Milliliters to Fluid Ounces
Type a value in either box to convert between milliliters and fluid ounces. The factor is 0.033814.
| Milliliters | Fluid Ounces |
|---|---|
| 1 mL | 0.033814 fl oz |
| 2 mL | 0.067628 fl oz |
| 3 mL | 0.101442 fl oz |
| 5 mL | 0.16907 fl oz |
| 10 mL | 0.33814 fl oz |
| 25 mL | 0.845351 fl oz |
| 50 mL | 1.690701 fl oz |
| 100 mL | 3.381402 fl oz |
How to use
- Enter a value in the Milliliters field.
- The Fluid Ounces figure appears immediately — no button to press.
- Typing in the Fluid Ounces field converts back to Milliliters the same way.
- Use the reference table for the values that come up most often.
Milliliters to Fluid Ounces formula
Converting milliliters to fluid ounces is a single multiplication by 0.0338140227.
fl oz = mL × 0.0338140227
Why this factor: the milliliter and the fluid ounce are both defined against the liter, so dividing one definition by the other gives 0.0338140227 directly. Both definitions are set out in full below.
To go the other way, divide by 0.0338140227 — or use the Fluid Ounces to Milliliters converter, which is the same calculation reversed.
Worked example
Given 50 mL, multiplying by 0.0338140227 yields 1.690701 fl oz.
50 mL × 0.0338140227 = 1.690701 fl oz
The converter above does this for any value you type, in either direction.
What is a milliliter?
A milliliter is one thousandth of a liter, and is exactly the same volume as a cubic centimeter.
Definition: Exactly 0.001 liter, which is exactly 1 cm³.
Where it is used: Medicine doses, cosmetics, recipe quantities, and laboratory work.
Worth knowing: 1 mL = 1 cm³ = 1 cc exactly, so these three units are interchangeable.
What is a fluid ounce?
A US fluid ounce is a small liquid volume, one eighth of a cup.
Definition: Exactly one 128th of a US liquid gallon, so exactly 29.5735295625 milliliters.
Where it is used: Beverage cans and bottles, cosmetics, and small liquid quantities in the US.
Worth knowing: Measures volume, not weight — a fluid ounce of water weighs about 1.04 avoirdupois ounces. The imperial fluid ounce is 28.41 mL.
Milliliters vs Fluid Ounces
The milliliter is a metric unit while the fluid ounce is a US customary unit. That is why the factor between them is not a round number: the two systems were defined independently and only later tied together by exact agreement.
Frequently asked questions
How many fluid ounces are in a milliliter?
One milliliter equals 0.0338140227 fluid ounces.
What is the formula to convert milliliters to fluid ounces?
Multiply the number of milliliters by 0.0338140227. To reverse it, divide by 0.0338140227 instead.
How do I convert fluid ounces back to milliliters?
Divide by 0.0338140227, which is the same as multiplying by 29.5735296.
How many fluid ounces are in 10 milliliters?
10 mL works out to 0.33814 fl oz.
Is there anything to watch out for with milliliters?
1 mL = 1 cm³ = 1 cc exactly, so these three units are interchangeable.
How is the milliliter defined?
Exactly 0.001 liter, which is exactly 1 cm³.