Direct conversion
Convert cup (US) [cup US] to fluid ounce (US) [fl oz US] instantly with formula, examples, chart, and FAQs.
1 cup (US) [cup US] = 8 fluid ounce (US) [fl oz US]
1 cup (US) [cup US] = 8 fluid ounce (US) [fl oz US]
Example: 1 cup (US) [cup US] equals 8 fluid ounce (US) [fl oz US].
Volume conversions use cubic metre as the reference unit. US liquid units, metric litres, and cubic units are converted with fixed factors stored in the unit table.
Displayed results are rounded for readability. The calculator keeps enough precision for everyday use and switches to scientific notation for very large or very small values. Last reviewed: 2026-05-21.
The US cup is a cooking volume unit equal to 236.5882365 milliliters.
HistoryCup measures developed from household cooking measures and were standardized for recipes.
Current useUS cups are used in recipes, nutrition labels, baking, meal preparation, and kitchen measuring tools.
The US fluid ounce is a liquid volume unit equal to 29.5735295625 milliliters.
HistoryFluid ounces developed from customary liquid measures and differ from imperial fluid ounces.
Current useUS fluid ounces are used for beverages, medicine labels, recipes, cosmetics, and packaged liquids.
| cup (US) [cup US] | fluid ounce (US) [fl oz US] |
|---|---|
| 1 | 8 |
| 2 | 16 |
| 5 | 40 |
| 10 | 80 |
| 20 | 160 |
| 25 | 200 |
| 50 | 400 |
| 100 | 800 |
| 1000 | 8000.000001 |
Use this formula: 1 cup (US) [cup US] = 8 fluid ounce (US) [fl oz US] Enter your value in the calculator and the result updates instantly.
1 cup (US) [cup US] equals 8 fluid ounce (US) [fl oz US].
Yes. Use the swap button in the calculator or open the related reverse conversion link when it is listed on this page.