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.
Metric Cup (250 mL)
The metric cup equals 250 milliliters and is part of the metric cooking system used worldwide, especially in Australia, Canada, and New Zealand. Unlike the US cup, it is decimal-based, making recipe scaling and international culinary communication straightforward. Metric cups are widely used in nutrition labeling, recipe books, and professional kitchens.