How to use Cups to Oz
- Type a value in US cups.
- The result in US fluid ounces appears instantly.
- Type in the second box to convert the other way.
How to convert US cups to US fluid ounces
Multiply the value in US cups by 8. Formula: fl oz = cup × 8. Example: 10 cup × 8 = 80 fl oz.
Common US cups to US fluid ounces conversions
5 cup = 40 fl oz. 25 cup = 200 fl oz. 50 cup = 400 fl oz. 100 cup = 800 fl oz.
Quick mental math
Quick rule: 1 US cup is exactly 8 US fluid ounces.
Where is cup to fl oz conversion used?
Volume conversions are needed for cooking and baking with American recipes, measuring medicine doses, comparing drink and bottle sizes, and calculating fuel in liters or gallons.
What are US cups?
A US cup is 8 US fluid ounces, about 236.6 milliliters. It is the standard measure in American recipes.
What are US fluid ounces?
A US fluid ounce is about 29.57 milliliters. It is used for drinks and cosmetics in the US. (A UK fluid ounce is 28.41 mL.)
US cups to US fluid ounces conversion table
| US cups (cup) | US fluid ounces (fl oz) |
|---|---|
| 1 | 8 |
| 2 | 16 |
| 3 | 24 |
| 4 | 32 |
| 5 | 40 |
| 6 | 48 |
| 8 | 64 |
| 10 | 80 |
| 12 | 96 |
| 16 | 128 |
| 20 | 160 |
| 25 | 200 |
| 32 | 256 |
| 50 | 400 |
| 100 | 800 |
| 250 | 2,000 |
| 500 | 4,000 |
| 1,000 | 8,000 |
Frequently asked questions
How many US fluid ounces are in 1 US cup?
1 US cup = 8 US fluid ounces (1 cup = 8 fl oz).
How many US cups are in 1 US fluid ounce?
1 US fluid ounce = 0.125 US cups (1 fl oz = 0.125 cup).
What is 10 cup in US fluid ounces?
10 cup = 80 fl oz.
What is 100 cup in US fluid ounces?
100 cup = 800 fl oz.
Is the cup to fl oz conversion exact?
Yes for US units: the US gallon is defined as exactly 3.785411784 liters, and cups, fluid ounces and spoons are exact fractions of it. UK (imperial) gallons and fluid ounces are different sizes.
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