Dry ounces are a measure of weight. They are most commonly used on the packaging of food sold in grocery stores. Cups are a measurement of volume. Cup measures are most commonly used in recipes. Since each unit is a different measurement of a property of food, there is not a direct conversion from one to the other. In order to convert the units, a third property known as "density" must be known. Each food has its own unique density.
- Skill level:
Locate the density of the food. Food density charts can be found online.
Ensure that the density is in ounces per cup. If it is not, use a conversion tool to acquire the correct units.
Multiply the number of dry ounces by the food's density. The result is the number of cups.
Conversion by Hand
Navigate to a weight to volume converter online.
Choose a food from the "Substance" list. Or, enter the density of the food in the "Density" box and choose the correct units of density from the drop down menu.
Choose "Ounce [Weight]" from the "From This" list. Choose "Cup [US]" from the "To This" list.
Press "Calculate." The result is displayed in the "Result" box.
Conversion with Online Calculator
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