Ounces to Milliliters Converter
Convert fluid ounces to milliliters instantly. 1 fl oz = 29.5735 mL. Formula, table and the baby-bottle measurement gap.
Written by Rahman · Last reviewed
Quick answer
One US fluid ounce equals 29.5735 milliliters. Multiply fluid ounces by 29.5735 to get millilitres, so a standard 4 fl oz baby bottle holds about 118.3 mL.
| Cubic metre (m³) | 0.00002957352969 |
| Litre (L) | 0.02957352969 |
| Millilitre (mL) | 29.57352969 |
| Cubic centimetre (cm³) | 29.57352969 |
| Cubic inch (in³) | 1.804687508 |
| Cubic foot (ft³) | 0.001044379345 |
| Cubic yard (yd³) | 0.00003868071647 |
| US gallon (gal) | 0.007812500033 |
| US quart (qt) | 0.03125000013 |
| US pint (pt) | 0.06250000026 |
| US cup (cup) | 0.1250000005 |
| US fluid ounce (fl oz) | 1 |
| US tablespoon (tbsp) | 2 |
| US teaspoon (tsp) | 6.000000025 |
| Imperial gallon (gal (UK)) | 0.006505267095 |
| Imperial pint (pt (UK)) | 0.05204213676 |
| Oil barrel (bbl) | 0.0001860119055 |
| Board foot (lumber) (FBM) | 0.01253255222 |
| Thousand board feet (MBF) | 0.00001253255213 |
| Cord (firewood) (cord) | 0.000008159213639 |
fl oz to mL conversion table
| fl oz | mL |
|---|---|
| 1 fl oz | 29.57352969 mL |
| 2 fl oz | 59.14705938 mL |
| 3 fl oz | 88.72058906 mL |
| 4 fl oz | 118.2941188 mL |
| 5 fl oz | 147.8676484 mL |
| 6 fl oz | 177.4411781 mL |
| 7 fl oz | 207.0147078 mL |
| 8 fl oz | 236.5882375 mL |
| 9 fl oz | 266.1617672 mL |
| 10 fl oz | 295.7352969 mL |
| 20 fl oz | 591.4705938 mL |
| 30 fl oz | 887.2058906 mL |
| 40 fl oz | 1182.941188 mL |
| 50 fl oz | 1478.676484 mL |
| 60 fl oz | 1774.411781 mL |
| 70 fl oz | 2070.147078 mL |
| 80 fl oz | 2365.882375 mL |
| 90 fl oz | 2661.617672 mL |
| 100 fl oz | 2957.352969 mL |
| 250 fl oz | 7393.382422 mL |
| 500 fl oz | 14786.76484 mL |
| 1000 fl oz | 29573.52969 mL |
How to convert fl oz to mL
US baby bottles and feeding guidance are almost always given in ounces, while bottles sold in most other countries, and paediatric guidance there, use millilitres; parents moving between the two systems, or using an imported bottle with a US feeding schedule, need an accurate conversion rather than a rounded guess, since feeding amounts for infants are given in fairly narrow ranges.
A US fluid ounce is defined as 1/128 of a US gallon, which is itself 231 cubic inches, so the 29.5735 mL figure descends from the same 18th-century wine-gallon definition behind the US gallon, rather than being an independently chosen round number. A standard US soda can holds 12 fl oz (354.9 mL), while the equivalent can sold in most other countries is a rounder 330 mL, smaller, and marketed as its own locally standard size rather than a converted one.