Oz to mL Calculator
Convert fluid ounces to millilitres, or millilitres to fluid ounces, in an instant. Choose between US and UK fluid ounce standards for an accurate conversion every time.
Volume Conversion
Enter a volume and choose your conversion direction and standard
US recipes typically use US fl oz; UK, Australian, and imperial recipes use UK fl oz.
Enter a volume in fluid ounces to convert it into millilitres.
Your Conversion Result
Converted volume and unit breakdown
Enter a volume above and click Convert Volume to instantly see your result in the other unit.
Common Oz to mL Conversions
A quick-glance table of commonly searched fluid ounce to millilitre conversions, useful for cooking, baking, and everyday kitchen measurements.
| Fluid Ounces | US mL | UK mL | Common Use |
|---|---|---|---|
| 1 fl oz | 29.57 mL | 28.41 mL | Shot / small measure |
| 2 fl oz | 59.15 mL | 56.83 mL | Espresso double shot |
| 4 fl oz | 118.29 mL | 113.65 mL | Half cup |
| 8 fl oz | 236.59 mL | 227.30 mL | 1 US cup |
| 16 fl oz | 473.18 mL | 454.61 mL | 1 US pint |
| 33.8 fl oz | 1000 mL | 960.76 mL | 1 litre bottle |
Oz to mL FAQ
Everything you need to know about converting between fluid ounces and millilitres, including the difference between US and UK measures.
To convert US fluid ounces to millilitres, multiply by 29.5735. To convert UK (imperial) fluid ounces to millilitres, multiply by 28.4131. The two systems use slightly different definitions, so it is important to choose the correct one for your region.
A US fluid ounce equals approximately 29.5735 millilitres, while a UK (imperial) fluid ounce equals approximately 28.4131 millilitres. This means a US fluid ounce is slightly larger than a UK fluid ounce, even though both share the same name.
8 US fluid ounces equals approximately 236.6 millilitres, while 8 UK fluid ounces equals approximately 227.3 millilitres. 8 US fluid ounces is also commonly referred to as one US cup.
To convert millilitres to US fluid ounces, divide the millilitre value by 29.5735. To convert to UK fluid ounces, divide by 28.4131. Always confirm which fluid ounce standard a recipe or label is using before converting.
No. A fluid ounce measures volume, while a standard (avoirdupois) ounce measures weight or mass. They are only roughly equivalent for water at room temperature, where 1 fluid ounce of water weighs approximately 1 ounce, but this relationship does not hold for other liquids.
Recipes from the United States typically use the US fluid ounce, while recipes from the United Kingdom, Australia, and other countries using imperial measures typically use the UK fluid ounce. Since these two units differ slightly in size, the same number of ounces converts to a different millilitre figure depending on the source.