Cups (us) to Fluid ounces (us) Converter
Convert cup (US) to fluid ounce (US) instantly. Type a value below — the result updates as you type.
When you need to convert cup (US) to fluid ounce (US)
Volume conversions show up most in the kitchen and at the pump — scaling a recipe written for another country, dosing a liquid, or comparing fuel and drink sizes between metric and US/UK measures.
Typical values: 0.5 cup is about 4 fl oz, and 100 cup works out to roughly 800 fl oz. Because the ratio is fixed at 8, you can scale any amount linearly — doubling the cups (US) doubles the fluid ounces (US).
US and UK 'cups', 'pints' and 'gallons' differ, so always check which system a recipe or label uses before converting.
How to convert cup (US) to fluid ounce (US)
One cup (US) equals 8 fluid ounces (US). To convert, multiply the number of cups (US) by 8:
fluid ounces (US) = cups (US) × 8
For example, 10 cups (US) × 8 = 80 fluid ounces (US).
Cups (us) to fluid ounces (US) conversion table
| Volume (cup) | Fluid ounces (us) (fl oz) |
|---|---|
| 1 cup | 8 fl oz |
| 2 cup | 16 fl oz |
| 3 cup | 24 fl oz |
| 5 cup | 40 fl oz |
| 10 cup | 80 fl oz |
| 20 cup | 160 fl oz |
| 50 cup | 400 fl oz |
| 100 cup | 800 fl oz |
FAQ
How many fluid ounces (US) are in a cup (US)?
One cup (US) = 8 fluid ounces (US).
How do I convert fluid ounces (US) back to cups (US)?
Divide by 8, or use the fluid ounces (US) to cups (US) converter.