Convert Cups to Fluid ounces
Cups to fluid ounces — the exact ratio, a worked example and a live converter, all in your browser.
Result
Cups to Fluid ounces formula
This is a fixed ratio — it's the same for every ingredient:
fluid ounces = cups × 8
Worked example
1 cup = 8 fluid ounces.
Cups to Fluid ounces conversion table
| Cups | Fluid ounces |
|---|---|
| 0.25 | 2 |
| 0.5 | 4 |
| 1 | 8 |
| 2 | 16 |
| 4 | 32 |
| 8 | 64 |
Common uses
Common for drinks and liquid ingredients, where American recipes switch freely between cups and fluid ounces.
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Frequently asked questions
What is the formula to convert cups to fluid ounces?
Multiply the number of cups by 8 (fluid ounces = cups × 8). This ratio is fixed — it doesn't depend on the ingredient.
How many fluid ounces are in a cup?
One cup equals 8 fluid ounces (US customary sizes).
Which cup and spoon sizes does this use?
US customary sizes: 1 cup = 236.6 ml = 16 tablespoons = 48 teaspoons = 8 fluid ounces. Metric and imperial cups differ slightly.