Volume conversion
1 cup to fl oz
8 fl oz
1 US cups = 8 US fluid ounces. Exact factor: fl oz = cups × 8.
Live converter
Edit either field — the other updates instantly. Type decimal values like 38.4.
The formula
fl oz = cups × 8
Worked example: 1 × 8 = 8 fl oz.
Values near 1 cup
| cups | fl oz |
|---|---|
| 0.25 | 2 |
| 0.5 | 4 |
| 0.75 | 6 |
| 1this page | 8 |
| 1.25 | 10 |
| 1.5 | 12 |
| 1.75 | 14 |
Frequently asked
How do you convert US cups to US fluid ounces?
Apply the formula fl oz = cups × 8. Enter any value in the live converter above and the result updates as you type.
What is 1 cup in fl oz?
1 cup equals 8 fl oz. The reference table below shows the values immediately around 1 cup.
Is this conversion exact?
Yes. Eight fluid ounces to the cup is exact. This measures volume, so it does not tell you the weight of what is in the cup.