How many ounces are contained in one gallon?

One gallon contains 128 ounces. This is based on the conversion that one gallon is equivalent to 4 quarts, and each quart contains 32 ounces. Therefore, when you multiply 4 quarts by 32 ounces per quart, you arrive at the total of 128 ounces in a gallon. This conversion is widely used in various contexts, especially in cooking and measuring liquid substances, and is crucial for accurate pesticide application and other agricultural practices where precision in measurements is necessary.