How Many Ounces In A Cup – Dry-Wet-Imperial-Metric

A set of dry measuring cups and a liquid glass measuring cup.

How many ounces in a cup? The answer is 1 cup equals 8 ounces if you are measuring liquid ingredients in the United States. However, if you are measuring in the United Kingdom or other countries that use the metric system then 1 cup equals 10 ounces.

The difference comes from the country’s legal standards of measurement. The United States and the United Kingdom have different measurement standards.

How Many Ounces In A Cup Importance

You need to know the answer in case a recipe lists ingredients by ounces and you only have cups to measure with.

Alternatively the recipe may have ingredients of what you need measured in cups but you have a canned ingredient that is listed in ounces and want to know how many cups it contains. You can determine how many cans or partial cans equal the cups you need.

Perhaps you only have measuring scales to measure in ounces. The conversion between ounces and cups will give you flexibility with how you measure ingredients.

More importantly knowing how many ounces in a cup will help you plan the amount of ingredients you need to buy since you will know how many ounces equal a cup. This is useful for weighed produce, fresh herbs, or liquids that have ounces on the label.

Everything you measure can be weighed in ounces or measured with teaspoons, tablespoons and cups.

An Ounce Compared to A Cup

Usually an ounce refers to weight in measurement in the US and the UK as well as other countries that use the Metric system. An ounce weighs 28.573 grams in the United States and 28.413 milliliters in the UK so a scale is needed to accurately measure the weight amount.

A cup measures volume, which is the amount of space something occupies.

Liquid Ingredient Measurements

Liquids contain 8 fluid ounces in a cup. Do you need measurements for parts of cups or multiple cups?

The following chart shows the US conversion of liquid ounces you can find on cans or bottles and correctly convert to cup measures from 1/8 of a cup to four cups.

1 Cup = 8 oz.

1/2 Cup = 4 oz.

1/3 Cup = 2.5 oz.

2/3 Cup = 5 oz.

1/4 Cup = 2 oz.

1/8 Cup = 1 oz.

1 1/2 Cup = 12 oz.

2 Cups = 16 oz.

2 1/2 Cups = 20 oz.

3 Cups = 24 oz.

3 1/3 Cups – 28 oz.

4 Cups = 32 oz.

Dry Ingredient Measurements

Dry ingredient measurements refer to volume. The weight of dry ingredients varies according to the density of the product.

You may have seen the labels on packages, especially cereal, that say that some ingredients may have settled during shipping. In other words it may have had eight cups in the box when they shipped it but it crunched down to seven cups after shaking around on the trip from factory to your kitchen.

Items like potato chips are light in weight so a cup of potato chips will weigh much less than dense items like raw potatoes.

What is the difference between ounce “oz.” and fluid ounces “fl oz.”?

An ounce is used when measuring dry ingredients. It measures the weight of the dry product.

A fluid ounce is used when measuring liquid wet ingredients. It measures the volume of the liquid.

Remember those measuring tubes in chemistry class? You were probably measuring fluid ounces in them.

Different Countries Measure a Cup Differently

Sometimes we forget measurement systems can vary by the region we are located in. For example, the US uses the Imperial Measurement System. In that system a cup equals 8 ounces.

Additionally, it also uses measurements like feet, inches, and pounds.

The UK, Australia, Canada and many other countries use the Metric System. In the Metric System a cup equals 10 ounces.

Those are important differences to remember so you can identify the correct measurement system.

Since it is easy to find recipes from all over the world on the internet, this can be a common problem when cooking. If other ingredients in the recipe refer to grams or deciliters (dl) then it is a metric system recipe.

What Countries Use the Imperial Measurement System?

Only three countries in the world use the Imperial System in day-to-day measurement: the US, Myanmar and Liberia.

The metric system is the most used measurement system in the world and all other countries use metric except US, Myanmar and Liberia.

This is important information if you get a recipe from a country that uses a different measuring system than yours as you will need to convert measurements to get the correct result when baking.

Does Elevation or Altitude Affect Measurement?

Yes, weight varies by altitude and elevation. Elevation and altitude is how high the distance that the location is above sea level.

All scales are affected by altitude since weight is the effect of gravity pulling. The further from the core of the earth that you are the less gravity there is and things weigh less.

If you are in a very high or low altitude keep in mind you may need to adjust weight measurements for your recipes.

Need a Quick guide to adjusting cooking times for baking at high altitudes? See King Arthur’s page on High-Altitude Baking.

