Volume converter
US cup to Fluid ounce Converter
Convert cup to fl oz or reverse with one click. Type a value below for an instant result.
US cup cup
Fluid ounce fl oz
cup → fl oz · runs in your browser, no server
How to convert us cup to fluid ounce
US cup (cup) and Fluid ounce (fl oz) both measure volume. Whether you are studying, traveling, cooking, or working on a project, converting between them should be fast and accurate.
Looking for the opposite direction? See our dedicated fluid ounce to us cup converter — same formula reversed, with content written for that direction.
The standard relationship used on this page means that 1 us cup equals 8 fl oz. Enter any number in the calculator — use the swap button to reverse the direction without leaving the page.
Converting 2 cup gives 16 fl oz. This is a practical reference when switching between us cup and fluid ounce for cooking measurements, fuel economy context, and liquid packaging.
Need fluid ounce to us cup instead? Try our Fluid ounce to US cup converter. floz → cup
cup to fl oz conversion table
| cup | fl oz |
|---|---|
| 1 | 8 |
| 2 | 16 |
| 4 | 32 |
| 8 | 64 |
| 16 | 128 |
| 32 | 256 |
| 64 | 512 |
fl oz to cup conversion table
Or click the swap button in the converter to switch from fl oz to cup.
| fl oz | cup |
|---|---|
| 1 | 0.125 |
| 2 | 0.25 |
| 4 | 0.5 |
| 8 | 1 |
| 16 | 2 |
| 32 | 4 |
| 64 | 8 |
Frequently asked questions
How many fluid ounces are in 1 us cup? +
One us cup equals 8 fl oz. Use the converter above for any value — results are calculated locally with full precision.
How do I convert cup to fl oz? +
Use the formula: fl oz = cup × 8. Enter your value in the calculator and the result appears instantly. Click the swap button to convert fl oz back to cup.
How many us cups are in 1 fluid ounce? +
One fluid ounce equals 0.125 cup. Swap the converter direction to work backwards from fl oz to cup.
What is 10 cup in fl oz? +
10 cup is 80 fl oz. See the conversion table on this page for more common values.
When would I convert us cup to fluid ounce? +
This conversion is useful for cooking measurements, fuel economy context, and liquid packaging. ConvertHub runs entirely in your browser — no data is uploaded to any server.
Is us cup to fluid ounce the same as fluid ounce to us cup? +
They are inverse operations. This page focuses on cup → fl oz with examples and tables for that direction. For fl oz → cup, use our separate fluid ounce to us cup converter page.