It would be closer to 2 pounds. You should measure weight when baking! Cups is a measure of volume. Pounds is a measure of weight and mass. You can not directly convert the two.
Typically, one U.S. cup of granulated sugar weighs about 6.7 ounces, or 0.42 lbs.
approximately 11.25 cups in 5 pounds of granulated sugar
There are 2 1/4 cups to each (1) pound of granulated sugar. That said, there are 225 cups in a 100lb bag of sugar. (the ratio formula: 1 lb = 2 1/4 cups which is the same as saying 1 lb = 2.25 cups, therefore 100 lb = 225 cups.
4 cups equal 1pound of powered sugar. I measured a new bag.
Five pounds of white granulated sugar contains approximately ten cups of sugar.
That is approximately 96 teaspoons.
That would be approximately 10 cups.
In 10 lb sugar are 22 3/4 US cups.
That is 4 cups.
That is 1.8 cups
1lb sugar is equiv to 2.25 cups 25.5/2.25=11.33lbs
Approximately 2. cups.