Formula
Convert fluid ounces to cups with:
cup = fl oz / 8
Example
8 fl oz = 1 cup
fluid ounces to cups table
Questions
How many cups are in a fluid ounce?
One fluid ounce is 0.125 cups. Enter any value above to convert instantly.
What is the formula to convert fluid ounces to cups?
Use cup = fl oz / 8. The calculator applies this for every value you type.
Is this conversion exact?
Yes — it uses the standard conversion factor (cup = fl oz / 8), rounded to 6 significant digits for display.