It is difficult to answer a question like this as cups are a measure of volume while pounds are a measure of weight. read more
1 pound brown sugar = 2 1/4 to 2 1/3 cups 1 pound confectioners sugar = 3 3/4 cups unsifted For information on other different types of sugars, see 7 Ways with Sugar. read more
Confectioners sugar, on the other hand, contains about 3 3/4 cups of sugar per pound before it is sifted. It has more cups per pound because it is ground finer. Brown sugar has a similar ratio to granulated sugar at 2 1/2 cups per pound. On the smaller end, a single packet of sugar is equal to a teaspoon of sugar. read more