Milliliter is 0.001 liter units.
Milliliters to Fluid ounces Converter — mL to fl oz
Convert Milliliter (mL) to Fluid ounce (fl oz) using the exact conversion factor (1 milliliter = 0.0338140227 fluid ounce). See the formula, worked examples, conversion table, unit comparison, history, and common uses.
Milliliters to Fluid ounces converter
Converter
Cooking Converter
Convert cooking volume and mass units used in recipes and nutrition workflows.
Context values
Some unit families need one extra value for a physically accurate result.
A US fluid ounce is 1/128 of a US gallon.
Result = input x 1e-6 / 2.95735296e-5.
Volume units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Milliliters to Fluid ounces
Milliliter and Fluid ounce both show up in recipes, and converting between them matters whenever a recipe from one country's cookbook needs to be followed with another country's measuring tools. Milliliter is typically associated with standard small-volume unit worldwide, while Fluid ounce is typically associated with united States (beverage, nutrition labeling).
Formula
fluid ounces = milliliters × 0.0338140227018
This factor comes from each unit's defined relationship to the category's base unit: 1 milliliter equals 0.000001 base units, and 1 fluid ounce equals 0.0000295735295625 base units, so dividing one by the other gives the direct milliliter-to-fluid ounce factor of 0.0338140227018.
Simple example
1 mL × 0.0338140227 = 0.0338140227 fl oz
1 milliliter = 0.0338140227 fluid ounces.
Real-world example
2 mL × 0.0338140227 = 0.0676280454 fl oz
2 milliliters = 0.0676280454 fluid ounces.
Conversion table
| Milliliter (mL) | Fluid ounce (fl oz) |
|---|---|
| 0.25 mL | 0.0084535057 fl oz |
| 0.5 mL | 0.0169070114 fl oz |
| 1 mL | 0.0338140227 fl oz |
| 2 mL | 0.0676280454 fl oz |
| 4 mL | 0.1352560908 fl oz |
| 8 mL | 0.2705121816 fl oz |
Reverse conversion: Fluid ounce to Milliliter
0.0338140227 fl oz × 29.57352956 = 0.9999999999 mL
0.0338140227 fluid ounces = 0.9999999999 milliliters.
milliliters = fluid ounces × 29.5735295625
For a page dedicated to this direction, see Fluid ounce to Milliliter.
Milliliter vs. Fluid ounce
| Aspect | Milliliter | Fluid ounce |
|---|---|---|
| Family | SI derived (metric prefix) unit | US customary unit |
| Typical use | Medicine dosing (worldwide, including in the US) | US beverage container sizing (soda, water bottles) |
| Where it's used | Standard small-volume unit worldwide | United States (beverage, nutrition labeling) |
Understanding the Milliliter
Milliliter (mL) measures volume. A milliliter is one-thousandth of a liter, equal to one cubic centimeter. It is classified as a SI derived (metric prefix) unit.
Where it's used: Standard small-volume unit worldwide
Uses of the Milliliter today
- Medicine dosing (worldwide, including in the US)
- Cooking and recipe measurement outside the US
- Beverage and small-container labeling
History of the Milliliter
The milliliter follows directly from the liter via the 'milli-' SI prefix. It is notable as one of the few metric units in routine US use, since medicine dosing (syringes, liquid medication) is specified in milliliters even in the US.
Historical origin. Milliliter was not the invention of a single named person; it developed through the process described above.
Understanding the Fluid ounce
Fluid ounce (fl oz) measures volume. The US fluid ounce is 1/128 of a US gallon: exactly 29.5735295625 milliliters. It is classified as a US customary unit.
Where it's used: United States (beverage, nutrition labeling)
Uses of the Fluid ounce today
- US beverage container sizing (soda, water bottles)
- US nutrition and medication dosing labels
History of the Fluid ounce
The US fluid ounce follows from the same English wine-gallon system as the rest of the US liquid volume units, defined as a consistent fraction of the gallon.
Historical origin. Fluid ounce was not the invention of a single named person; it developed through the process described above.
Milliliter — sources
- BIPM SI Brochure — SI prefixes — Defines 'milli-' as the prefix for 10⁻³.
Fluid ounce — sources
- NIST Handbook 44, Appendix C — General tables of units including the US fluid ounce definition.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many fluid ounces are in 1 milliliter?
1 milliliter equals 0.0338140227 fluid ounces, using the exact defined conversion factor rather than an estimate.
How do I convert milliliter to fluid ounce?
Multiply the milliliter value by 0.0338140227. The converter above does this instantly to whatever precision you set.
How do I convert fluid ounce back to milliliter?
Use the reverse factor: 1 fluid ounce equals 29.57352956 milliliters. You can also use the swap control in the converter above to flip the direction instantly.
What is a milliliter?
Milliliter (mL) measures volume. A milliliter is one-thousandth of a liter, equal to one cubic centimeter. It is classified as a SI derived (metric prefix) unit.
What is a fluid ounce?
Fluid ounce (fl oz) measures volume. The US fluid ounce is 1/128 of a US gallon: exactly 29.5735295625 milliliters. It is classified as a US customary unit.
Is the milliliter to fluid ounce conversion exact?
Yes. The US fluid ounce is 1/128 of a US gallon: exactly 29.5735295625 milliliters. That fixed definition is what the converter above uses, so any rounding you see is a display choice, not a limitation of the math.
Where is the milliliter still used today?
Standard small-volume unit worldwide