To convert fluid ounces to milliliters, multiply by 29.5735. So 1 fl oz = 29.57 ml, 8 fl oz = 236.6 ml (1 cup), and 16 fl oz = 473.2 ml (1 pint). This converter uses US fluid ounces throughout.
- Formula: ml = fl oz × 29.5735. Quick mental anchor: 1 fl oz is about 30 ml.
- 8 fl oz = 236.6 ml (1 US cup). 12 fl oz = 355 ml (standard US can). 16 fl oz = 473 ml (1 US pint).
- US fl oz (29.5735 ml) differs from UK fl oz (28.4131 ml) - a ~4% difference.
- Reverse: fl oz = ml × 0.033814.
How to use our fl oz to ml converter
Type any fl oz value in the fl oz field and the ml result appears instantly. You can also type in the ml field to convert back to fl oz - both directions work without pressing a button.
How do you convert fluid ounces to milliliters?
Multiply the number of US fluid ounces by 29.5735. This is the exact conversion factor defined by the US customary system: 1 US fl oz = 29.5735295625 ml (rounded to 29.5735 for practical use).
$$\text{ml} = \text{fl oz} \times 29.5735$$
Worked examples: 1 fl oz = 29.57 ml. 2 fl oz = 59.15 ml. 4 fl oz = 118.3 ml. 8 fl oz = 236.6 ml. 12 fl oz = 354.9 ml. 16 fl oz = 473.2 ml. 32 fl oz = 946.4 ml.
How do you convert ml to fl oz?
Multiply milliliters by 0.033814. See the dedicated ml to fl oz converter for a ml-first reference table.
$$\text{fl oz} = \text{ml} \times 0.033814$$
Worked examples: 100 ml = 3.38 fl oz. 250 ml = 8.45 fl oz. 500 ml = 16.91 fl oz. 1,000 ml = 33.81 fl oz.
Fluid ounces to milliliters reference table
Standard US fl oz values converted to ml, with beverage and cooking context:
| Fluid Ounces (fl oz) | Milliliters (ml) | Context |
|---|---|---|
| 1 fl oz | 29.57 ml | Shot glass (US) |
| 2 fl oz | 59.15 ml | Double shot |
| 4 fl oz | 118.3 ml | Half cup |
| 6 fl oz | 177.4 ml | Small glass / 3/4 cup |
| 8 fl oz | 236.6 ml | 1 cup |
| 12 fl oz | 354.9 ml | Standard US can |
| 16 fl oz | 473.2 ml | 1 pint / large cup |
| 20 fl oz | 591.5 ml | Large fountain drink |
| 24 fl oz | 710.6 ml | Large water bottle |
| 32 fl oz | 946.4 ml | Quart / large Nalgene |
| 64 fl oz | 1,892.7 ml | Half gallon |
| 128 fl oz | 3,785.4 ml | 1 gallon |
US vs UK fluid ounces - which one is used here?
This converter uses US fluid ounces. The two systems differ by about 4% - small but meaningful in precise recipes.
| System | 1 fl oz in ml | 8 fl oz in ml | When you see it |
|---|---|---|---|
| US fluid ounce | 29.5735 ml | 236.6 ml | US recipes, US product labels |
| UK fluid ounce | 28.4131 ml | 227.3 ml | UK recipes, British product labels |
If you're working with UK measurements, the difference adds up in a full recipe. 8 UK fl oz = 227.3 ml vs 8 US fl oz = 236.6 ml - nearly 10 ml difference per cup.
FAQs about US fluid ounce, UK fluid ounce, and milliliter
How many ml is 1 fl oz?
1 US fluid ounce equals 29.5735 ml. The UK fl oz is slightly larger at 28.4131 ml. Unless you're using a UK recipe or UK product, 1 fl oz = 29.57 ml is the right conversion to use.
How many ml is 8 fl oz?
8 US fluid ounces equals 236.6 ml. 8 × 29.5735 = 236.6 ml. This is 1 US cup - a standard measuring cup holds 8 fl oz or 236.6 ml.
How many ml is 16 fl oz?
16 US fluid ounces equals 473.2 ml. 16 × 29.5735 = 473.2 ml. This is 1 US pint and a common large beverage cup size.
How many ml is 12 fl oz?
12 US fluid ounces equals 354.9 ml. 12 × 29.5735 = 354.9 ml. Standard US cans of soda and beer are 12 fl oz (355 ml, rounded).