How many pounds of sugar will fill you gallon jug?

One gallon is equivalent to 128 fluid ounces. Sugar weighs approximately 7.09 ounces per cup. Therefore, if a gallon jug can hold 128 fluid ounces, and each cup of sugar weighs 7.09 ounces, you would need approximately 18 cups of sugar to fill a gallon jug. This would be roughly 9.72 pounds of sugar.