Fluid Ounces to Milliliters
Convert US fluid ounces to mL instantly.
Milliliters (mL)
236.5882
Quick reference
1 fl oz29.5735 mL
2 fl oz59.1471 mL
4 fl oz118.2941 mL
6 fl oz177.4412 mL
8 fl oz236.5882 mL
10 fl oz295.7353 mL
12 fl oz354.8824 mL
16 fl oz473.1765 mL
20 fl oz591.4706 mL
32 fl oz946.3529 mL
64 fl oz1892.7059 mL
fl oz to mL conversion
One US fluid ounce equals exactly 29.5735296 milliliters. Common reference: 8 fl oz = 236.6 mL (1 cup); 12 fl oz = 354.9 mL (standard soda can); 16 fl oz = 473.2 mL (1 pint). Note: these are US fluid ounces, not UK Imperial fluid ounces. Need the reverse? mL to fluid ounces.
Built and maintained by Meet Shah · Last updated
What this tool is used for
- Converting a US recipe volume for metric measuring equipment.
- Reading an ounce-labelled bottle size against a metric limit.
- Converting a dosage volume from a US label for a metric syringe.
- Checking a product size against a metric specification.
- Converting a travel liquid allowance stated in ounces.
Frequently Asked Questions
- Which fluid ounce am I converting?
- This is the whole problem: the US fluid ounce is 29.5735 ml and the UK imperial one is 28.4131 ml — about 4% apart. A recipe that does not say which it means is genuinely ambiguous, and the error compounds across a large volume.
- Why are the two different at all?
- Because they were defined from different bases. The imperial gallon was fixed as the volume of ten pounds of water; the US retained the older wine gallon of 231 cubic inches. The ounces inherited that split and never reconciled.
- What about the US nutrition-labelling ounce?
- A third value — exactly 30 ml, defined by the FDA for label legibility. So a bottle marked 8 fl oz may contain 236.6 ml by the customary measure or 240 ml by the labelling one.
- How many ounces are in a pint?
- 16 in the US and 20 in the UK, which is why a US pint (473 ml) is noticeably smaller than an imperial one (568 ml). Converting pints with the wrong ounce count compounds both errors at once.
- Which should I use for cooking?
- Match the recipe's origin — US recipes use US ounces. Better still, weigh: professional and most modern recipes give grams precisely because volume measures of ounces, cups and spoons are inconsistent between countries.
- Which fluid ounce is being converted?
- The US fluid ounce is 29.5735 ml and the imperial one is 28.4131 — about a 4% difference. Recipes rarely say which, which is why an imperial pint is 20 fl oz and a US pint is 16.
Common errors and gotchas
- Assuming US and imperial fluid ounces are the same. They differ by about 4% and both appear on labels.
- Confusing fluid ounces with ounces of weight, which are different quantities sharing a name.
- Treating a US cup as exactly 240 mL when it is closer to 237.
- Rounding a small dose, where the absolute error matters more than the percentage.
- Reading a nominal pack size as the exact fill volume.
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