Fluid Ounce Conversions
1 Fluid Ounce =
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A U.S. fluid once is 1/128th of a U.S. gallon.
It is not the same as an ounce of weight. However, a fluid ounce of butter weighs about one ounce.
In the United States, butter is commonly sold in sticks that are 8 tablespoons (1/2 cup) in size.