Millilitres to fluid ounces matters for drinks, cosmetics, medicine cups and recipes. U.S. and UK fluid ounces differ by about 4%: 1 US fl oz = 29.5735 mL, 1 UK fl oz = 28.4131 mL.
How to use the mL to oz Converter
- Type the number of millilitres into the Millilitres field. Decimals such as 50 are fine.
- Read the answer in US fluid ounces – it updates as you type, with no button to press.
- To convert the other way, type into US fluid ounces and the millilitres are recalculated.
- Press Copy results to copy both values with the page title, or Copy link to share this exact conversion.
This page converts only mL ⇄ US fl oz. Need a different unit? Use the general volume converter, where you can choose any “from” and “to” unit.
How it works
Both units measure volume, so they are always in the same ratio: one millilitre equals 0.033814023 US fluid ounces. The calculator multiplies the number of millilitres you type by 0.033814023 to give US fluid ounces, and when you type into the US fluid ounces field it divides by the same factor to give millilitres. Because the ratio never changes, doubling the millilitres always doubles the US fluid ounces. Results are calculated at full precision and rounded only for display (up to eight decimal places, with very large or small values shown in scientific notation).
How to convert millilitres to US fluid ounces
- Write down the value in millilitres, for example 100 mL.
- Multiply by the conversion factor 0.033814023 (because 1 millilitre = 0.033814023 US fl oz).
- 100 × 0.033814023 = 3.3814023 US fl oz.
- To go back from US fluid ounces to millilitres, divide by 0.033814023 – or multiply by 29.57353.
mL to US fl oz conversion table
| Millilitres | US fluid ounces | US fluid ounces | Millilitres |
|---|---|---|---|
| 5 mL | 0.16907011 US fl oz | 1 US fl oz | 29.57353 mL |
| 10 mL | 0.33814023 US fl oz | 2 US fl oz | 59.147059 mL |
| 30 mL | 1.0144207 US fl oz | 5 US fl oz | 147.86765 mL |
| 50 mL | 1.6907011 US fl oz | 10 US fl oz | 295.7353 mL |
| 100 mL | 3.3814023 US fl oz | 20 US fl oz | 591.47059 mL |
| 120 mL | 4.0576827 US fl oz | 50 US fl oz | 1,478.6765 mL |
| 200 mL | 6.7628045 US fl oz | 100 US fl oz | 2,957.353 mL |
| 250 mL | 8.4535057 US fl oz | 1,000 US fl oz | 29,573.53 mL |
| 355 mL | 12.003978 US fl oz | ||
| 473 mL | 15.994033 US fl oz | ||
| 750 mL | 25.360517 US fl oz | ||
| 1,000 mL | 33.814023 US fl oz |
What is a millilitre?
A millilitre is one thousandth of a litre and exactly one cubic centimetre. Medicines, cosmetics, drinks and kitchen measures are labelled in mL.
What is a US fluid ounce?
The U.S. fluid ounce is 1/128 of a U.S. gallon, about 29.57 mL. It is a unit of volume: a fluid ounce of water weighs about one ounce, but other liquids do not.
Quick mental conversion
For a fast estimate, multiply millilitres by about 0.034 to get US fluid ounces; the error is about 0.6%. Use the calculator above when you need the exact figure.
Common mistakes to avoid
Mixing u.s. and uk gallons, pints and fluid ounces, assuming a cup is always 250 ml, and treating volume and weight as interchangeable for anything except water.
Formula
1 mL = 0.033814023 US fl oz1 US fl oz = 29.57353 mLUS fl oz = mL × 0.033814023Worked example
Inputs — Millilitres: 100 mL.
Results — US fluid ounces = 3.38140227 US fl oz.
Frequently asked questions
How many oz is 500 mL?
About 16.9 US fl oz.
Is a fluid ounce a weight?
No, it measures volume; an ounce of weight is different.
How many US fluid ounces are in one millilitre?
1 mL = 0.033814023 US fl oz.
How many millilitres are in one US fluid ounce?
1 US fl oz = 29.57353 mL.
How do I convert millilitres to US fluid ounces?
Multiply the number of millilitres by 0.033814023. For example, 100 mL × 0.033814023 = 3.3814023 US fl oz.
How do I convert US fluid ounces back to millilitres?
Divide by 0.033814023 (or multiply by 29.57353), or simply type the value into the US fluid ounces field above.
What is 10 mL in US fluid ounces?
10 mL = 0.33814023 US fl oz.
What is 5 mL in US fluid ounces?
5 mL = 0.16907011 US fl oz.
Is this conversion exact?
Yes. The factor comes from the official definitions of both units (NIST and the SI), so the only difference you may see is rounding in the last displayed digit.
Can I convert to other units on this page?
This page converts only between millilitres and US fluid ounces. To pick any volume unit, use the general volume converter linked under Related calculators.
What formula does the mL to oz Converter use?
1 mL = 0.033814023 US fl oz.