How many cups is 16 oz powdered Sugar? Powdered sugar or plastic bags weigh 4 2 1/2 ounces per cup, so one pound box (or 16 ounces) contains about 3 1/2 cups powdered sugar. If prescription powdered sugar is required, weigh 1 pound of shielded powdered sugar equal to 1 dry measuring cup. Carrying powdered sugar makes it lighter and lighter, so it takes up more space in the cup
Everyone knows that 1 cup is equal to 8 ounces, right? Well, regarding prescription ingredients, 1 cup is not always equal to 8 ounces. We know that 1 cup of water weighs 8 ounces, but honey, for example, is thicker than water, so 1 cup of honey weighs 12 ounces
There are two American cups at 16 ounces. This is true in liquid measurements. A 16ounce powdered sugar package is about 4 cups
FAQS
How many cups of pound sugar are in 32 ounces?
One cup is eight ounces in volume. So 32 ounces of pound sugar, by volume, is equal to 4 cups
The first box contains 16 oz or 4 cups, the cup is the liquid unit of the United States, while the ounce (oz) is used to measure weight.
Therefore, we use Fl Flood ions to measure liquids.
Here, we will use fluid ounces.

1 ounce (liquid ounce) = 1/8 cup

16 oz (liquid ounce) = 16 * (1/8) cup

16 oz (liquid ounce) = 16/8 cup

16 oz (liquid ounce) = 2 cups
So, the answer is 2 cups

One fl oz = 29.5735297 ml (using the traditional American system).

One ounce = 28.3495231 grams (using the International AirDeplace system)
Also, if ‘oz’ here means ‘ounce’ and not ‘liquid ounce’, then the price of ‘cup’ will vary according to the object/thing/component and its density. So, in this case, the answer is different for different things
I have some old recipes for a box of powdered sugar. Do they say How many cups will be equal? I buy a pound of sugar in a twopound bag.?
The best estimate would be a pound, as it is still often sold in stores in 1lb boxes.
If you search for Google Image for [Powder Sugar Box] you will find many more like this.
As others have said, it is wrong to measure by volume (a pound can be 3.5 to 4.5 cups), so you’d better use a scale, or measure your twopound bags by two equal volumes. Be
If your prescription can withstand a couple of ounces (around half a cup), you can use four cups for a pound box.
The answer to how many cups there are in a pound of sugar will depend on whether your powdered sugar has tasted or softened. As usually:

1 pound = 3 1/2 to 4 cups of nonenvelope powdered sugar

1 pound = 4 1/2 cups powdered sugar
Generally sold in boxes in the United States, as in the example provided by Jeffermy, they are one pound / 16 ounces. For 2pound bags, either measure 3 1/2 to 4 cups for the recipe or, more conveniently, half the quantity in the bag.
Conversion of powdered Sugar
The icing sugar type conversion tool instantly converts the amount of icing powder sugar between cups and grams g, pound lbs, ounces, kilograms and other measuring units, and vice versa. Any icing for measurement deals with the quantity/exchange of sugar units. The confectionery sugar converter uses the following weight and volume units: cup  metric or American cup icing sugar, gram g, decigram dg g  deca, kilogram kg, ounce, pound lb, spoon TBLSP, Liquid Ounce Fill Oz, Tea Spoon Tea, Cereal GR, and American Quartet Powder Icing Sugar