How many ounces are in 1 gallon?

One gallon is equivalent to 128 ounces. This conversion is based on the fact that there are 4 quarts in a gallon, and each quart contains 32 ounces. Therefore, when you multiply the number of quarts in a gallon (4) by the number of ounces in a quart (32), you end up with a total of 128 ounces in one gallon. Understanding these measurements is crucial, especially in nursing and healthcare settings, where precise dosing and liquid measurement are often required.