Cups to Fluid ounces
Convert cups (cup) to fluid ounces (fl oz). 1 cup = 8 fl oz (and 1 fl oz = 0.125 cup). It all runs locally in your browser.
Cups to Fluid ounces table
| Cups | Fluid ounces |
|---|---|
| 0.5 cup | 4 fl oz |
| 1 cup | 8 fl oz |
| 2 cup | 16 fl oz |
| 3 cup | 24 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 |
Where this conversion shows up
American baking, where recipes mix cups and fluid ounces freely and a measuring jug is usually marked in both. Useful for scaling a recipe up or down without a calculator.
Worked example
1 cup is exactly 8 fl oz, so a recipe needing 1½ cups of stock is 12 fl oz. A standard 16 fl oz US pint is therefore exactly two cups.
Rounding and precision
This one is exact and easy: multiply cups by 8. The trap is dry ingredients — a cup of flour is a volume, not a weight, and can vary by 20% depending on how it is packed.
How to convert
To convert cups to fluid ounces, multiply by 8. Need other units? Use the full Unit Converter.
FAQ
How many fluid ounces in a cup?
1 cup equals 8 fluid ounces (fl oz).
How do I convert cups to fluid ounces?
Multiply the cups value by 8. For example, 5 cup = 40 fl oz.
How many fluid ounces in a cup?
Exactly 8 in US measure. A pint is 2 cups (16 fl oz) and a quart is 4 cups (32 fl oz).
Is a cup of flour 8 ounces?
No — that confuses volume with weight. A cup of flour is 8 fluid ounces of volume but weighs about 4.25 ounces, which is why baking recipes increasingly give grams.