment Accuracy

To convert US fluid ounce to imperial fluid ounce, multiply by 1.040843.

1 fl oz = 1.040843 fl oz (uk)

Example: 1 US fluid ounce = 1.040843 Imperial fluid ounce

A fluid ounce measures volume, not weight. The US fl oz is about 29.57 ml and the imperial fl oz about 28.41 ml, and neither matches the weight ounce (28.35 g) except roughly for water. Measure liquids in milliliters to avoid the ambiguity.

Score: 0

20.3 imperial fluid ounce equals 21.5 US fluid ounce.

Correct answer: 20.3 imperial fluid ounce = 19.5 US fluid ounce.

78 imperial fluid ounce equals 67.4 US fluid ounce.

Correct answer: 78 imperial fluid ounce = 74.9 US fluid ounce.

17.9 imperial fluid ounce equals 15.5 US fluid ounce.

Correct answer: 17.9 imperial fluid ounce = 17.2 US fluid ounce.