Cups to fluid ounces
1 cup = 8 fluid ounces
For any other value: fl oz = cups × 8
Calculator
8 fl oz
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You can leave the unit in: 100 cups is fine.
Cups to fluid ounces chart
The values people look up most.
| cups | fluid ounces |
|---|---|
| 1 cup | 8 fl oz |
| 8 cups | 64 fl oz |
| 2 cups | 16 fl oz |
| 16 cups | 128 fl oz |
| 4 cups | 32 fl oz |
| 3 cups | 24 fl oz |
| 0.5 cups | 4 fl oz |
| 0.75 cups | 6 fl oz |
| 1/3 cup | 2.67 fl oz |
| 11 cups | 88 fl oz |
| 12 cups | 96 fl oz |
| 6 cups | 48 fl oz |
| 2/3 cup | 5.33 fl oz |
| 5 cups | 40 fl oz |
| 3.5 cups | 28 fl oz |
| 2.5 cups | 20 fl oz |
| 0.125 cups | 1 fl oz |
| 1.5 cups | 12 fl oz |
| 9 cups | 72 fl oz |
| 0.375 cups | 3 fl oz |
| 7 cups | 56 fl oz |
| 1.75 cups | 14 fl oz |
| 10 cups | 80 fl oz |
| 0.25 cups | 2 fl oz |
| 11.5 cups | 92 fl oz |
| 20 cups | 160 fl oz |
| 15.5 cups | 124 fl oz |
| 1.25 cups | 10 fl oz |
| 4.5 cups | 36 fl oz |
| 15 cups | 120 fl oz |
Formula
fl oz = cups × 8
A US cup is always 8 fluid ounces, because both measure volume. Its WEIGHT in ounces is a different question and depends on what is in the cup — a cup of flour weighs about 4.4 oz and a cup of sugar about 7 oz.
Where this number comes from
This factor is exact, not rounded. Eight fluid ounces to a US cup, by definition.
Source: NIST Guide to the SI, Appendix B: Conversion Factors, NIST (National Institute of Standards and Technology, USA).
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