ToolNestCups to Fluid Ounces Converter
Convert cups to fluid ounces instantly with our free volume converter. 1 cup = 8 fl oz — type any value below and the result updates live.
Cups → Fluid Ounces⇄ Swap: Fluid Ounces → Cups
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Cups to Fluid Ounces Formula
Fluid Ounces = Cups × 8 (Cups = Fluid Ounces × 0.125)
Volume conversion for cooking, fuel, and engineering — metric liters and milliliters alongside US customary gallons, quarts, pints, cups, and fluid ounces.
Cups to Fluid Ounces Conversion Table
| Cups | Fluid Ounces | |
|---|---|---|
| 1 cup | = | 8 fl oz |
| 2 cup | = | 16 fl oz |
| 5 cup | = | 40 fl oz |
| 10 cup | = | 80 fl oz |
| 25 cup | = | 200 fl oz |
| 50 cup | = | 400 fl oz |
| 100 cup | = | 800 fl oz |
About Cups and Fluid Ounces
A US customary cup is 8 fluid ounces (236.588 ml) — the backbone of American recipes and baking measurements.
A US fluid ounce is 1/128 of a US gallon (29.5735 ml). The unit for drink servings, bottles, and small liquid measures.
Frequently Asked Questions
How many fluid ounces are in one cup?
One cup equals 8 fluid ounces. Multiply any cups value by 8 to convert it.
What is the formula for converting cups to fluid ounces?
Fluid Ounces = Cups × 8. To reverse it: cups = fluid ounces × 0.125.
How do I convert fluid ounces back to cups?
Divide the fluid ounces value by 8 (equivalently, multiply by 0.125). Or use our fluid ounces-to-cups converter going the other way.
Which is bigger, a cup or a fluid ounce?
A cup is bigger — one cup equals 8 fluid ounces.