Convert US fluid ounces to milliliters instantly, using the exact definition where one US fluid ounce is 29.5735295625 milliliters. This is the conversion for drink sizes, recipes, and bottle labels when a volume is given in fluid ounces but you need it in milliliters. Type any number of fluid ounces and the milliliter value updates live as you type, carried to a couple of decimals for accuracy. Note that a US fluid ounce is a measure of volume, not weight, and it differs from the imperial (UK) fluid ounce of about 28.41 milliliters, so this tool uses the US definition, which is the most common online. Multiplying by 29.57 by hand is error prone, so the tool keeps you precise. It runs in your browser, so it is instant, private, and works offline once loaded.