Fluid Ounce (US) to Cup (US) Converter
Convert Fluid Ounce (US) (fl oz) to Cup (US) (cup) instantly. 1 fl oz = 0.125 cup.
Volume Converter
40 units available
1 fl oz = 0.125 cup
Formula:
cup = fl oz × 0.125With your value: 1 fl oz = 0.125 cup
How big is that?
Everyday references on a logarithmic scale, all expressed in fluid ounce (us) so you can sanity-check the result.
Other Fluid Ounce (US) to Cup (US) conversions
Fluid Ounce (US) to Cup (US) Conversion Table
| Fluid Ounce (US) (fl oz) | Cup (US) (cup) |
|---|---|
| 0.5 | 0.0625 |
| 1 | 0.125 |
| 2 | 0.25 |
| 5 | 0.625 |
| 10 | 1.25 |
| 15 | 1.875 |
| 20 | 2.5 |
| 25 | 3.125 |
| 50 | 6.25 |
| 100 | 12.5 |
| 250 | 31.25 |
| 500 | 62.5 |
| 1000 | 125 |
Cup (US) to Fluid Ounce (US) Conversion Table
| Cup (US) (cup) | Fluid Ounce (US) (fl oz) |
|---|---|
| 0.5 | 4 |
| 1 | 8 |
| 2 | 16 |
| 5 | 40 |
| 10 | 80 |
| 15 | 120 |
| 20 | 160 |
| 25 | 200 |
| 50 | 400 |
| 100 | 800 |
| 250 | 2,000 |
| 500 | 4,000 |
| 1000 | 8,000 |
Where these values come from
Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.
Fluid Ounce (US) (fl oz)
Volume
Derived from the cubic metre. The litre is exactly 10⁻³ m³; US and imperial capacity units are exact multiples fixed by statute.
Source: NIST Special Publication 811, Guide for the Use of the International System of Units
National Institute of Standards and Technology (US) · Reviewed 2026-07-01
Cup (US) (cup)
Volume
Derived from the cubic metre. The litre is exactly 10⁻³ m³; US and imperial capacity units are exact multiples fixed by statute.
Source: NIST Special Publication 811, Guide for the Use of the International System of Units
National Institute of Standards and Technology (US) · Reviewed 2026-07-01
How to Convert Fluid Ounce (US) to Cup (US)
To convert from Fluid Ounce (US) (fl oz) to Cup (US) (cup), multiply the value by 0.125.
Formula: cup = fl oz × 0.125
Reverse: fl oz = cup × 8
Step-by-Step Example
- Start with your value in Fluid Ounce (US). For example: 5 fl oz
- Multiply by the conversion factor: 5 x 0.125
- The result is: 0.625 cup
About Fluid Ounce (US)
The US fluid ounce equals approximately 29.57 mL. It is commonly used for beverage and liquid measurements.
Common uses: beverages, cooking, cocktails.
About Cup (US)
The US cup equals approximately 236.6 mL and is a standard cooking measurement in the United States.
Common uses: baking, cooking, recipes.
Frequently Asked Questions
How many Cup (US) are in 1 Fluid Ounce (US)?
There are exactly 0.125 Cup (US) in 1 Fluid Ounce (US). This means the conversion factor from Fluid Ounce (US) to Cup (US) is 0.125.
What is the formula to convert Fluid Ounce (US) to Cup (US)?
The formula to convert Fluid Ounce (US) to Cup (US) is: cup = fl oz × 0.125. For example, to convert 10 Fluid Ounce (US) to Cup (US), you would multiply 10 by 0.125.
What is a Fluid Ounce (US)?
The US fluid ounce equals approximately 29.57 mL. It is commonly used for beverage and liquid measurements.
What is a Cup (US)?
The US cup equals approximately 236.6 mL and is a standard cooking measurement in the United States.
What are the common uses of Fluid Ounce (US)?
The Fluid Ounce (US) is commonly used in beverages, cooking, cocktails.
Related Volume Conversions
Cite this page
UnitConvertLab. (2026). Fluid Ounce (US) to Cup (US) converter. UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/fluid_ounce_us-to-cup_us