US fluid ounces to US cups
Type a value in US fluid ounces and get the result in US cups, calculated exactly.
1 US fluid ounces = 0.125 US cups
Precision
Exact factorThis result is exact.
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Formula
cup (US) = fl oz (US) × 0.125
To convert US fluid ounces to US cups, multiply the value by 0.125.
Worked examples
- 1 fl oz (US) × 0.125 = 0.125 cup (US)
- 100 fl oz (US) × 0.125 = 12.5 cup (US)
- 50 fl oz (US) × 0.125 = 6.25 cup (US)
This factor is exact by definition.
Conversion table
| US fluid ounces (fl oz (US)) | US cups (cup (US)) |
|---|---|
| 0.25 | 0.03125 |
| 0.5 | 0.0625 |
| 0.75 | 0.09375 |
| 1 | 0.125 |
| 1.5 | 0.1875 |
| 2 | 0.25 |
| 2.5 | 0.3125 |
| 3 | 0.375 |
| 4 | 0.5 |
| 5 | 0.625 |
| 6 | 0.75 |
| 8 | 1 |
| 10 | 1.25 |
Values marked ≈ are rounded; the rest are exact.
Reverse table: US cups to US fluid ounces
| US cups (cup (US)) | US fluid ounces (fl oz (US)) |
|---|---|
| 0.25 | 2 |
| 0.5 | 4 |
| 0.75 | 6 |
| 1 | 8 |
| 1.5 | 12 |
| 2 | 16 |
| 2.5 | 20 |
| 3 | 24 |
| 4 | 32 |
| 5 | 40 |
| 6 | 48 |
| 8 | 64 |
| 10 | 80 |
Unit definitions
- US fluid ounces fl oz (US)
- One eighth of a US cup: exactly 29.5735295625 mL.
- US cups cup (US)
- The US customary cup: one sixteenth of a US gallon, exactly 236.5882365 mL.
Questions people ask
US fluid ounces to US cups: what is the conversion factor?
One fl oz (US) is 0.125 cup (US).
How do I convert US fluid ounces to US cups?
Use the formula above. For example, 100 fl oz (US) = 12.5 cup (US).
Is the conversion exact?
Yes. Both units have exact definitions, so the factor is exact; a result is only rounded when its decimals never end.
Factors checked 19 October 2026.