Quick Answer: Fluid Ounces (US) to Milliliters
One fluid ounces (US) equals 29.5735296 milliliters (1 fl oz = 29.5735296 mL).
Conversely, 1 mL = 0.0338140227 fl oz.
Formula: mL = fl oz × 29.5735295625
Worked examples
- 1 fl oz = 29.5735296 mL
- 2 fl oz = 59.1470591 mL
- 4 fl oz = 118.294118 mL
Method and limitations
To convert US fluid ounces to milliliters, multiply the fluid ounce value by 29.5735295625. Calculations use full-precision constants; displayed values are rounded to at most 9 significant figures. Results are rounded for display only. Full precision is kept internally, so long chains of conversions do not accumulate rounding error. Where US customary and imperial units share a name (for example fluid ounces and gallons), this page uses the US customary definition and says so explicitly.
Each factor is exact by definition, derived from exact definitions, or a documented conventional value — see the methodology and sources.
Conversion Formula
To convert US fluid ounces to milliliters, multiply the fluid ounce value by 29.5735295625.
Step-by-Step Conversion Guide
Follow these steps to convert fluid ounces (us) to milliliters manually:
Start with your value in fluid ounces (us)
Example: You want to convert 4 fl oz
Apply the conversion formula
Use the formula: mL = fl oz × 29.5735295625
Calculate the result
4 fl oz = 118.2941 mL
Verify your answer
Use our calculator above to double-check your manual calculation.
Quick Mental Math Tip
To convert US fluid ounces to milliliters, multiply the fluid ounce value by 29.5735295625.
Common Conversions
| Fluid Ounces (US) (fl oz) | Milliliters (mL) | Milliliters → Fluid Ounces (US) |
|---|---|---|
| 1 fl oz | 29.5735 | 1 mL = 0.033814 fl oz |
| 2 fl oz | 59.1471 | 2 mL = 0.067628 fl oz |
| 4 fl oz | 118.294 | 4 mL = 0.135256 fl oz |
| 6 fl oz | 177.441 | 6 mL = 0.202884 fl oz |
| 8 fl oz | 236.588 | 8 mL = 0.270512 fl oz |
| 12 fl oz | 354.882 | 12 mL = 0.405768 fl oz |
| 16 fl oz | 473.176 | 16 mL = 0.541024 fl oz |
| 20 fl oz | 591.471 | 20 mL = 0.67628 fl oz |
| 32 fl oz | 946.353 | 32 mL = 1.08205 fl oz |
| 64 fl oz | 1,892.71 | 64 mL = 2.1641 fl oz |
Did You Know?
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Frequently Asked Questions
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Conversion factors on this page are either exact by definition, derived from exact definitions, or conventional values in documented use. Each is listed with its source in our conversion methodology and sources, which cites the BIPM SI Brochure, NIST Special Publication 811 and the relevant IEC or national standards. Results are rounded for display only; calculations use full precision.