Cup (US) to Fluid Ounce (US)
1 cup = 8 fl oz
Convert Cup (US) (cup) to Fluid Ounce (US) (fl oz) with engineering-grade precision. Instant results, formula, and reference table below.
1 Cup (US) ≈8 Fluid Ounce (US)
How to convert Cup (US) to Fluid Ounce (US) (cup to fl oz)
Converting Cup (US)s to Fluid Ounce (US)s is critical for developers working with international data standards or scientific applications. This tool performs the calculation entirely on your client (browser) using JavaScript/WASM, ensuring zero latency and maximum privacy.
The Formula
1 cup = 8.00000 fl oz
Calculation Example
Let's say you want to convert 5 cup to fl oz:
- Input: 5 cup
- Calculation: 5 × 8.00000
- Result: 40.0000 fl oz
About the Cup (US) to Fluid Ounce (US) conversion
The conversion factor from Cup (US) (cup) to Fluid Ounce (US) (fl oz) is 8, meaning 1 cup = 8 fl oz and inversely 1 fl oz = 0.125 cup. That makes the Cup (US) the larger of the two units in the volume category, where the SI base unit is the liter. Every ratio here is derived from the SI/international definition rather than a rounded approximation, so results are stable across repeated conversions.
Need the reverse? Use the Fluid Ounce (US) to Cup (US) converter.
Frequently Asked Questions
How do I convert Cup (US) to Fluid Ounce (US)?
To convert Cup (US) to Fluid Ounce (US), you need to multiply the cup value by 8.00000.
What is the formula for cup to fl oz?
The simple formula is: fl oz = cup × 8.00000.
Which is bigger: Cup (US) or Fluid Ounce (US)?
A Cup (US) is bigger. One Cup (US) is equal to approx 8.0000 Fluid Ounce (US)s.
How many Cup (US)s are in one Fluid Ounce (US)?
There are approximately 0.125000 Cup (US)s in one Fluid Ounce (US).
Quick Conversion Table
| cup | fl oz |
|---|---|
| 1 | 8.0000 |
| 5 | 40.0000 |
| 10 | 80.0000 |
| 20 | 160.0000 |
| 50 | 400.0000 |
| 100 | 800.0000 |