Milliliters to Fluid Ounces

This formula converts a volume measured in milliliters into US fluid ounces by multiplying by the fixed conversion factor 0.033814. That factor comes from the defined relationship between the two units: 1 US fluid ounce is equal to about 29.5735 mL, so 1 mL is about 0.033814 fl oz. Because the units measure the same quantity, volume, the conversion is just a proportional rescaling.

Use this when a recipe, lab measurement, or product label gives volume in milliliters but you need the amount in US fluid ounces. It is especially useful in cooking, medicine, chemistry, and comparing drink sizes.

• Using the wrong ounce unit, such as UK fluid ounces instead of US fluid ounces
• Multiplying by 29.5735 instead of 0.033814 when converting from milliliters to fluid ounces
• Rounding too early and losing accuracy in the final result