Convert US cups to US fluid ounces
1 cup = 8 fl oz. Change the amount below, or read the formula and the reference table further down.
1 US cup equals
US fluid ounces
1 cup = 8 fl oz
The formula
US cups and US fluid ounces both measure volume from the same zero, so a single multiplier does the job.
fl oz = cup × 8
Going the other way? Convert US fluid ounces to US cups.
US cups to US fluid ounces table
Common values, rounded for reading.
| US cups (cup) | US fluid ounces (fl oz) |
|---|---|
| 1 | 8 |
| 2 | 16 |
| 3 | 24 |
| 4 | 32 |
| 5 | 40 |
| 6 | 48 |
| 7 | 56 |
| 8 | 64 |
| 9 | 72 |
| 10 | 80 |
| 15 | 120 |
| 20 | 160 |
| 25 | 200 |
| 30 | 240 |
| 40 | 320 |
| 50 | 400 |
| 75 | 600 |
| 100 | 800 |
| 250 | 2,000 |
| 500 | 4,000 |
| 1,000 | 8,000 |
Questions people ask
- How many US fluid ounces are in a US cup?
- One US cup equals 8 US fluid ounces.
- How do I convert US cups to US fluid ounces by hand?
- Multiply the number of US cups by 8. For a rough check, 8 is close enough for most everyday use.
- What is 1 US cup in US fluid ounces?
- 1 US cup is 8 US fluid ounces.
Calcuit generates this page from a unit table, so the factors here match every other page on the site.