Ounces to Milliliters
Convert Fluid Ounces to Milliliters instantly.
How to Convert Fluid Ounces to Milliliters
To convert US fluid ounces to milliliters, multiply by 29.5735. One US fluid ounce equals 29.5735 milliliters. This conversion is used constantly in cooking and baking (when following metric recipes), bartending and cocktail making (international recipes use ml), measuring liquid medications (prescription labels in the US use fl oz while medical literature uses ml), and comparing drink sizes across countries.
Fluid Ounces to Milliliters Reference Chart
Common conversions: 1 fl oz = 29.57 ml · 2 fl oz = 59.15 ml · 4 fl oz = 118.29 ml · 8 fl oz (1 cup) = 236.59 ml · 12 fl oz = 354.88 ml · 16 fl oz (1 pint) = 473.18 ml · 32 fl oz (1 quart) = 946.35 ml.
Frequently Asked Questions
How many ml are in a fluid ounce?
One US fluid ounce equals 29.5735 milliliters. Note that a UK (imperial) fluid ounce is slightly different at 28.4131 ml. When following international recipes, check which fluid ounce is being used — most online recipes from the US use the US fluid ounce.
How many ounces is 500 ml?
500 ml ÷ 29.5735 = 16.91 US fluid ounces. A 500 ml water bottle is just under 17 fl oz, or about 2 cups plus a little more.
How many ml is 8 fl oz?
8 fluid ounces × 29.5735 = 236.59 ml. Eight fluid ounces is one US cup — a standard serving size for beverages and a key cooking measurement. On nutrition labels, an 8 oz serving means 237 ml.
Why do medicine dosages use both fl oz and ml?
In the US, over-the-counter medicine labels are required to list dosages in metric units (ml) by the FDA, alongside household measures like teaspoons and tablespoons. Fluid ounces are not an FDA-required unit for medicine. The inclusion of ml is important because dosing errors often occur when parents use kitchen teaspoons (which vary in size) rather than the provided measuring syringe calibrated in ml.