How much is 13.50 ounces of powdered sugar to cups?

To convert ounces to cups, you can use the conversion that 1 cup of powdered sugar is approximately 4.5 ounces. Therefore, to find out how many cups are in 13.50 ounces, you divide 13.50 by 4.5, which equals about 3 cups. So, 13.50 ounces of powdered sugar is roughly 3 cups.