A liter and a half is equivalent to approximately 50.72 ounces. This conversion is based on the fact that one liter equals 33.814 ounces. Therefore, to find out how many ounces are in a liter and a half, you simply multiply 1.5 by 33.814. The calculation is as follows: 1.5 liters × 33.814 ounces/liter = 50.72 ounces. This measurement is useful in various contexts, such as cooking, baking, and understanding beverage quantities.