Fluid Ounce (US) to Cup (US)Converter
Instantly convert Fluid Ounce (US) (fl oz) to Cup (US) (cup). Free, accurate, and easy to use.
How to Convert Fluid Ounce (US) to Cup (US)
To convert Fluid Ounce (US) (fl oz) to Cup (US) (cup), multiply your value by 0.125.
Example: 5 fl oz × 0.125 = 0.625 cup
What is a Fluid Ounce (US)?
The US fluid ounce equals approximately 29.574 milliliters, or 1/128 of a US gallon. Despite sharing a name with the mass unit ounce, it measures only volume. The UK imperial fluid ounce differs, equaling 28.413 mL (1/160 of an imperial gallon). There are 8 US fluid ounces in a cup and 128 in a gallon.
What is a Cup (US)?
The US cup equals exactly 8 US fluid ounces or approximately 236.588 milliliters. It is the foundation of most American baking recipes and is measured with standardized cup-shaped tools. The metric cup used in some countries equals 250 mL. There are 2 cups in a US pint, 4 in a quart, and 16 in a gallon.
Fluid Ounce (US) to Cup (US) Conversion Table
| Fluid Ounce (US) (fl oz) | Cup (US) (cup) |
|---|---|
| 0.001 fl oz | 0.000125 cup |
| 0.01 fl oz | 0.00125 cup |
| 0.1 fl oz | 0.0125 cup |
| 0.5 fl oz | 0.0625 cup |
| 1 fl oz | 0.125 cup |
| 2 fl oz | 0.25 cup |
| 5 fl oz | 0.625 cup |
| 10 fl oz | 1.25 cup |
| 20 fl oz | 2.5 cup |
| 50 fl oz | 6.25 cup |
| 100 fl oz | 12.5 cup |
| 200 fl oz | 25 cup |
| 500 fl oz | 62.5 cup |
| 1000 fl oz | 125 cup |
| 5000 fl oz | 625 cup |
| 10000 fl oz | 1250 cup |
| 50000 fl oz | 6250 cup |
| 100000 fl oz | 12500 cup |
| 1000000 fl oz | 125000 cup |
| 1000000000 fl oz | 125000000 cup |
Frequently Asked Questions
How do I convert Fluid Ounce (US) to Cup (US)?
Multiply the Fluid Ounce (US) value by 0.125. Formula: cup = fl oz × 0.125. Example: 10 fl oz = 1.25 cup.
How many Cup (US) are in one Fluid Ounce (US)?
One Fluid Ounce (US) (fl oz) equals 0.125 Cup (US) (cup).
How many Fluid Ounce (US) are in one Cup (US)?
One Cup (US) (cup) equals 8 Fluid Ounce (US) (fl oz).
What is the exact conversion factor from Fluid Ounce (US) to Cup (US)?
The conversion factor is 0.125. Multiply any fl oz value by this number to get cup. For the reverse, multiply by 8.
How do I convert Cup (US) back to Fluid Ounce (US)?
Divide by 0.125, or equivalently multiply by 8. Formula: fl oz = cup ÷ 0.125.
Is the Fluid Ounce (US)-to-Cup (US) conversion internationally standardized?
Yes. Both units are defined by international standards (SI or the international yard/pound agreement), so the conversion factor 0.125 is exact and universally agreed upon.