How many fluid ounces are contained in one gallon?

One gallon is equal to 128 fluid ounces. This conversion is based on the standard measurement used in the United States, where one gallon is defined as exactly 128 fluid ounces. Understanding this relationship is important for tasks that involve liquid measurements, such as cooking, calibrating equipment, or conducting scientific experiments. The clarity of this measurement also aids in ensuring accuracy and consistency across various applications in both daily activities and professional contexts.