How many ounces are in a gallon?

There are 128 ounces in a gallon, a critical conversion for large-scale measurements in cooking or when handling bulk liquids. This measurement comes from the U.S. liquid measurement system, where one gallon comprises four quarts, each quart contains two pints, and each pint holds 16 ounces. This hierarchical structure of measurements ensures precise scaling in both domestic and commercial culinary practices.