Lightning Converter
Fluid Ounce
A fluid ounce (fl oz) is a common US customary unit of volume used to measure liquids such as beverages, cooking ingredients, and personal care products. One US fluid ounce equals 1/8 of a cup or about 29.57 milliliters. You’ll often find this unit printed on drink bottles, medicine labels, and kitchen tools where precise small measurements are needed.
Because the fluid ounce is commonly used in the United States while many other countries rely on the metric system, converting fluid ounces to milliliters, cups, or liters is a frequent need. A converter helps provide quick, accurate results that make cooking and product comparisons easier.
Fluid Ounces in Everyday Use
Fluid ounces are practical for everyday tasks because they measure amounts that are larger than teaspoons or tablespoons but smaller than cups. A standard can of soda, for example, contains 12 fluid ounces, while many personal care products — like lotions and shampoos — list their size using fl oz for easy comparison.
It’s important to note that the US fluid ounce differs from the Imperial (UK) fluid ounce, which can lead to confusion in international contexts. One US fluid ounce is slightly less than 30 milliliters, so a conversion tool helps ensure accurate translations when following recipes or checking product volumes. Whether cooking, traveling, or shopping, understanding fluid ounce conversions keeps measurements clear and reliable.
