oz to Cups Converter
8 fluid ounces equals 1 cup, so 12 oz is 1.5 cups and 4 oz is half a cup. This converter switches between US fluid ounces, cups, tablespoons, teaspoons, and milliliters. Use it to scale a recipe, read an American cookbook, or split a drink measure without guessing.
Quick answer
There are 8 fluid ounces in 1 US cup.
Result
1.5 cups
What this tells you
- •There are 8 fluid ounces in 1 US cup.
- •1 cup is also 16 tablespoons or 48 teaspoons.
- •To convert oz to cups, divide by 8.
- •These are volume ounces, not weight ounces.
How to Use
- 1Enter the amount you want to convert.
- 2Choose the unit you are converting from.
- 3Choose the unit you are converting to.
- 4Read the converted amount below.
How It Works
Formula
cups = fl oz / 8Divide fluid ounces by 8 to get US cups, since the US customary cup is defined as 8 fluid ounces. Tablespoons and teaspoons chain off the same base: 1 fl oz is 2 tablespoons and 6 teaspoons. In metric, 1 fl oz is 29.574 ml.
Calculation note: values are processed in the order shown above, using the current input units.
Worked Examples
Convert 12 fl oz to cups
Divide 12 by 8 to get 1.5 cups.
Convert 2 cups to fl oz
Multiply 2 by 8 to get 16 fluid ounces.
Fluid Ounces to Cups Conversions
Common kitchen measures.
| Fluid ounces | Cups | Tablespoons |
|---|---|---|
| 1 fl oz | 1/8 cup | 2 tbsp |
| 2 fl oz | 1/4 cup | 4 tbsp |
| 4 fl oz | 1/2 cup | 8 tbsp |
| 6 fl oz | 3/4 cup | 12 tbsp |
| 8 fl oz | 1 cup | 16 tbsp |
| 12 fl oz | 1.5 cups | 24 tbsp |
| 16 fl oz | 2 cups | 32 tbsp |
| 32 fl oz | 4 cups | 64 tbsp |
Common mistakes
- Mixing up fluid ounces and weight ounces. A cup of flour weighs about 4.25 oz but measures 8 fl oz of volume.
- Using the UK cup or imperial fluid ounce. The UK fluid ounce is 28.41 ml, about 4 percent smaller than the US one.
- Assuming a coffee cup or mug is 1 cup. Mugs typically hold 10 to 14 fl oz.