fluid ounces to cups (US) Converter
Type a value in fluid ounces and get the answer in cups (US) instantly — or convert the other way. The conversion uses the exact relationship 1 fluid ounces = 0.125 cups (US), the same formula used in textbooks and engineering references.
American recipes bounce between fluid ounces and cups mid-ingredient-list — a can says 12 fl oz, the recipe asks for 1½ cups. Since one US cup is exactly 8 fluid ounces, the conversion is a simple divide by 8.
How to use
- Type your value into the fluid ounces box — the cups (US) result updates as you type.
- To go the other direction, type into the cups (US) box instead and read the fluid ounces result.
- Copy the result with one tap, or scan the reference table below for common values.
Frequently asked questions
How do you convert fluid ounces to cups (US)?
Multiply the number of fluid ounces by 0.125. For example, 10 fluid ounces = 1.25 cups (US). The converter above does this for you and shows more decimal places than you will ever need.
How many cups (US) are in one fluid ounces?
Exactly 0.125 cups (US). This is a fixed definition, not an approximation, so the conversion is exact at any scale.
Is this converter accurate for professional use?
Yes — it uses full double-precision arithmetic and the official fluid ounces-to-cups (US) factor, so results are reliable for schoolwork, cooking, fitness, travel and technical work.
Can I convert cups (US) back to fluid ounces?
Yes. The converter is two-way: just type in the second box and the first box updates instantly with the reverse conversion.