Milliliters to Fluid Ounces
Convert milliliters to fluid ounces instantly, or swap to convert ounces to milliliters, in US or UK units.
Results are provided as is, for general information. Check anything important before relying on it. See the Terms of Use.
About this tool
Convert milliliters (mL) to fluid ounces (fl oz), or fluid ounces to milliliters, for drinks, recipes, baby bottles, medicine doses, cosmetics and product labels. One US fluid ounce is exactly 29.5735295625 milliliters, so divide milliliters by 29.5735 to get US fluid ounces, or swap direction to multiply ounces by 29.5735. The UK (imperial) fluid ounce is smaller, at exactly 28.4130625 milliliters, and its result is shown alongside; use the ounce type selector to make the UK ounce the main result. Choose automatic precision or 0, 2, 4 or 6 decimal places. A chart below lists common bottle and can sizes in both systems. Fluid ounces measure volume, not weight.
How it works
US fluid ounces = milliliters ÷ 29.5735295625 milliliters = US fluid ounces × 29.5735295625 UK fluid ounces = milliliters ÷ 28.4130625
A US fluid ounce is exactly 29.5735295625 milliliters and a UK (imperial) fluid ounce is exactly 28.4130625 milliliters. The converter keeps the exact factors and rounds only the displayed answer.
| Question | Working | Answer |
|---|---|---|
| 500 mL in US fluid ounces | 500 ÷ 29.5735295625 | 16.907 fl oz |
| 100 mL in US fluid ounces | 100 ÷ 29.5735295625 | 3.3814 fl oz |
| 500 mL in UK fluid ounces | 500 ÷ 28.4130625 | 17.5975 imp fl oz |
| 8 US fl oz in mL | 8 × 29.5735295625 | 236.588 mL |
When to use it
Questions
How do I convert mL to oz?
Divide milliliters by 29.5735 to get US fluid ounces. For example, 500 mL is approximately 16.907 fl oz and 100 mL is approximately 3.3814 fl oz. Multiplying by about 0.033814 gives the same result.
How many mL are in an ounce?
One US fluid ounce is 29.5735 mL (exactly 29.5735295625). One UK (imperial) fluid ounce is 28.4131 mL (exactly 28.4130625). A US fluid ounce is about 4% larger than a UK one.
How do I convert oz to mL?
Multiply fluid ounces by 29.5735. For example, 8 US fl oz is approximately 236.588 mL and 12 US fl oz is approximately 354.882 mL. Use Swap, then enter ounces to convert in this direction.
Are US and UK fluid ounces the same?
No. A US fluid ounce is about 29.57 mL and a UK (imperial) fluid ounce is about 28.41 mL. This converter shows both, and the ounce type selector chooses which one is used when you swap to convert ounces to milliliters.
Is a fluid ounce the same as an ounce of weight?
No. A fluid ounce measures volume and an ounce measures weight. One fluid ounce of water weighs close to one ounce, but other liquids such as oil or honey do not. This tool converts volume only.
How many ounces is a 500 mL bottle?
A 500 mL bottle holds approximately 16.907 US fluid ounces, or approximately 17.5975 UK fluid ounces.