How to convert US cups to US fluid ounces
One US cup equals 8 US fluid ounces. To convert, multiply the number of US cups by 8:
Mental-math shortcut: One US cup is exactly 8 fluid ounces, so multiply cups by 8.
Example
Convert 2 US cups to US fluid ounces: 2 cup × 8 = 16 fl oz.
Cups to Fluid Ounces conversion chart
| Cups (cup) | Fluid Ounces (fl oz) |
|---|---|
| 1/8 | 1 |
| 1/4 | 2 |
| 1/3 | 2.6667 |
| 1/2 | 4 |
| 2/3 | 5.3333 |
| 3/4 | 6 |
| 1 | 8 |
| 1.5 | 12 |
| 2 | 16 |
| 3 | 24 |
| 4 | 32 |
| 8 | 64 |
| 16 | 128 |
What is a US cup?
The US customary cup is 8 US fluid ounces, about 236.6 milliliters. US nutrition labels use a "legal cup" of exactly 240 mL, and Australia, Canada and many other countries use a metric cup of 250 mL. This converter uses the US customary cup.
What is a US fluid ounce?
The US fluid ounce (fl oz) is 1/128 of a US gallon, about 29.57 milliliters. It is used for drinks, liquid ingredients and bottle sizes in the United States. The UK imperial fluid ounce is slightly smaller, about 28.41 mL.
Frequently asked questions
How many US fluid ounces is one US cup?
One US cup is 8 US fluid ounces.
How do I convert US cups to US fluid ounces?
Multiply the value in US cups by 8. For example, 2 cup × 8 = 16 fl oz.
What is 0.75 cup in US fluid ounces?
0.75 cup is 6 US fluid ounces.
How do I convert US fluid ounces to US cups?
Multiply US fluid ounces by 0.125 (or divide by 8).
How many ounces is a cup of flour?
This converter measures volume (fluid ounces). By weight, a cup of all-purpose flour is roughly 4.25 oz (120 g) — the weight depends on the ingredient, so use a kitchen scale or a weight chart for dry ingredients.
Conversions use the internationally agreed definitions of each unit (for example, 1 inch = 2.54 cm exactly) and are rounded for display. Volume converters use US customary units unless stated otherwise.
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