This reply is about the question of conversion between a cup and dry ounces. Because these conversions are useful in household and commercial breads and cakes making. Ingredients are different in different parts of the world that are mentioned in this reply.
The important thing to understand while converting cup into dry ounces is that cup is a unit of volume while dry ounce is a unit of weight. To make this conversion, substance density figure is needed. As an example, a cup that is full of sugar weights less whereas a cup full oil is a more dense substance.
It can be made clear from a list of different ingredients commonly used. These results you receive will be estimations. The densities of ingredient were supplied from the Food and Agricultural Organisation of the United Nations. You can find the full list of these ingredients on the baking conversion pages available online.
Conversion from cups to dry ounces (ounces)
Name of Ingredient 1 Cup
Plain Flour (530g/L) 4.40 oz
Self Raising Flour (530g/L) 4.40 oz
Bread Flour (550g/L) 4.50 oz
Butter (958g/L) 10 oz
Oats (432g/L) 3.57 oz
Granulated Sugar (847g/L) 7.07 oz
Brown Sugar (849g/L) 7.04 oz
Caster Sugar (821g/L) 6.67 oz
Icing Sugar (565g/L) 4.67 oz
Conversion between other cooking units
Similar conversion between other cooking units like grams, pounds, quarts, tablespoon, teaspoons, liters and more are possible. In this way you can also convert between cups and grams, cups and Milli liters and ounces and Milli liters directly.