Convert fluid ounces to cups
Fluid ounce (fl oz) to cup (cup). One fluid ounce equals 0.125 cups.
Formula
Fluid ounce to cup conversion table
| Fluid ounces | Cups | Cups | Fluid ounces |
|---|---|---|---|
| 1 fl oz | 0.125 cup | 1 cup | 8 fl oz |
| 2 fl oz | 0.25 cup | 2 cup | 16 fl oz |
| 3 fl oz | 0.375 cup | 3 cup | 24 fl oz |
| 5 fl oz | 0.625 cup | 5 cup | 40 fl oz |
| 10 fl oz | 1.25 cup | 10 cup | 80 fl oz |
| 20 fl oz | 2.5 cup | 20 cup | 160 fl oz |
| 50 fl oz | 6.25 cup | 50 cup | 400 fl oz |
| 100 fl oz | 12.5 cup | 100 cup | 800 fl oz |
| 500 fl oz | 62.5 cup | 500 cup | 4000 fl oz |
| 1000 fl oz | 125 cup | 1000 cup | 8000 fl oz |
To convert fluid ounces to cups, divide the number of fluid ounces by 8. One fluid ounce equals 0.125 cups, and one cup equals 8 fluid ounces, so the relationship is fixed and exact. As a worked example, 10 fl oz comes to 1.25 cup. 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 fluid ounce values already worked out in cups, plus the reverse cup to fluid ounce direction, which is handy for quick reference or double-checking a result by hand.
Frequently asked questions
How many cups are in a fluid ounce?
One fluid ounce equals 0.125 cups. The ratio is constant, so you can multiply any number of fluid ounces by 0.125 to get cups.
What is the formula to convert fluid ounces to cups?
Use cups = fluid ounces ÷ 8. UnitGlide applies this exact formula for every value, so results stay accurate across the whole range.
How do I convert cups back to fluid ounces?
Go the other way by using one cup equals 8 fluid ounces. You can also press the swap button in the converter above to flip the direction in one click.
Is this fluid ounce to cup 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.