Fluid Ounces to Cups Converter
Convert US fluid ounces (fl oz) to US cups (cups) instantly. Type a value — the result updates as you type, and the swap button converts the other way.
Fluid Ounces to Cups formula
cups = fl oz ÷ 8
1 US fluid ounce = 0.125 US cups · 1 US cup = 8 US fluid ounces
To convert US fluid ounces to US cups, divide the value by 8. For example, 12 fl oz:
cups = 12 ÷ 8cups = 1.5
So 12 fl oz = 1.5 cups.
Mental math shortcut
This conversion is exact, so there is no need to estimate: just divide by 8.
Fluid Ounces to Cups conversion table
Cups back to Fluid Ounces
The same values converted the other way, rounded for everyday use:
| US cups | US fluid ounces |
|---|---|
| 0.125 cups | 1 fl oz |
| 0.25 cups | 2 fl oz |
| 0.5 cups | 4 fl oz |
| 0.75 cups | 6 fl oz |
| 1 cups | 8 fl oz |
| 1.25 cups | 10 fl oz |
| 1.5 cups | 12 fl oz |
| 2 cups | 16 fl oz |
About the units
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.)
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.
Frequently asked questions
How many US cups are in a US fluid ounce?
One US fluid ounce equals 0.125 US cups.
What is 12 Fluid Ounces in Cups?
12 fl oz = 1.5 cups.
How do I convert Cups back to Fluid Ounces?
Multiply the US cups by 8. Or use the Cups to Ounces converter.