How many cubic inches are in one gallon?

One gallon is equal to 231 cubic inches. This measurement is derived from the relationship between fluid volume units, where a gallon is standardly defined as the volume of liquid that is equal to 231 cubic inches. This conversion is commonly used in various applications such as fluid mechanics, engineering, and when working with different measurement systems to ensure accurate calculations in both household and industrial contexts. Understanding this conversion is essential for tasks that involve accurate volume measurements, especially in fields that deal with liquids or gases in various forms.