Example 1
- Direction: US fl oz to ml
- 1 fl oz
29.5735 ml
How many ml is 1 US fl oz? 29.5735 ml.
Fl oz to ml
The calculator converts US fluid ounces to millilitres. One US fl oz is 29.5735 ml. Eight fl oz is 236.5882 ml, not a round 250. This is not a mass ounce and not a UK ounce.
The other page, ml to fl oz, is on ml to fl oz. A cup: cups to ounces.
Result
Enter a volume in US fluid ounces or in millilitres. The result will appear here.
How it works
The calculator multiplies US fluid ounces by 29.5735295625. 1 fl oz is 29.5735 ml. 8 fl oz is 236.5882 ml. 16 fl oz is 473.1765 ml.
The other way, you divide millilitres by 29.5735295625. 250 ml is 8.4535 fl oz, not a round 8.
This is 1/128 of a US gallon. A UK ounce is about 28.41 ml and is not used here. A mass ounce, 28.35 g, is on the grams page.
A US cup, 8 fl oz, belongs on cups to ounces. This page uses fl oz and ml.
You may enter zero; the result is then also zero. The calculator does not accept negative numbers.
A comma and a period give the same fraction.
Formula
ml = fl oz × 29.5735295625; fl oz = ml / 29.5735295625
A US fluid ounce is 1/128 of a US gallon, 29.5735295625 ml.
How to use
- Choose US fl oz to millilitres.
- Enter 1. The result is 29.5735 ml.
- Enter 8. The result is 236.5882 ml.
- The other way, enter 250. The result is 8.4535 fl oz.
1 US fl oz is 29.5735 ml
A US fluid ounce is 29.5735 ml. 8 fl oz is 236.5882 ml.
- fl oz
- US fluid ounce. 1 fl oz = 29.5735 ml. This is not a UK ounce and not a mass ounce.
- ml
- Millilitre. 8 fl oz = 236.5882 ml, not 250.
- 29.5735
- 1 US fl oz at four decimal places. The exact factor is 29.5735295625.
Examples
Example 2
- Direction: US fl oz to ml
- 8 fl oz
236.5882 ml
How many ml is 8 US fl oz? 236.5882 ml, not 250.
Example 3
- Direction: US fl oz to ml
- 16 fl oz
473.1765 ml
How many ml is 16 US fl oz? 473.1765 ml.
Related calculators
Frequently asked questions
How many ml is 1 US fl oz?
29.5735 ml at four decimal places. The exact factor is 29.5735295625.
How many ml is 8 fl oz?
236.5882 ml. That is not 250 ml and not a 250 ml kitchen glass.
How many ml is 16 fl oz?
473.1765 ml.
Is this a UK ounce?
No. A UK ounce is about 28.41 ml. This page uses the US ounce.
Is this a mass ounce?
No. A mass ounce, 28.35 g, is on the grams and ounces page.
Is 250 ml 8 fl oz?
No. 250 ml is 8.4535 fl oz. 8 fl oz is 236.5882 ml.
Can volume be negative?
No. Zero is allowed; after conversion the result is still zero.
Where is the US cup?
On the cups to ounces page. This page uses fl oz and ml.
Does a comma work?
Yes. 1.5 fl oz is the same fraction as 1,5.
Where do I convert ml to fl oz?
On the ml to fl oz page. That page starts from ml.
Sources
A US fluid ounce is 29.5735295625 ml.
Page updated in 2026.