Question: how many fluid ounces is one cup of butter?
Answer: One US cup of butter converted to fluid ounce equals to 8.00 fl-oz. How many fluid ounces of butter are in 1 US cup? The answer is: The change of 1 cup us ( US cup ) unit in a butter measure equals = into 8.00 fl-oz ( fluid ounce ) as per the equivalent measure and for the same butter type.