How Many Ounces in a Cup (Dry and Liquid Measurements)

What if you get a recipe that needs you to figure out how many ounces are in a cup? No problem, here is what you need to know.

This helpful post will show you how to calculate how many ounces in a cup easily. Whether you are operating in the metric or imperial system, this post has got you covered. Unsure of which method you are working in? Not to worry, that is all outlined here.

There are plenty of quick calculators online, but this informative and helpful guide is here to teach you the theory. This way will help you retain the information in the long run.

How many ounces in a cup.

What is an Ounce?

An ounce is a unit of measure used to weigh out volume, weight, and mass. This accurate unit of measure is used in the United States of America, Myanmar, and Liberia to weigh out ingredients.

The rest of the world uses grams as opposed to ounces. If you need to know how many ounces in 1 cup, you first need to understand ounces.

What is a Cup?

Perhaps your favorite coffee cup pops into your mind when you think of a cup. However, when it comes to cooking and baking, proper measuring cups are available.

Measuring with cups is an easy and practical way of measuring ingredients. Most recipes online get measured in cups.

In the US, 1 cup equals ½ of a US pint.

In the metric system, 1 metric cup is 250 ml.

Tablespoons and teaspoons are the baby cousins of cups. When you purchase a set of measuring cups, you will likely buy a set of spoons too!

When calculating how many ounces in 1 cup, you first need to have a clear idea of cup measurements.

Convert Ounces to Cups

Here is what you need to know to understand how many ounces are in 1 cup and more:

  • 1 cup = 8 fluid ounces
  • ¾ cup = 6 fluid ounces
  • ½ cup = 4 fluid ounces
  • ¼ cup = 2 fluid ounces
  • 1 cup = 4.5 dry-weight ounces

Here is a helpful conversion chart for converting between ounces and cups for dry ingredients. These are rounded to the nearest whole number. Check out this Grams to Ounces Conversion too!

Ounces (oz)Grams (g)Pounds (lb)
1/2 ounce15 grams0.03125 pounds
1 ounce28 grams0.0625 pounds
2 ounces56 grams0.125 pounds
3 ounces85 grams0.1875 pounds
4 ounces113 grams0.25 pounds
5 ounces142 grams0.3125 pounds
8 ounces226 grams0.5 pounds
10 ounces283 grams0.625 pounds
12 ounces340 grams0.75 pounds
15 ounces425 grams 0.9375 pounds

Below is a conversion chart for converting between ounces and cups for liquid ingredients. These are rounded to the nearest whole number.

Ounces (fl oz)CupsMilliliters (mL)Tablespoons (Tbsp)
2 fl oz1/4 cup59 mL4 Tbsp
2 2/3 fl oz1/3 cup79 mL5 Tbsp
4 fl oz1/2 cup118 mL8 Tbsp
5 1/3 fl oz2/3 cup158 mL10 Tbsp
6 fl oz3/4 cup177 mL12 Tbsp
8 fl oz1 cup237 mL16 Tbsp
12 fl oz1 1/2 cups355 mL24 Tbsp
16 fl oz2 cups474 mL32 Tbsp
32 fl oz4 cups948 mL64 Tbsp
64 fl oz8 cups1896 mL128 Tbsp

Equipment for Measuring Cups

With regards to measuring dry ingredients and liquids, here are three critical sets of equipment. There are glass, plastic, and metal versions available in the different cups and spoons.

Liquid Measurement Cups

Liquid measurement cups are designed to measure fluid ounces. These are brilliant for measuring out liquid ingredients. They are also used for portioning soups, sauces, etc. Read on for tips on how to measure wet ingredients accurately.

Dry Measuring Cups

These cups are perfect to measure dry ingredients like sugar, flour, corn flour, etc. See below for tips on how to measure dry ingredients accurately.

Measuring Spoons

Tablespoons and measuring spoons are great for measuring small ingredients in an instant. Use for both wet and dry ingredients.

How to Fill Dry Measuring Cups

Here is how to measure dry ingredients accurately in a cup:

  1. Ensure the dry ingredient is loose and lump-free. Sieving or lightly whisking the ingredient is an easy way to get rid of lumps. This is perfect for flour or sugar (powdered sugar). Humid environments can cause lumps and clumps to form.
  2. Next, spoon the dry ingredient into the measuring cup. Fill it until it overflows.
  3. Place the cup onto a stable and level surface.
  4. Level the flour or dry ingredient off with the back of a knife or a straight utensil.

Do not pack the dry ingredient firmly into the cup. This can result in an inaccurate result.

How to Fill Liquid Measuring Cups

Here is another crucial element when learning about how many ounces are in a cup. To correctly measure liquids, follow these directions:

  1. Place the measuring cup on a flat surface. This will stabilize the receptacle.
  2. Bend down to see the top level of the measuring cup.
  3. Pour the liquid in until it reaches the surface (or just below the surface) line.

Note: Butter is considered a wet ingredient. To measure butter correctly in a cup, it must be soft.

Fluid Ounces to Cups

There are 8 fluid ounces in 1 cup. This is according to the US system.

If using liquid ingredients, we measure them in fluid ounces. 

Dry Ounces to Cups

There are 4.5 dry-weight ounces in 1 cup. This is according to the US system.

With dry ingredients, you need to measure it by weight. There is a big difference between fluid and dry ounces. It is essential to keep this in mind.

British Versus American Measuring Cups

The difference between US and UK measuring cups is tiny. There is absolutely no need to worry about converting between cups unless you have a very precise recipe.

A UK cup (in cooking) is 250 ml. The US measuring cup is 240 ml.

Other measurements to note:

  • ½ UK cup is 125 ml
  • ½ US cup is 120 ml

Before you can work out how many ounces are in 1 cup, it is important to what type of cup you are working with.

Cups with ounces and measurements.

Frequently Asked Questions (FAQs)

How many ounces are in a dry cup?

There are 4.5 ounces of dry ingredients in a cup.

How many cups are in a gallon?

There are 18.62 cups in a gallon when it comes to dry ingredients. There are 16 cups of liquid in a gallon.

How many pints are in a quart?

1 US liquid quart is equal to 2 US liquid pints. Check out this How Many Pints in a Quart post for more information.

How many ounces are in a cup of butter?

In 1 US cup, there are 8 fluid ounces of butter.

How many ounces in a cup of water?

There are eight fluid ounces in a cup of water.

How many ounces in a cup of flour?

There are 4.5 ounces in one cup of flour.

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  1. Janneta Bohlander

    I found this article about “How Many Ounces in a Cup” incredibly helpful! As someone who enjoys cooking and baking, accurate measurements are essential for getting the perfect results every time. The clear and concise explanation provided here has taken away any confusion I had regarding this common kitchen conversion. It’s amazing how a simple piece of information can make a significant difference in the outcome of a recipe. Kudos to the writer for breaking down this concept in such an understandable manner. I’ll definitely be bookmarking this page for future reference in my culinary endeavors.