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| Gallons | Ounces (oz) |
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Transform gallons to ounces (oz) or back again effortlessly with this handy tool—great for recipes, DIY projects, or everyday calculations!
A gallon is a US customary unit of volume equal to 128 fluid ounces. A fluid ounce (oz) is about 29.5735 mL, widely used in the imperial system.
The US gallon traces back to the British wine gallon, standardized in 1707. The fluid ounce emerged from earlier English units, refined over centuries.
Gallons are prevalent in the US for fuel, beverages, and large volumes. Ounces are key in cooking and product labeling, making conversion essential.