Ounces can be abbreviated as oz for example, 1 ounce can be written as 1 oz.Īn ounce is frequently referred to as a unit of weight. The ounce is a US customary and imperial unit of mass. The common ounce should not be confused with the troy ounce, which is equal to 1/12 of a troy pound. One ounce is a unit of mass/weight equal to 1/16 of a pound or 28.349523 grams. Keep reading to learn more about each unit of measure. It is common to mix powdered chemicals with liquid, or aqueous, chemicals, and this is where it becomes very useful to convert between weights and volumes. When performing chemical reactions by combining separate chemicals to produce a new chemical, one must know the exact amount of each chemical to add in order to maximize the yield of the reaction. When a scale is not available, a calculator like the one above is a good way to estimate the weight to volume conversion.įor cooking and baking ingredients, you can get more specific results using our butter, flour, and sugar conversion calculators.Īnother useful application of weight and volume conversions is chemistry. The best way to ensure an accurate conversion is to use a scale. The density of dry ingredients can vary for a variety of reasons, such as compaction and clumping. Ounces and cups are both commonly used to measure cooking ingredients.įor cooking applications, most chefs suggest measuring dry ingredients by weight rather than volume to improve accuracy in the measurements. You can use this simple formula to convert:Ĭups = 5 fl oz ÷ 8 = 0.625 c When to Convert Ounces to Cups To convert a measurement in ounces to cups, divide the weight by 8.3454 times the density of the ingredient or material. You'll also need a different type of measuring cup, depending on whether the ingredient is dry or liquid.ĭry measuring cups are typically made of plastic or metal and are shaped more like a scoop, while liquid measuring cups are usually transparent glass, plastic, or silicone with measurement lines along the outside. This is important to remember since there are different conversion formulas for each. When measuring a liquid, the measurement is actually the volume of liquid in fluid ounces, while for dry measurements, it's a weight. When converting ounces to cups, it's important to keep in mind that dry measurements, such as flour or sugar, are measured by weight, and liquid measurements, such as water, are measured by volume. Therefore, to convert between ounces and cups of an ingredient or substance, we must either multiply or divide by its density, depending on which direction we are performing the conversion. In this case, we need to account for the density of the substance whenever we do a conversion. Since ounces are a unit of mass and cups are a unit of volume, which are different physical quantities, we need to know one more physical quantity of the ingredient or substance to convert between them. He holds several degrees and certifications. The fluid ounce is sometimes referred to simply as an "ounce" in applications where its use is implicit.Joe is the creator of Inch Calculator and has over 20 years of experience in engineering and construction. It is equal to about 28.41 ml in the imperial system or about 29.57 ml in the US system. One customary cup is equal to 236.5882365 millilitres.Ī fluid ounce (abbreviated fl oz, fl. In the United States, the customary cup is half of a liquid pint or 8 U.S. Because actual drinking cups may differ greatly from the size of this unit, standard measuring cups are usually used instead. It is traditionally equal to half a liquid pint in either US customary units or the British imperial system but is now separately defined in terms of the metric system at values between 1⁄5 and 1⁄4 of a liter. The cup is an English unit of volume, most commonly associated with cooking and serving sizes. The units involved in this conversion are cups and fluid ounces.
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