Cup to Fluid Ounce Converter
Convert cups to fluid ounces (cup to fl oz) instantly with this free online volume converter. Enter any value in the Cup field and get the equivalent in Fluid Ounce 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 cup = 8 fl oz. To convert cups to fluid ounces, multiply your Cup value by 8. For example, 10 cup = 80 fl oz. You can also reverse the calculation: 1 fl oz = 0.125 cup.
Quick conversion table
| Cup (cup) | Fluid Ounce (fl oz) |
|---|---|
| 1 cup | 8 fl oz |
| 5 cup | 40 fl oz |
| 10 cup | 80 fl oz |
| 25 cup | 200 fl oz |
| 50 cup | 400 fl oz |
| 100 cup | 800 fl oz |
Use the swap button to reverse the direction, or choose a different unit from the dropdown menus to convert within the volume category.
Formula
Cup to Fluid Ounce conversion: 1 cup = 8 fl oz fluid ounces = cups × 8 1 fl oz = 0.125 cup cups = fluid ounces × 0.125
Example
Example: Convert 10 cup to fl oz: 10 cup × 8 = 80 fl oz So, 10 cup is about 80 fl oz. To convert back, multiply by 0.125: 80 fl oz × 0.125 = 10 cup.
How to Use
- Enter the value you want to convert in the Cup field
- The result in Fluid Ounce 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 cups to fluid ounces?
Enter the value in Cup (cup) in the 'From' field. The equivalent in Fluid Ounce (fl oz) 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 cup to fl oz?
1 cup = 8 fl oz, so fluid ounces = cups × 8. To convert back, 1 fl oz = 0.125 cup. The full formula and a worked example are shown on this page.
How many fluid ounces are in one Cup?
1 cup = 8 fl oz.
Is this Cup to Fluid Ounce 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 fluid ounces back to cups?
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 cup to fl oz 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.