To convert fluid ounces to cups, divide by 8. So 8 fl oz = 1 cup, 4 fl oz = 0.5 cups, and 16 fl oz = 2 cups (1 pint). This is exact: 1 US cup = 8 US fl oz by definition.
- Exact formula: cups = fl oz ÷ 8. 1 cup = 8 fl oz exactly.
- 4 fl oz = 1/2 cup. 8 fl oz = 1 cup. 12 fl oz = 1.5 cups. 16 fl oz = 2 cups (1 pint).
- Quick check: a standard US 12 oz can is 1.5 cups. A 32 oz bottle is 4 cups (1 quart).
- Reverse: fl oz = cups × 8.
How to use our fl oz to cups converter
Type any fl oz value in the fl oz field and the cup result appears instantly. Both directions work without pressing a button.
How do you convert fl oz to cups?
Divide the number of fluid ounces by 8. The US cup is defined as 8 fl oz, so this is an exact whole-number conversion for even fl oz values, and a simple decimal for odd values.
$$\text{cups} = \text{fl oz} \div 8$$
Worked examples: 2 fl oz = 0.25 cups (1/4). 4 fl oz = 0.5 cups (1/2). 6 fl oz = 0.75 cups (3/4). 8 fl oz = 1 cup. 12 fl oz = 1.5 cups. 16 fl oz = 2 cups. 32 fl oz = 4 cups.
Fluid ounces to cups reference table
Standard fl oz values converted to cups, with cup fraction and volume context:
| Fluid Ounces | Cups | Context |
|---|---|---|
| 1 fl oz | 0.125 (1/8) | 2 tablespoons |
| 2 fl oz | 0.25 (1/4) | 4 tablespoons |
| 4 fl oz | 0.5 (1/2) | Half cup |
| 6 fl oz | 0.75 (3/4) | Three-quarter cup |
| 8 fl oz | 1 cup | Standard cup |
| 10 fl oz | 1.25 cups | Large glass |
| 12 fl oz | 1.5 cups | Standard US can |
| 16 fl oz | 2 cups | 1 pint |
| 24 fl oz | 3 cups | Large water bottle |
| 32 fl oz | 4 cups | 1 quart |
| 64 fl oz | 8 cups | Half gallon |
FAQs about fl oz to cups conversion
How many cups is 8 fl oz?
8 fl oz equals exactly 1 cup. 8 ÷ 8 = 1. The cup is defined as 8 fl oz in the US customary system.
How many cups is 12 fl oz?
12 fl oz equals 1.5 cups. 12 ÷ 8 = 1.5 cups. A standard 12 fl oz US can holds 1.5 cups of liquid.
How many cups is 16 fl oz?
16 fl oz equals 2 cups. 16 ÷ 8 = 2 cups. 16 fl oz is also 1 US pint.
How many cups is 32 fl oz?
32 fl oz equals 4 cups. 32 ÷ 8 = 4 cups. 32 fl oz is also 1 US quart or 2 pints.