There are 128 ounces in 4 liters of liquid. This is because there are 33.814 fluid ounces in 1 liter. To find the number of fluid ounces in 4 liters, you multiply 33.814 by 4, which equals 135.256. Since there are 16 ounces in a pound, you divide 135.256 by 16 to get 8.4535 pounds