How many cups of sugar in a 5 lb bag?

A 5 lb (72 ounce) bag of sugar contains approximately 9 cups of sugar. To convert pounds to cups, multiply the weight by 2 and then divide by 3. So, 5 x 2 = 10 and 10 / 3 = 3.3 cups. There are approximately 3 cups in a pound of sugar. Therefore, a 5 lb bag of sugar contains 5 x 3.3 = 16.5 cups of sugar or approximately 9 level cups.