Fluid Ounces to Milliliters Converter
Enter a volume, pick a direction and get the result in US fluid ounces or millilitres.
This result is an estimate only. Double-check important figures before relying on them.
How it is calculated
- US fluid ounces to millilitres: multiply by 29.5735295625
- Millilitres to US fluid ounces: divide by 29.5735295625
- 1 US cup = 8 US fluid ounces
For cooking measures, see the cups to milliliters converter.
Worked example
- 8 US fl oz × 29.5735 = 236.59 ml, the size of a US cup
- 250 ml ÷ 29.5735 = 8.4535 US fl oz
Why your number may differ
US and UK fluid ounces differ, and so do the pints and cups built from them. This converter uses the US fluid ounce.
Frequently asked questions
How many ml are in a fluid ounce?
One US fluid ounce is 29.5735295625 ml. A UK (imperial) fluid ounce is slightly smaller, at 28.4131 ml.
How many ounces is 250 ml?
About 8.45 US fluid ounces.
Is a fluid ounce the same as an ounce of weight?
No. A fluid ounce measures volume. An ounce measures weight. For water they are close, but not for other liquids.