Milliliters to Fluid Ounces
Convert mL to US fluid ounces instantly.
Fluid Ounces (fl oz)
8.4535
Quick reference
30 mL1.0144 fl oz
60 mL2.0288 fl oz
100 mL3.3814 fl oz
120 mL4.0577 fl oz
240 mL8.1154 fl oz
250 mL8.4535 fl oz
330 mL11.1586 fl oz
355 mL12.004 fl oz
500 mL16.907 fl oz
750 mL25.3605 fl oz
1000 mL33.814 fl oz
mL to fl oz conversion
One US fluid ounce equals exactly 29.5735296 milliliters, so to convert mL to fl oz divide by 29.5735296 (or multiply by ≈ 0.033814). Common reference: 30 mL ≈ 1 fl oz; 240 mL = 8 fl oz (1 cup); 355 mL = 12 fl oz (standard US can). Note: this uses US fluid ounces, not UK Imperial fluid ounces. Need the reverse? Fluid ounces to mL.
Built and maintained by Meet Shah · Last updated
What this tool is used for
- Converting a metric recipe quantity for measuring equipment marked in fluid ounces.
- Checking a bottle or container size against a limit quoted in ounces.
- Converting a dosage volume from a metric label for a US-marked syringe or cup.
- Comparing product sizes across markets where the labelling units differ.
- Working out a liquid allowance for travel where the rule is stated in ounces.
Frequently Asked Questions
- Which direction of rounding matters here?
- This one, more than the reverse. Millilitres are exact and fluid ounces are not, so converting 500 ml gives 16.907 US fl oz — an untidy number that gets rounded, and the rounding is where the error enters.
- What are the common bottle sizes in each system?
- A 330 ml can is 11.16 US fl oz, 500 ml is 16.9, and a 750 ml wine bottle is 25.4. None land on round ounce values, which is why US-market versions of the same product are often reformulated to 12 oz or 16.9 oz rather than converted.
- Is a millilitre the same as a cubic centimetre?
- Yes, exactly — 1 ml = 1 cm³ by definition, and a litre is exactly 1000 cm³. Medical contexts use cc and ml interchangeably for this reason, though ml is now preferred to avoid handwriting confusion.
- Why does the metric side have no ambiguity?
- Because the litre has a single definition worldwide, tied to the cubic metre. The fluid ounce does not — it has US customary, imperial and FDA labelling values, which is why the ambiguity lives entirely on the ounce side.
- How precise should the result be?
- One decimal place for cooking and drinks, two for anything dispensed or dosed. Quoting more implies a precision the source measurement rarely has, and quoting fewer can matter at small volumes.
Common errors and gotchas
- Confusing US and imperial fluid ounces, which differ by about 4% and both appear on packaging.
- Assuming a US cup is exactly eight fluid ounces of any liquid, which conflates volume with weight.
- Rounding a small dosage volume, where the absolute error matters more than the percentage.
- Mixing fluid ounces with ounces of weight, which are different quantities that share a name.
- Treating a nominal container size as its actual volume, which is usually a little larger.
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