Convert US fluid ounces to US cups
Enter a value in US fluid ounces to convert it to US cups.
US fluid ounces to US cups reference
| US fluid ounces | US cups |
|---|---|
| 1 fl oz | 0.1232 cup |
| 2 fl oz | 0.2464 cup |
| 5 fl oz | 0.6161 cup |
| 10 fl oz | 1.2322 cup |
| 25 fl oz | 3.0806 cup |
| 50 fl oz | 6.1611 cup |
| 100 fl oz | 12.3223 cup |
The conversion factor
One US fluid ounce is 0.12322292 US cups. So to convert, multiply your figure in US fluid ounces by 0.12322292. To go the other way, multiply US cups by 8.11537356, or use the US cups to US fluid ounces converter.
Doing it in your head
For a quick estimate, round the factor: roughly "divide by 8". Use the exact converter above when the number matters.
Where this conversion comes up
Cooking and baking (especially US vs metric recipes), fuel, and container sizes.
See the common unit conversions cheat sheet for the factors worth memorising.
Related tools
Frequently asked questions
How many US cups are in a US fluid ounce?
1 US fluid ounce = 0.123223 US cups.
What is the formula to convert US fluid ounces to US cups?
Multiply the number of US fluid ounces by 0.12322292. To go back the other way, multiply US cups by 8.11537356.
What is 10 US fluid ounces in US cups?
10 US fluid ounces = 1.2322 US cups. The reference table below lists more common values.
Is this converter accurate?
It uses the internationally defined conversion factors and computes at full floating-point precision, then rounds only the displayed result. For everyday purposes it is exact; for legal, engineering or scientific work, confirm the required number of significant figures.
Does it work offline?
Yes. The conversion runs in your browser with no server call, so it keeps working with no connection, and nothing you enter is uploaded.
Last reviewed: September 2026. Figures and formulas are checked against their published sources; see the site's data notes.