Convert us cups to fluid ounces quickly and accurately using this free online converter
Used in cooking, beverages, and liquid measurements.
💡 The US uses cups, fluid ounces, and gallons; metric countries use liters and milliliters.
fl oz = US cup × 8
Example: 1 US cup × 8 = 8 fl oz
Use liters for international recipes; cups/gallons for US recipes.
Common uses: cooking, beverages, and liquid containers.
How do I convert US cup to fl oz?
Multiply the value in US Cups by 8. For example: 10 US cup = 80 fl oz.
When should I use Fluid Ounces instead of US Cups?
Use liters for international recipes; cups/gallons for US recipes.
Is this converter accurate?
Yes. We use internationally recognized conversion factors, updated to current standards.
| US Cups (US cup) | Fluid Ounces (fl oz) |
|---|---|
| 1 US cup | 8 fl oz |
| 2 US cup | 16 fl oz |
| 5 US cup | 40 fl oz |
| 10 US cup | 80 fl oz |
| 20 US cup | 160 fl oz |
| 50 US cup | 400 fl oz |
| 100 US cup | 800 fl oz |
| 500 US cup | 4000 fl oz |
| 1000 US cup | 8000 fl oz |