Volume conversion
40 cups to fl oz
320 fl oz
40 US cups = 320 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: 40 × 8 = 320 fl oz.
Values near 40 cups
| cups | fl oz |
|---|---|
| 37 | 296 |
| 38 | 304 |
| 39 | 312 |
| 40this page | 320 |
| 41 | 328 |
| 42 | 336 |
| 43 | 344 |
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 40 cups in fl oz?
40 cups equals 320 fl oz. The reference table below shows the values immediately around 40 cups.
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.