ml to oz converter
ml to oz converter. Convert milliliters to US fluid ounces with the exact factor, a 20-row table, and the pitfalls that change the result. US fl oz = milliliters ÷ 29.5735295625.
1 mL = 0.0338140227018 fl oz. Full precision: 0.338140227018 fl oz.
How to convert milliliters to us fluid ounces
Millilitres on this page convert to US fluid ounces. One US fluid ounce is exactly 1/128 of a US gallon, and the gallon is 3.785411784 litres, so a fluid ounce is 29.5735295625 millilitres. Divide millilitres by that number. Thirty millilitres is 1.014 US fl oz, which is why medicine cups treat 30 mL as one fluid ounce and are slightly generous. A UK fluid ounce is 28.4130625 mL, one twentieth of an imperial pint. This page is not that ounce, and it is not the 28.35 g weight ounce.
Bottles, recipes, and cosmetics that switch between mL and fl oz on the same label. A 750 mL bottle of wine is 25.361 US fl oz. A US cup is 8 fl oz, 236.588 mL. If your recipe says ounces of flour, you are in the wrong page. That is mass.
Exact formula
FormulaUS fl oz = milliliters ÷ 29.5735295625US fl oz = milliliters ÷ 29.5735295625 One mL is 0.0338140227018 fl oz. Ten mL is 0.338140227018 fl oz. The worked example below uses that same conversion.
Conversion table
The milliliters column runs from 1 mL (0.0338 fl oz) through 1000 mL (33.814 fl oz).
| Milliliters | US fluid ounces |
|---|---|
| 1 | 0.0338 |
| 5 | 0.1691 |
| 10 | 0.3381 |
| 15 | 0.5072 |
| 20 | 0.6763 |
| 25 | 0.8454 |
| 29.57 | 0.9999 |
| 30 | 1.014 |
| 50 | 1.691 |
| 60 | 2.029 |
| 75 | 2.536 |
| 100 | 3.381 |
| 118 | 3.99 |
| 150 | 5.072 |
| 200 | 6.763 |
| 237 | 8.014 |
| 250 | 8.454 |
| 300 | 10.144 |
| 500 | 16.907 |
| 1000 | 33.814 |
Worked example: Milliliters to US fluid ounces
A medicine cup marked 30 mL is 1.014 fl oz of a US fluid ounce. The defined US fluid ounce is 29.5735295625 mL, a US gallon divided by 128, so 30 mL is slightly more than one ounce. A 750 mL wine bottle is 25.361 fl oz. One hundred millilitres is 3.381 fl oz. A UK fluid ounce is 28.4130625 mL and is not this result. A weight ounce is 28.349523125 g. Recipes that say 'ounces of flour' are on the grams page, because flour is mass.
Pitfalls for milliliters to us fluid ounces
- US and UK fluid ounces differ. 1 UK fl oz = 28.4130625 mL. Using the US factor on a UK recipe is about 4 percent high.
- Weight ounces are 28.349523125 g. A fluid ounce of water is close to that and is still a different unit.
- Nutrition labels in the US often pair mL with fl oz using the 29.5735 factor. A rounded 30 mL label is a serving size, not the definition.
- Density matters for any other liquid if you arrived here from grams. Convert volume only.
Frequently asked questions
How many fluid ounces in 100 ml?
3.381 US fl oz. Divide by 29.5735295625.
Is 30 ml one ounce?
It is 1.014 US fl oz. Labels often call 30 mL a fluid ounce. The defined ounce is 29.5735 mL.
Which ounce is this?
The US fluid ounce. Not the UK fluid ounce and not the avoirdupois weight ounce.
How is the factor derived?
US gallon ÷ 128. 3.785411784 L / 128 = 0.0295735295625 L = 29.5735295625 mL.