Cup (US)
The US cup is a customary volume unit equal to 8 fluid ounces or about 236.588 milliliters. Originating from practical kitchen measures, it has become a standard in American recipes, baking, and beverage portions. The cup facilitates straightforward scaling in recipes and is widely recognized in cookbooks, culinary schools, and food packaging.
Gallon (US)
The US gallon, symbol gal, equals 4 quarts, 8 pints, or 128 fluid ounces (~3.785 liters). Its origins trace to English wine and ale measures but were standardized in the US in the 19th century. Gallons are used for beverages, fuel, and large-volume recipes. While metric liters are the dominant unit of measurement in most countries, gallons remain widely used in the United States for everyday and industrial liquid measurements.