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Cups to fluid ounces
1 US cup = 8 fluid ounces. This is volume (fl oz), not weight. Convert below.
Fluid ounces8.0fluid ounces
Cups to fluid ounces chart
| Cups | Fluid ounces |
|---|---|
| 1 cup | 8 fl oz |
| ¾ cup | 6 fl oz |
| ½ cup | 4 fl oz |
| ¼ cup | 2 fl oz |
Fluid ounces ≠ weight ounces. 1 cup of water is 8 fl oz and happens to weigh about 8 oz, but 1 cup of flour is still 8 fl oz yet weighs only ~4.4 oz. For weight, see cups to grams.
Frequently asked questions
How many ounces in a cup?
A US cup is 8 fluid ounces by volume.
Is a cup 8 oz by weight?
Only for water. Fluid ounces measure volume; the weight in ounces depends on the ingredient.