Fluid Ounces to Milliliters Converter
Enter the volume in fluid ounces below to convert it to milliliters.
Convert Fluid Ounces (US) to Milliliters
Enter a value in fluid ounces (us) (fl oz) to convert to milliliters (mL).
Fluid Ounce to Milliliter Conversion Table
Table showing various fluid ounce measurements converted to milliliters. Click any preset value or arrow to load it into the converter.
| Fluid Ounces (US) (fl oz) | Milliliters (mL) |
|---|---|
| 1 fl oz | 29.5735296 mL |
| 2 fl oz | 59.1470591 mL |
| 4 fl oz | 118.2941182 mL |
| 5 fl oz | 147.8676478 mL |
| 8 fl oz | 236.5882365 mL |
| 10 fl oz | 295.7352956 mL |
| 15 fl oz | 443.6029434 mL |
| 16 fl oz | 473.176473 mL |
| 20 fl oz | 591.4705912 mL |
| 25 fl oz | 739.3382391 mL |
How to Convert Fluid Ounces to Milliliters
To convert fluid ounces to milliliters, multiply the volume by the following conversion ratio: 29.5735296 milliliters/fluid ounce.
Since one fluid ounce is equal to 29.5735296 milliliters, you can use this simple formula to convert:
The volume in milliliters is equal to the volume in fluid ounces multiplied by 29.5735296.
For example, here's how to convert 8 fluid ounces to milliliters using the formula above.
How Many Milliliters Are in a Fluid Ounce?
There are 29.5735296 milliliters in a fluid ounce, which is why we use this value in the formula above.
Our fluid ounce to milliliter calculator automatically converts your volume measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Fluid Ounces and milliliters are both units used to measure volume. Keep reading to learn more about each unit.
What Is a Fluid Ounce?
A fluid ounce is a unit of volume equal to 0.0295735 liters (L), the base unit for volume. 1/128 of a US gallon (29.5735 mL). [1]
The fluid ounce is classified as a US customary unit of volume. Fluid Ounces can be abbreviated as fl oz; for example, 1 fluid ounce can be written as 1 fl oz.
When working with fluid ounces (fl oz) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, fluid ounces (fl oz) are widely used across standard volume applications within US customary workflows, engineering documentation, and technical data sheets.
What Is a Milliliter?
A milliliter is a unit of volume equal to 1/1,000 of a liter (0.001 L). One-thousandth of a liter, identical to 1 cubic centimeter (cc). [2]
The milliliter is classified as a metric and SI-compatible unit of volume. Milliliters can be abbreviated as mL; for example, 1 milliliter can be written as 1 mL.
In the metric system, "milli" is the standard SI prefix for thousandths, or 10⁻³. This makes the milliliter (mL) a convenient decimal multiple of the liter (L).
In practice, milliliters (mL) are widely used across fine-tolerance laboratory, analytical, and micro-scale volume measurements within SI metric workflows, engineering documentation, and technical data sheets.
When converting volume between fluid ounces (fl oz) and milliliters (mL), keep full floating-point precision (1 fl oz = 29.5735296 mL; 1 mL = 0.033814 fl oz) during intermediate calculations and round only the final milliliter figure to match your instrument tolerance.
More Fluid Ounce & Milliliter Conversions
Need to calculate in the opposite direction? Use our milliliters to fluid ounces (us) converter (mL to fl oz) to switch your starting unit immediately. You can also explore related tools such as converting cups (us) to milliliters, converting cubic centimeters to milliliters, or converting fluid ounces (us) to cups (us).
Convert from Fluid Ounces
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Frequently Asked Questions
References
- [1]NIST OWM StandardNIST OWM (SI Units — Volume)·Volume & Liquid Metrology Standard — Fluid Ounces (US) (fl oz) to Milliliters (mL)
- [2]NIST HB 44 SpecificationNIST HB 44 (Liquid & Dry Capacity Tables)·Unit Specifications: Fluid Ounce (US) (fl oz) & Milliliter (mL)
- [3]NIST SP 811 ReferenceNIST SP 811 (NIST SP 811 App. B.9)·Conversion Factors & Mathematical Basis (fl oz to mL)