7 12 cups The average 32-ounce (2-pound) box of powdered sugar contains approximately 7 12 cups of powdered sugar.
How many cups does one pound of powdered sugar contain?
Powdered sugar directly from the box or plastic bag weighs 4 1/2 ounces per cup; therefore, a 1-pound box (or 16 ounces) provides approximately 3 1/2 cups of powdered sugar.