Cups to Ounces Converter
Convert US cups (cups) to US fluid ounces (fl oz) instantly. Type a value — the result updates as you type, and the swap button converts the other way.
Cups to Ounces formula
fl oz = cups × 8
1 US cup = 8 US fluid ounces · 1 US fluid ounce = 0.125 US cups
To convert US cups to US fluid ounces, multiply the value by 8. For example, 2 cups:
fl oz = 2 × 8fl oz = 16
So 2 cups = 16 fl oz.
Mental math shortcut
This conversion is exact, so there is no need to estimate: just multiply by 8.
Cups to Ounces conversion table
Ounces back to Cups
The same values converted the other way, rounded for everyday use:
| US fluid ounces | US cups |
|---|---|
| 2 fl oz | 0.25 cups |
| 2.64 fl oz | 0.33 cups |
| 4 fl oz | 0.5 cups |
| 6 fl oz | 0.75 cups |
| 8 fl oz | 1 cups |
| 12 fl oz | 1.5 cups |
| 16 fl oz | 2 cups |
| 24 fl oz | 3 cups |
About the units
US cups (cups)
A US customary cup is 8 US fluid ounces, about 236.6 ml. Nutrition labels use a rounded 240 ml cup; metric cups are 250 ml.
US fluid ounces (fl oz)
A US fluid ounce is 1/128 of a US gallon, about 29.57 ml. (A UK imperial fluid ounce is slightly smaller, 28.41 ml.)
Frequently asked questions
How many US fluid ounces are in a US cup?
One US cup equals 8 US fluid ounces.
What is 2 Cups in Ounces?
2 cups = 16 fl oz.
How do I convert Ounces back to Cups?
Divide the US fluid ounces by 8. Or use the Fluid Ounces to Cups converter.