Measuring Ounces of Wet or Dry ingredients

Ounces are measured in dry oz. and fluid ounces. Dry ingredients are measured in ounces. Use a scale for dry ingredients measuring in oz. for ingredients such as salt, flour, baking soda, and powdered sugar.

How to Measure Using Dry Measuring Cups

Dry measuring cups are made to hold a specific amount of dry ingredients to measure properly fill the cup a little over the top and then level it with the flat side of a knife to scrape the excess off.

How many ounces in a cup - dry measuring cups
How Many Ounces in a Cup?

Steps To Measure Dry Ingredients Correctly

First, place your measuring cup in a bowl to catch the excess that you level off.

Next, gently spoon dry ingredients into the cup to slightly overflowing. Use the flat edge of a knife to scrape the excess across the top of the cup and into the bowl. Ingredients like flour need to be sifted before measuring.

Finally, to check for accuracy you can weigh the ingredients on a scale. Be sure to subtract the empty container weight from the total weight.

It helps if you weigh an empty cup first to see how much it weighs and subtract that from the total of the cup plus ingredients total weight.

How to Fill Wet Measuring Cups

You will use a liquid measuring cup to measure liquid ingredients. Liquid measuring cups are usually clear glass or plastic so that you can see the liquid as you pour it into the container.

How many ounces in a cup -Wet or Liquid Measuring Cup.
Wet or Liquid Measuring Cup

First, fill it with liquid to desired line marking the measurement of what you need on the cup. For example, there are lines that mark 1/4 cup, 1/2 cup, 1 cup and 2 cups. The liquid cups often have markings that have ounces so you can see how many ounces are in a cup.

Next, look at the top of the liquid line at eye level by bending down to see it while it is on a flat surface.

Finally, check for accuracy using a scale. Be sure to subtract the weight of the cup from the total to get the weight of only ingredients.

How Many Ounces In A Cup Related Other Cooking Guides

Check out some of our other guides to help you prepare delicious and healthy recipes.

52 Types of Pasta {Beyond Spaghetti}

Food Calories List

How Long Is Food Good For in the Fridge

How to Make an Omelette

How to Cook Using Your Instant Pot


How many ounces is 1 cup?

8 oz. = 1 cup of liquids. Dry ingredients have different weights according to their density.

Is 8 oz. of water 1 cup?

Yes, 8 oz. of water = 1 cup.

Does 16 fl oz equal 1 cup?

No, 16 fl oz. does not equal 1 cup. 16 fl oz. = 2 cups.

Is 1 cup 8 oz or 16 oz?

1 cup = 8 oz.

Is there a difference between wet and dry measuring cups?

Yes wet and dry measuring cups are different. Wet measuring cups are see through so you can visually see the fill line. They are made of glass or clear plastic. Dry measuring cups are solid are meant to be scraped across the top to level off ingredients for accurate measurement.

Can I use a dry measuring cup for liquid?

It is more accurate to use a liquid measuring cup for liquids and a dry measuring cup for dry ingredients. However, some recipes are more flexible than others so the difference may not be great enough to matter. If it is a volume sensitive ingredient, be sure to use the correct type of cup to measure the ingredients.

What is the most accurate way to measure dry ingredients?

Use a dry measuring cup and level the ingredients off across the top with a flat edge knife. Start with sifted ingredients like flour and spoon gently into cup to avoid air pockets.

Is Mayo a liquid or dry measure?

Mayo is a dry measure. Unless an ingredient is a true liquid, not a semi-solid, it is best to use dry ingredient cups to measure accurately.

How many ounces are in a cup of water?

There are 8 ounces in a cup of water. Water is 8 ounces in volume and fluid weight.

How Many Ounces in A Cup of Flour?

There are 4 and 1/2 oz. in a cup of flour.

How Many Ounces in A Cup of Maple Syrup?

There are 12 oz. in a cup of maple syrup.

How Many Oz. in a Cup of Chocolate Chips?

There are 6 oz. in a cup of chocolate chips.

How Many Ounces does Popcorn Weigh?

Air popped popcorn weighs 3 oz. per cup.

Does High Altitude Increase or Decrease Weight?

High altitude decreases weight due to the pull of gravity. There is less pull of gravity the higher the elevation is and away from the core of the earth or the earth’s surface.

How many Tablespoons in an ounce?

There are 2 Tbls. in 1 Oz.

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