Strawberry Arithmetic. One pound strawberries equals about 3 and 3/4 cups of whole berries. One pound strawberries equals about 3 cups of sliced berries. One pound strawberries equals about 1 and 3/4 cups of mashed berries. One pound strawberries equals about 2 cups pureed berries. It is difficult to give specific measurements for berries because the sizes determine how many fit into a pint or a cup.