Cups to Fluid ounces
1 cup = 8.12 fluid ounces
A US cup is defined as 8 fluid ounces, so for everyday cooking 1 cup = 8 fl oz, ½ cup = 4 fl oz and ¼ cup = 2 fl oz. (Using the 240 ml cup this site assumes, the exact figure is about 8.12 fl oz, but 8 is what recipes intend.) Note this is the US fluid ounce; a UK/imperial fluid ounce is slightly smaller, so an imperial pint of 20 fl oz is not the same as a US pint of 16.
Cups to Fluid ounces table
| Cups | Fluid ounces |
|---|---|
| 0.25 cups | 2.03 fluid ounces |
| 0.5 cups | 4.06 fluid ounces |
| 1 cup | 8.12 fluid ounces |
| 2 cups | 16.2 fluid ounces |
| 3 cups | 24.3 fluid ounces |
| 4 cups | 32.5 fluid ounces |
| 5 cups | 40.6 fluid ounces |
| 6 cups | 48.7 fluid ounces |
| 8 cups | 64.9 fluid ounces |
| 10 cups | 81.2 fluid ounces |
| 12 cups | 97.4 fluid ounces |
| 14 cups | 114 fluid ounces |
| 16 cups | 130 fluid ounces |
| 18 cups | 146 fluid ounces |
| 20 cups | 162 fluid ounces |
| 24 cups | 195 fluid ounces |
| 32 cups | 260 fluid ounces |
How to convert cups to fluid ounces
To convert cups to fluid ounces, multiply by 8.12. This is a volume conversion, so it applies to any liquid or dry ingredient measured by volume, water, oil, milk, flour, and more.
Common conversions: 2 cups = 16.2 fluid ounces · 4 cups = 32.5 fluid ounces · 8 cups = 64.9 fluid ounces · 16 cups = 130 fluid ounces.
Tip: Fluid ounces measure volume, not weight — don't confuse them with the dry ounces on a scale. A cup of honey is 8 fluid ounces but weighs far more than 8 dry ounces.
For ingredient-specific weight conversions (like cups to grams of flour or rice), see our ingredient converters.
Cups to Fluid ounces: frequently asked
How many ounces in a cup?
A US cup is 8 fluid ounces by volume.
Is a cup 8 oz of weight?
Only for water-like liquids. Fluid ounces measure volume; the weight in dry ounces depends entirely on the ingredient.