A pint of blueberries weighs about 3/4 pound, or 12 ounces. There are 16 ounces in 1 pound, so 1 1/3 pints of blueberries are in 1 pound.
A dry pint is a measurement of volume, not a measurement of weight, so a pint of one material does not weigh the same as a pint of another material. A pint of blueberries is about two dry cup measures. There can be some variation in the weight of pints of blueberries sold by stores. A 10-ounce package of frozen blueberries is only equal to about 1 1/2 cups. Marge Perry of My Recipes advises that those cooking with frozen blueberries should let them thaw before adding them to the dish, as this maintains their texture.