US cups to US fluid ounces Converter
Convert US cups to US fluid ounces instantly. 1 cup = 8 fl oz. Free two-way converter with the formula and a quick reference table.
How to convert US cups to US fluid ounces
US fluid ounces = US cups × 8
One US cup equals 8 US fluid ounces, so to convert US cups to US fluid ounces you multiply by 8. Going the other way, one US fluid ounce is 0.125 US cups. Both units measure volume, so the conversion is an exact ratio that never changes.
10 US cups = 80 US fluid ounces. Multiply your US cup figure by the factor above (or just type it into the box) to convert any amount.
Need the other direction? US fluid ounces to US cups
US cups to US fluid ounces table
| US cups (cup) | US fluid ounces (fl oz) |
|---|---|
| 1 | 8 |
| 2 | 16 |
| 3 | 24 |
| 5 | 40 |
| 10 | 80 |
| 20 | 160 |
| 25 | 200 |
| 50 | 400 |
| 100 | 800 |
| 250 | 2,000 |
| 500 | 4,000 |
| 1,000 | 8,000 |
Frequently asked questions
How many US fluid ounces are in a US cup?
One US cup equals 8 US fluid ounces. So to convert, multiply the number of US cups by 8.
How do I convert US cups to US fluid ounces?
Multiply by 8, or simply enter the value in the converter above — it does the math instantly and works both ways.
Is this conversion exact?
Yes — both units measure the same quantity, so the ratio is fixed and this uses the standard internationally-agreed factor.