Convert cups to fluid ounces
Cup (cup) to fluid ounce (fl oz). One cup equals 8 fluid ounces.
Formula
Cup to fluid ounce conversion table
| Cups | Fluid ounces | Fluid ounces | Cups |
|---|---|---|---|
| 1 cup | 8 fl oz | 1 fl oz | 0.125 cup |
| 2 cup | 16 fl oz | 2 fl oz | 0.25 cup |
| 3 cup | 24 fl oz | 3 fl oz | 0.375 cup |
| 5 cup | 40 fl oz | 5 fl oz | 0.625 cup |
| 10 cup | 80 fl oz | 10 fl oz | 1.25 cup |
| 20 cup | 160 fl oz | 20 fl oz | 2.5 cup |
| 50 cup | 400 fl oz | 50 fl oz | 6.25 cup |
| 100 cup | 800 fl oz | 100 fl oz | 12.5 cup |
| 500 cup | 4000 fl oz | 500 fl oz | 62.5 cup |
| 1000 cup | 8000 fl oz | 1000 fl oz | 125 cup |
To convert cups to fluid ounces, multiply the number of cups by 8. One cup equals 8 fluid ounces, and one fluid ounce equals 0.125 cups, so the relationship is fixed and exact. As a worked example, 10 cup comes to 80 fl oz. Enter your own figure in the converter above to get an instant answer, or use the swap button to flip the direction. This is a volume conversion, and like every tool on UnitGlide it runs locally in your browser with no account or upload required. The table further down shows a range of common cup values already worked out in fluid ounces, plus the reverse fluid ounce to cup direction, which is handy for quick reference or double-checking a result by hand.
Frequently asked questions
How many fluid ounces are in a cup?
One cup equals 8 fluid ounces. The ratio is constant, so you can multiply any number of cups by 8 to get fluid ounces.
What is the formula to convert cups to fluid ounces?
Use fluid ounces = cups × 8. UnitGlide applies this exact formula for every value, so results stay accurate across the whole range.
How do I convert fluid ounces back to cups?
Go the other way by using one fluid ounce equals 0.125 cups. You can also press the swap button in the converter above to flip the direction in one click.
Is this cup to fluid ounce converter accurate?
Yes. It uses internationally defined SI conversion factors, as maintained by the BIPM, and all math runs in your browser so nothing is rounded away on a server. For everyday use the displayed precision is more than enough.