Fluid ounces to Cups (US) Converter
Convert fluid ounces (fl oz) to cups (US) (cup) instantly. Type a value above and the result updates while you type. 1 fluid ounce equals 0.125 cups (US).
Result updates as you type. Values are calculated locally in your browser — nothing is sent to a server.
The formula
1 fluid ounce = 0.125 cups (US)
Multiply the fluid ounces value by 0.125 to get cups (US). Or divide by 8 to go the other way.
Fluid ounces to cups (US) conversion table
| fl oz | cup |
|---|---|
| 1 | 0.125 |
| 2 | 0.25 |
| 3 | 0.375 |
| 4 | 0.5 |
| 5 | 0.625 |
| 6 | 0.75 |
| 7 | 0.875 |
| 8 | 1 |
| 9 | 1.125 |
| 10 | 1.25 |
| 15 | 1.875 |
| 20 | 2.5 |
| 25 | 3.125 |
| 50 | 6.25 |
| 75 | 9.375 |
| 100 | 12.5 |
Worked examples
- 4 fl oz × 0.125 = 0.5 cup
- 8 fl oz × 0.125 = 1 cup
- 16 fl oz × 0.125 = 2 cup
Conversion factors follow the exact international definitions (SI/BIPM; imperial units per the 1959 International Yard and Pound Agreement, maintained by NIST). NIST unit conversion reference
Factors last verified August 2026 · Built by Jeffrey Tepper.
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Frequently asked questions
How many cups (US) are in 1 fluid ounce?
1 fluid ounce equals 0.125 cups (US) (fl oz → cup).
How do you convert fluid ounces to cups (US)?
Multiply the number of fluid ounces by 0.125. For example: 10 fl oz × 0.125 = 1.25 cup.
What is 50 fl oz in cup?
50 fl oz equals 6.25 cup.
Which is bigger: 1 fluid ounce or 1 cup (US)?
1 cup (US) is bigger: 1 fluid ounce is only 0.125 cups (US).