Fluid Ounces to Milliliters Converter
1 US fluid ounce = 29.5735295625 milliliters.
Conversion result
Milliliters = US fluid ounces × 29.5735295625; US fluid ounces = milliliters ÷ 29.5735295625.
Primary source: NIST SP 811, Appendix B.8 conversion factors. Published SI table values may be rounded; this converter uses the exact underlying definitions. NIST Handbook 44, Appendix C supplies the underlying inch, pound and US liquid measure definitions. NIST SP 1038, footnote 19 defines the US cup, tablespoon and teaspoon in fluid ounces.
Worked example: 2 US fluid ounces × 29.5735295625 = 59.147059125 milliliters.
Common conversion values
The table follows the selected direction. Results display up to 12 significant digits; exact definitions are used before display rounding.
| US fluid ounces | milliliters |
|---|---|
| 0.5 | 14.7867647812 |
| 1 | 29.5735295625 |
| 2 | 59.1470591250 |
| 4 | 118.294118250 |
| 8 | 236.588236500 |
A US fluid ounce is 1/128 of a US liquid gallon: 3785.411784 ÷ 128 = 29.5735295625 mL. An Imperial fluid ounce is different. Mass ounces cannot be converted to mL without density.
Conversions use the measure named on the label. A US customary cup is 236.5882365 mL, rather than a 240 mL nutrition-label cup or a 250 mL metric cup. Actual measuring vessels and ingredient packing may vary.
How to use this tool
Enter a quantity in US fluid ounces, choose the forward or reverse direction, and select Convert. Decimals, fractions such as 1/2, and mixed fractions such as 1 1/2 are supported.
Frequently asked questions
Why does this say fluid ounces?
Milliliters measure volume. This converter uses US fluid ounces of volume, not avoirdupois ounces of mass or Imperial fluid ounces.
Can I reverse the conversion or enter a fraction?
Yes. Choose the reverse direction on this same page. Enter a nonnegative decimal, fraction such as 3/4, or mixed fraction such as 1 1/2. Zero is accepted; the quantity and fraction components are limited to 10¹², and a denominator must be positive.
Is this converter free and private?
Yes. Conversions run on your device without uploading your entries or saving them to browser storage. There is no sign-up.