Volume conversion
US cup to US fluid ounce
One us cup is 8 fluid ounces. Enter any value below to convert it instantly, or use the reference table further down for the numbers you need most often.
Conversion rate
1 cup = 8 fl oz
fl oz = cup × 8
1 cup = 8 fl oz
Reference
US cup to US fluid ounce table
The values people look up most often, rounded for practical use.
| US cup (cup) | US fluid ounce (fl oz) | Written out |
|---|---|---|
| 1 cup | 8 fl oz | 1 cups = 8 fluid ounces |
| 2 cup | 16 fl oz | 2 cups = 16 fluid ounces |
| 3 cup | 24 fl oz | 3 cups = 24 fluid ounces |
| 5 cup | 40 fl oz | 5 cups = 40 fluid ounces |
| 10 cup | 80 fl oz | 10 cups = 80 fluid ounces |
| 15 cup | 120 fl oz | 15 cups = 120 fluid ounces |
| 20 cup | 160 fl oz | 20 cups = 160 fluid ounces |
| 25 cup | 200 fl oz | 25 cups = 200 fluid ounces |
| 50 cup | 400 fl oz | 50 cups = 400 fluid ounces |
| 100 cup | 800 fl oz | 100 cups = 800 fluid ounces |
| 250 cup | 2,000 fl oz | 250 cups = 2,000 fluid ounces |
| 500 cup | 4,000 fl oz | 500 cups = 4,000 fluid ounces |
| 1,000 cup | 8,000 fl oz | 1,000 cups = 8,000 fluid ounces |
How to convert cups to fluid ounces
Multiply the number of cups by 8. That is the whole calculation: fl oz = cup × 8. To go back the other way, divide instead, or multiply by 0.125.
Worked example: 12 cups × 8 = 96 fluid ounces.
Where this conversion comes up
Volume conversions are mostly a cooking problem, and there is a trap: US and imperial measures share names but differ in size. A US pint is 473 ml, an imperial pint is 568 ml. The units here are US measures unless labelled otherwise.
Quick answers
- 1 us cup = 8 fluid ounces
- 2 cups = 16 fluid ounces
- 5 cups = 40 fluid ounces
- 10 cups = 80 fluid ounces
- 100 cups = 800 fluid ounces
More conversions
Other volume conversions
Answers
Frequently asked questions
fl oz = cup × 8. The converter above applies it for you, but the formula is useful in a spreadsheet, put your value in column A and the formula in column B.Related tools
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