A liter is a unit of volume in the metric system, and it is equivalent to 33.814 ounces. This conversion is based on the fact that one liter is equal to 1,000 milliliters, and one ounce is approximately 29.5735 milliliters. Therefore, when you convert liters to ounces, you multiply the number of liters by 33.814 to get the equivalent number of ounces. For example, if you have 2 liters, you would calculate 2 x 33.814, which equals 67.628 ounces. This conversion is useful in various contexts, such as cooking, science experiments, and everyday measurements.