Convert imperial fluid ounces to us gallons instantly.
Definition: An imperial fluid ounce is one 160th of an imperial gallon, equal to about 28.4131 milliliters.
History/origin: It developed as the small-volume subdivision of the imperial gallon and remained distinct from the US fluid ounce.
Current use: Imperial fluid ounces appear mostly in legacy UK packaging, recipes, and older measurement references.
Definition: The US gallon is a customary volume unit. It contains 4 US quarts, 8 US pints, 128 US fluid ounces, or exactly 3.785411784 L.
History/origin: The United States kept a gallon based on earlier English practice, while Britain later standardized a different imperial gallon, creating the modern split.
Current use: US gal is common at gas pumps, in paint cans, water jugs, aquarium sizes, pool chemicals, cleaning products, and many American bulk-liquid labels.
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