Unit converter
Milliliters to US Fluid Ounces Converter
Convert millilitres into US fluid ounces with this tool. A US fluid ounce is defined as exactly 29.5735295625 millilitres, so one millilitre is about 0.033814 US fluid ounces. The pairing comes in useful for reading a drink or bottle size against a US recipe, dosing liquid medicine where instructions are given in fluid ounces, comparing cosmetics and travel toiletries labelled in millilitres against US fl oz, and following American cocktail or baking measures. Put in a millilitre value and the US fluid ounce figure shows at once, with a table of common sizes.
1 milliliter = 0.033814 US fluid ounces
Common milliliters to US fluid ounces values
| Milliliters | US fluid ounces |
|---|---|
| 1 ml | 0.033814 fl oz |
| 2 ml | 0.067628 fl oz |
| 5 ml | 0.16907 fl oz |
| 10 ml | 0.33814 fl oz |
| 20 ml | 0.67628 fl oz |
| 50 ml | 1.6907 fl oz |
| 100 ml | 3.3814 fl oz |
How to convert
- Take the volume in millilitres.
- Divide by 29.5735295625 to get US fluid ounces, the exact millilitres in one US fl oz.
- Dividing by that number is the same as multiplying by about 0.033814.
- To go back, multiply a US fluid ounce figure by 29.5735295625 to return to millilitres.
- For a mental check, roughly 30 ml is one US fluid ounce, so divide the millilitres by about 30.
US fluid ounces = millilitres / 29.5735295625
The US fluid ounce is one sixteenth of a US pint and equals exactly 29.5735295625 millilitres. Dividing a millilitre figure by this constant gives US fluid ounces; multiplying US fluid ounces by it returns millilitres. The millilitre value is exact, while the reciprocal 0.033814 is rounded.
- ml
- the volume in millilitres you start with
- 29.5735295625
- millilitres in one US fluid ounce, by definition
Worked example
A 330 ml can of drink is 330 divided by 29.5735295625, which is about 11.16 US fluid ounces. A 500 ml bottle works out at roughly 16.91 US fl oz, a little over a US pint.
Key facts
- One US fluid ounce is exactly 29.5735295625 ml; one millilitre is about 0.033814 US fl oz.
- Roughly 30 ml makes one US fluid ounce.
- A 355 ml can is close to 12 US fluid ounces, the standard US soft-drink size.
- The US fluid ounce is slightly larger than the imperial fluid ounce.
Tips
- Treat 30 ml as a working stand-in for one US fluid ounce when speed matters more than precision.
- For US recipes, convert each fluid ounce measure to millilitres on a single pass so a metric jug can be used throughout.
Frequently asked questions
How many US fluid ounces in 1 ml?+
About 0.033814 US fluid ounces, near a thirtieth.
How many millilitres are in a US fluid ounce?+
Exactly 29.5735295625 millilitres, often rounded to 29.57 ml.
Is a US fluid ounce the same as a UK fluid ounce?+
No. The imperial fluid ounce is about 28.41 ml, slightly smaller, so US and UK fluid ounce figures do not match. This tool uses the US fluid ounce.
How many millilitres is a US cup or pint?+
A US cup is 8 US fl oz, about 236.6 ml, and a US pint is 16 US fl oz, close to 473 ml.
Things to watch
- Do not swap US and imperial fluid ounces; the gap is small per ounce but adds up over a full recipe.
- A fluid ounce measures volume, not weight, so a liquid 500 ml is not the same as 500 grams unless it happens to be water.
Sources
Last updated: 2026-01-01
Conversions use internationally defined factors. Provided for general use; verify critical measurements independently.