Fluid Ounce to Cup Converter
Convert fluid ounces to cups (fl oz to cup) instantly with this free online volume converter. Enter any value in the Fluid Ounce field and get the equivalent in Cup immediately. This converter handles any quantity — from tiny fractions to large numbers — with full precision. No signup, no ads in the widget, and the conversion runs entirely in your browser for instant results.
The conversion factor is exact: 1 fl oz = 0.125 cup. To convert fluid ounces to cups, multiply your Fluid Ounce value by 0.125. For example, 10 fl oz = 1.25 cup. You can also reverse the calculation: 1 cup = 8 fl oz.
Quick conversion table
| Fluid Ounce (fl oz) | Cup (cup) |
|---|---|
| 1 fl oz | 0.125 cup |
| 5 fl oz | 0.625 cup |
| 10 fl oz | 1.25 cup |
| 25 fl oz | 3.125 cup |
| 50 fl oz | 6.25 cup |
| 100 fl oz | 12.5 cup |
Use the swap button to reverse the direction, or choose a different unit from the dropdown menus to convert within the volume category.
Formula
Fluid Ounce to Cup conversion: 1 fl oz = 0.125 cup cups = fluid ounces × 0.125 1 cup = 8 fl oz fluid ounces = cups × 8
Example
Example: Convert 10 fl oz to cup: 10 fl oz × 0.125 = 1.25 cup So, 10 fl oz is about 1.25 cup. To convert back, multiply by 8: 1.25 cup × 8 = 10 fl oz.
How to Use
- Enter the value you want to convert in the Fluid Ounce field
- The result in Cup appears instantly below
- Use the dropdown menus to change units if needed
- Click 'Swap Units' to reverse the conversion direction
- Copy the result or adjust the input for a new conversion
Frequently Asked Questions
How do I convert fluid ounces to cups?
Enter the value in Fluid Ounce (fl oz) in the 'From' field. The equivalent in Cup (cup) appears instantly in the 'To' field. The converter uses precise conversion factors and updates in real time as you type.
What is the formula to convert fl oz to cup?
1 fl oz = 0.125 cup, so cups = fluid ounces × 0.125. To convert back, 1 cup = 8 fl oz. The full formula and a worked example are shown on this page.
How many cups are in one Fluid Ounce?
1 fl oz = 0.125 cup.
Is this Fluid Ounce to Cup converter free?
Yes, completely free with no signup, no limits, and no ads in the converter widget. You can convert as many values as you need. The tool runs entirely in your browser, so your data never leaves your device.
Can I convert cups back to fluid ounces?
Yes. Click the 'Swap Units' button to reverse the direction. You can also use the dropdown menus to select any other volume unit for either field.
How accurate is the fl oz to cup conversion?
The converter uses high-precision conversion factors (up to 8 decimal places). Results are displayed with up to 6 decimal places, with trailing zeros removed for readability. For scientific or engineering work, always verify with official standards.