How Many Ounces in a Cup? Cups to Ounces Converter
There are 8 fluid ounces in 1 U.S. cup. Use this cups to ounces converter to quickly convert common values like 1/4 cup, 1/3 cup, 1/2 cup, 3/4 cup, 1 cup, 2 cups, and 4 cups.
Use this cups to ounces converter to get instant answers for common measurements like 1/4 cup to oz, 1/3 cup to oz, 1/2 cup to oz, 3/4 cup to oz, 1 cup to oz, 2 cups to oz, and 4 cups to oz.
This page is based on the U.S. liquid cup and U.S. fluid ounce, making it useful for recipes, baking, drink measurements, and kitchen conversions.
Quick Answer
There are 8 U.S. fluid ounces in 1 U.S. cup. That means 1/4 cup = 2 fl oz, 1/3 cup = 2.67 fl oz, 1/2 cup = 4 fl oz, 2/3 cup = 5.33 fl oz, 3/4 cup = 6 fl oz, 2 cups = 16 fl oz, and 4 cups = 32 fl oz.
Cups to ounces converter
Quick Reference
Cups to Ounces Conversion Table
Use this quick chart to see how many ounces are in a cup and other common cup to ounces conversions. This page uses the U.S. liquid cup, where 1 cup equals 8 fluid ounces.
| Cups | Calculation | Fluid Ounces (fl oz) |
|---|---|---|
| 1/8 cup | 0.125 × 8 | 1 fl oz |
| 1/4 cup | 0.25 × 8 | 2 fl oz |
| 1/3 cup | 0.333333 × 8 | 2.666667 fl oz |
| 1/2 cup | 0.5 × 8 | 4 fl oz |
| 2/3 cup | 0.666667 × 8 | 5.333333 fl oz |
| 3/4 cup | 0.75 × 8 | 6 fl oz |
| 1 cup | 1 × 8 | 8 fl oz |
| 1 1/4 cups | 1.25 × 8 | 10 fl oz |
| 1 1/3 cups | 1.333333 × 8 | 10.666667 fl oz |
| 1 1/2 cups | 1.5 × 8 | 12 fl oz |
| 2 cups | 2 × 8 | 16 fl oz |
| 2 1/2 cups | 2.5 × 8 | 20 fl oz |
| 3 cups | 3 × 8 | 24 fl oz |
| 4 cups | 4 × 8 | 32 fl oz |
| 5 cups | 5 × 8 | 40 fl oz |
| 8 cups | 8 × 8 | 64 fl oz |
How It Works
How to Convert Cups to Ounces
To convert cups to ounces, multiply the number of cups by 8. If you are asking how many ounces in one cup, how many oz is a cup, or how many fluid ounces in a cup, the answer is 8 fluid ounces.
The Exact Cups to Ounces Formula
The formula for cups to fl oz is:
For example, 1 cup to oz = 8 fl oz and 2 cups to oz = 16 fl oz. To convert ounces to cups, divide fluid ounces by 8.
Step-by-Step Example
Start with the cup value
Example: you want to know how many ounces in 3/4 cup.
Multiply by 8
0.75 × 8 = 6 fl oz.
Write the answer with the unit
Final answer: 3/4 cup = 6 U.S. fluid ounces.
Measurement Guide
Ounces in a Cup: Liquid vs Dry Measurements
When most people search how many ounces in a cup, they mean fluid ounces, which measure volume. In standard U.S. measurement, 1 cup = 8 fluid ounces.
That is why 1/2 cup = 4 fl oz, 1/4 cup = 2 fl oz, 3/4 cup = 6 fl oz, and 2 cups = 16 fl oz. This is also true for liquids like water, milk, and juice.
Dry ounces are different because they measure weight, not volume. So searches like how many dry ounces in a cup or how many ounces is in a dry cup do not have one universal answer. The weight depends on the ingredient.
Worked Examples
Common Cups to Ounces Conversions
These are some of the most common cups to ounces searches and exact answers.
1/4 Cup to Oz
1/4 cup = 2 fl oz. This answers searches like how many ounces in 1/4 cup, 1/4 cup to oz, and how many oz is 1/4 cup.
1/3 Cup to Oz
1/3 cup = 2.67 fl oz. This is a common answer for 1/3 cup to oz and how many ounces in 1/3 cup.
1/2 Cup to Oz
1/2 cup = 4 fl oz. If you searched 1/2 cup to oz, how many ounces in 1/2 cup, or half cup in oz, the answer is 4 fluid ounces.
2/3 Cup to Oz
2/3 cup = 5.33 fl oz. This helps with 2/3 cup to oz, how many ounces in 2/3 of a cup, and how many oz is 2/3 cup.
3/4 Cup to Oz
3/4 cup = 6 fl oz. This is the exact answer for 3/4 cup to oz, ounces in a 3/4 cup, and how many ounces in 3/4 cup.
1 Cup to Oz
1 cup = 8 fl oz. This is the standard answer to 1 cup to oz, 1 cup in oz, how many oz in 1 cup, and how many ounces is 1 cup.
1 1/4 Cups to Oz
1 1/4 cups = 10 fl oz. This is useful for 1 1/4 cup to oz and how many ounces in a cup and a quarter.
1 1/2 Cups to Oz
1 1/2 cups = 12 fl oz. This answers 1 1/2 cups to oz, 1 1 2 cup is how many oz, and how many oz are in 1 1/2 cups.
2 Cups to Oz
2 cups = 16 fl oz. This matches searches like 2 cups to oz, how many ounces in 2 cups, and how many oz is 2 cups.
4 Cups to Oz
4 cups = 32 fl oz. This is the exact result for 4 cups to oz and how many ounces is 4 cups.
5 Cups to Oz
5 cups = 40 fl oz. This is a helpful answer for 5 cups to oz.
8 Cups to Oz
8 cups = 64 fl oz. This is useful for larger kitchen and recipe conversions.
FAQ
Frequently Asked Questions About Cups to Ounces
Quick answers to the most common how many ounces in a cup, cups to ounces, and ounces in a cup searches.