US cup → fluid ounce | Converter
Convert US cup to fluid ounce with the formula below. 1 cup ≈ 8 fl oz
Quick Insight
1 US cup = 8 fluid ounce
0.5 cup ≈ 4 fl oz. Follow the definition stated by the recipe or label; do not silently replace it with another cup convention.
Rounded factors
Relative rounding difference; not measurement uncertainty.
Visual Comparisons
Mathematical Facts
Convert US cup to fluid ounce with the formula below. fl oz ≈ cup × 8. 1 cup ≈ 0.2365882365 L; 1 fl oz ≈ 0.0295735295625 L Cup means the US customary cup (236.5882365 mL), not a 250 mL metric cup, a 240 mL labeling cup or a household glass. US customary liquid measures are used. US customary cups let a recipe quantity be expressed as repeatable measuring-cup volumes. US fluid ounces describe volume on liquid-container labels and in recipe measurements.
Why This Conversion Matters
Translate a liquid ingredient quantity into the measuring units available for the recipe. The worked amounts show the same volume before and after conversion. The calculator uses the full stored factor and rounds displayed results to 12 significant digits. Display precision is not a guarantee of measurement accuracy.
Real-World Examples
Liquid recipe scaling
Compare a half-US-cup liquid quantity with a fourfold recipe amount of 2 US cups. Translate a liquid ingredient quantity into the measuring units available for the recipe. The worked amounts show the same volume before and after conversion.
Examples:
- 0.5 cup ≈ 4 fl oz
- 2 cup ≈ 16 fl oz
Pro Tips:
- ✓Scale the whole recipe quantity first, convert once, then choose a suitable marked measuring vessel.
Quick Reference Table
| US cups | fluid ounces |
|---|---|
| 1 cup | 8 fl oz |
| 10 cup | 80 fl oz |
| 25 cup | 200 fl oz |
| 50 cup | 400 fl oz |
| 100 cup | 800 fl oz |
Formula: fl oz = cup × conversion factor
Common Mistakes to Avoid
Treating 240 mL or 250 mL as this calculator’s US cup
The US customary cup here is 236.5882365 mL. A 240 mL labeling cup and a 250 mL metric cup represent different volumes.
✓ Follow the definition stated by the recipe or label; do not silently replace it with another cup convention. 1 cup ≈ 8 fl oz.
Pro Tips
- ✓Check the cup definition: 236.5882365 mL here, rather than a 250 mL metric cup or a household glass.
- ✓Keep fl oz with the value; oz alone can mean mass, which needs density to relate it to volume.
- ✓Scale the whole recipe quantity first, convert once, then choose a suitable marked measuring vessel.
Frequently Asked Questions
How do I calculate the conversion?
fl oz ≈ cup × 8. 1 cup ≈ 0.2365882365 L; 1 fl oz ≈ 0.0295735295625 L Cup means the US customary cup (236.5882365 mL), not a 250 mL metric cup, a 240 mL labeling cup or a household glass. US customary liquid measures are used.
What is an example?
1 cup ≈ 8 fl oz; 10 cup ≈ 80 fl oz; 100 cup ≈ 800 fl oz
US cup → fluid ounce: What do the worked quantities look like?
0.5 cup ≈ 4 fl oz; 2 cup ≈ 16 fl oz. Scale the whole recipe quantity first, convert once, then choose a suitable marked measuring vessel.
Which definition or measurement error should I check?
The US customary cup here is 236.5882365 mL. A 240 mL labeling cup and a 250 mL metric cup represent different volumes. Follow the definition stated by the recipe or label; do not silently replace it with another cup convention.
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