How many cups in a 5 lb bag of sugar?

40 cups

Well, since it was not specified on the type of sugar.... 10 cups granulated sugar = 5 pounds 17 1/2 cups confectioners sugar = 5 pounds 12 1/2 cups brown sugar = 5 pounds

A reasonable estimate would be about 9 cups. Cups is a measure of volume. Pounds is a measure of weight and mass. You can not directly convert the two.

1 cup = 8 ounces 16 ounces = 1 pound 2 cups = 1 pound 2x5= 10 cups in 5 pounds

7 lbs