Actually, it isn’t that tough, so don’t worry about having to book any flights, unless of course you are ready for a vacation to Greece.

In fact, you can simply read on to understand how many ounces in a cup of water. Who knows? Maybe you will become the next Oracle… Or at least the wisest one in your kitchen, capable of seeing the future of the next recipe at the very least.

Table of contents

The easy answer is 1 cup equals 8 fluid ounces.

fluid ounces in a cup.

Fluid OuncesCups
1 ounce1/8 cup
2 ounces1/4 cup
~ 3 ounces1/3 cup
4 ounces1/2 cup
~5 ounces2/3 cup
6 ounces3/4 cup
8 ounces1 cup


The Difference Between Volume and Weight

A fluid ounce actually measures the volume of liquid. Conversely, a dry ounce measures weight.

Unfortunately, the two measures rarely equal each other. The good news is a cup measure still comes in handy for measuring dry and wet ingredients equally when it comes to using a cup for recipes.

Liquid and dry measurements are different. But how different? Well we can start with the lingo. Ounces and Fluid Ounces.

Measuring volume defines how much is needed to fill a specific measurement. Measuring weight tells you how much mass there is. An ounce of cotton candy looks huge compared to an ounce of Pop Rocks, but they both have the same dry weight, when measured as an ounce.

But, a fluid ounce of maple syrup and a fluid ounce of lemon juice both fill up a wet measurement cup to the same fluid ounce line – even though they weigh differently in terms of actual density.

Here is another way to picture it…

A cup of chocolate chips weighs a little more than that same cup measured to the line with melted chocolate chips. So, a fluid ounce of melted chocolate chips is actually about 1 and 1/4 cups of dry chocolate chips because a fluid oz of chocolate is about 1.25 ounces of chocolate chips.

In recipes, any wet ingredients measured in imperial cups assumes those standards. That is why cup measures have those nifty lines on the side that measure the increments in ounces, cups, pints, and quarts depending on the size of your cup measure.

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