How to convert US fluid ounces to milliliters
Formula: ml = fl oz ÷ 0.0338140227. Worked example: 3.4 fl oz = 100.55 ml. Quick estimate: multiply by about 30 — the error is 1.4%, fine for everyday use but not for engineering or shopping by exact size.
About these units
The US fluid ounce is exactly 29.5735295625 ml. Cosmetics and drinks are often labelled in both units: 100 ml ≈ 3.4 fl oz (the cabin-baggage liquid limit), a 12 fl oz can ≈ 355 ml. The imperial fluid ounce is slightly smaller at 28.4130625 ml.
Category: volume. Results on this page are calculated in your browser and rounded to 7 significant digits; the table above uses 6. For other units of volume open the full unit converter, or use the reverse page — milliliters to us fluid ounces.