Baking Conversions
How Many Ounces in a Cup?
1 US customary cup (237 mL) equals exactly 8 fluid ounces for liquids.
Quick Answer
8 fluid ounces
cup = fluid ounces
Conversion Table
| cup | fluid ounces | Note |
|---|---|---|
| 1/4 cup | 2 fl oz | Liquid |
| 1/3 cup | 2.67 fl oz | Liquid |
| 1/2 cup | 4 fl oz | Liquid |
| 2/3 cup | 5.33 fl oz | Liquid |
| 3/4 cup | 6 fl oz | Liquid |
| 1 cup | 8 fl oz | Standard |
Alternative Conversions
Flour (by weight)
1 cup ≈ 4.4 oz
Sugar (by weight)
1 cup ≈ 7 oz
Butter (by weight)
1 cup = 8 oz
Frequently Asked Questions
Is 8 oz the same as 1 cup?
Yes, for liquids. 8 fluid ounces equals exactly 1 cup. However, for dry ingredients, 8 ounces by weight is different from 1 cup by volume.
How many ounces is 1/4 cup?
1/4 cup equals 2 fluid ounces for liquids.
Is a cup 6 or 8 oz?
A US cup is 8 fluid ounces. However, some coffee makers use a 6 oz "cup" measurement, which can cause confusion.