How many quarts are there in a gallon?

A gallon contains four quarts, which is a standard measurement in the United States customary system. This conversion is based on the established relationship between these units of volume. A quart is one-fourth of a gallon, meaning that when you multiply four quarts by one gallon, you return to the original gallon measurement. This fundamental relationship is important in cooking, physics, and any practical application needing volume measurement. Hence, the answer indicating four quarts accurately reflects the conversion between these two units of measurement.