Units of Measure
Cooking Measurements
Volume

# How many milliliters are in one ounce?

###### July 29, 2016 5:25PM

The US food labelling fluid ounce has 30 mL. Ounce is not a SI unit.

###### July 29, 2016 5:33AM

How many ml in 1 oz? The answer is 29.5735296875 ml/ fl. oz.(US)

For imperial measure there is 28.35 ml in a fluid ounce.

###### July 11, 2016 5:54PM

None, since there can be no conversion. An ounce is a measure of mass. A millilitre is a measure of volume. The two measure different things and, according to basic principles of dimensional analysis, conversion from one to the other is not valid.

###### July 11, 2016 4:10PM

Assuming that you mean millilitres and not militers, the answer is that there can be no conversion.
An ounce is a measure of mass. A millilitre is a measure of volume. The two measure different things and, according to basic principles of dimensional analysis, conversion from one to the other is not valid. Consider an ounce of air. How many millilitres? Next consider the same mass of lead. How many millilitres?