One US fluid ounce is 29.5735 ml, so 500 ml is about 16.9 US fluid ounces. UK imperial fluid ounces are slightly smaller at 28.41 ml, making 500 ml about 17.6 imperial fluid ounces. A free ml to oz converter gives the exact figure either way, right in your browser.
Free ml to oz converter. Convert milliliters to US fluid ounces instantly (1 fl oz = 29.5735 mL). Live result as you type, no sign-up, private.
Open ML to OZ Converter → Free toolFree fl oz to ml converter. Convert US fluid ounces to milliliters instantly (1 fl oz = 29.5735 mL). Live result as you type, no sign-up, private.
Open Fluid Ounces to ML Converter → Free toolFree cooking measurement converter. Convert between cups, tablespoons, teaspoons, fluid ounces, and milliliters for recipes instantly as you type.
Open Cooking / Recipe Converter →Recipes and drink sizes cross borders, but the fluid ounce did not travel intact: the US customary fluid ounce is 29.5735 ml while the UK imperial one is 28.4131 ml. The difference is only a few percent, which is invisible for a glass of water but real when scaling a recipe. Check which system your source uses, US recipe sites mean US ounces.
A fluid ounce is a volume unit and an ounce on a scale is weight, and they only coincide for water-like liquids. For honey, oil or syrup, converting fluid ounces to grams needs the ingredient density, which is a job for a cooking converter rather than a flat factor.
A US cup of 8 US fluid ounces is about 237 ml, since 8 x 29.5735 = 236.6.
For casual use yes, it overstates the US ounce by about 1.4 percent. Use the exact 29.5735 factor when scaling recipes.
No. Fluid ounces measure volume. Converting to weight requires the density of the liquid.