What is the number of quarts in a gallon?

A gallon is a standard unit of measurement in the United States customarily used for liquid volume. It is specifically defined that one gallon equals four quarts. This relationship is fundamental in both cooking and scientific measurements, making it essential for understanding fluid volumes. Knowing that there are four quarts in a gallon allows for easy conversions among different units of liquid measurement and can aid in correctly following recipes or conducting experiments that require precise liquid quantities. The other options do not accurately reflect the conversion rate of quarts to gallons, thus clarifying why the answer indicating four quarts is correct.