How Many Ounces in a Cup


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Need an instant calculation for how many ounces are in a cup? Here is the ultimate quick guide and measurement chart for working with recipes using both the metric and imperial system.

Want more cooking resources? Check out how to convert grams in an ounce, tablespoons in a cup, and grams in a cup.

how many ounces in a cup printable

With so many recipes out there, it can be confusing to work with different measurements. Unfortunately, not all measurements are created equal.

Sure, plenty of online calculators can provide you with one or two answers; however, they aren’t comprehensive or easy to read. Here, you can quickly convert ounces to cups for all your favorite recipes using both the metric and imperial systems.

Table of Contents
  1. What is an ounce?
  2. What is a cup?
  3. Converting ounces to cups
  4. Equipment for measuring cups
  5. Fluid ounces to cups
  6. Dry ounces to cups
  7. British vs. American measuring cups
  8. More useful conversions
  9. Frequently Asked Questions

What is an ounce?

An ounce is a smaller unit of measure used to weigh out volume, weight, and mass. It measures small quantities of ingredients in recipes or the specific weight of a certain item.

What is a cup?

Cups are kitchen tools used to accurately measure and portion out dry or liquid ingredients for cooking and baking. They typically come in sets with various cup and spoon sizes, ensuring precise measurements.

In the US, one cup equals 1/2 of a US pint.

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

Converting ounces to cups

Here is what you need to know to understand how many ounces are in one 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.

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 grams0.9375 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

Three key sets of equipment are needed to measure the liquid and dry ingredients. These include dry cups, liquid cups, and measuring spoons.

Dry measuring cups

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

How to fill dry measuring cups

  1. Make sure the dry ingredients are loose and without lumps (you can sieve or lightly whisk the ingredients to remove them). 
  2. Spoon the dry ingredients into the measuring cup and fill until it overflows. 
  3. Level the dry ingredient off with the back of a knife or fork or shake off excess.

NOTE: Do not pack the dry ingredients into the cup (unless the recipe states to do so), as this can affect the accuracy of it.

Liquid Measurement Cups

Liquid measuring cups are used for measuring out fluid ounces and are perfect for measuring liquid ingredients.

How to Fill Liquid Measuring Cups

  1. Place the measuring cup on a flat surface. 
  2. Pour the liquid in until it reaches the surface line. If it overflows, it is too much. 

NOTE: Butter and cream cheese are two examples of wet ingredients which are sold in a solid state. To measure them correctly in a cup, they must be soft/softened. 

Measuring Spoons

Tablespoons and measuring spoons are great for measuring small ingredients instantly and can be use for both wet and dry ingredients.

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 1/2 dry-weight ounces in one cup. This, too, is according to the US system. With dry ingredients, it’s important to remember that they need to be measured by weight.

British vs. American measuring cups

There is very little difference between United Kingdom and United States measuring cups. Unless you have a very precise recipe needing accurate measurements, you don’t need to worry about converting between cups.

1 UK cup (metric system) = 250 ml 

1 US cup (imperial system) = 240 ml 

how many ounces in a cup chart

More useful conversions

Frequently Asked Questions

How many ounces are in a dry cup?

There are 4.5 ounces of dry ingredients in a cup.

How many ounces in a cup of water?

A cup of water contains eight liquid ounces.

How many ounces in a cup of flour?

A cup of flour has 4 1/2 ounces.

How many ounces in a cup of butter?

A cup of butter, measured in its solid state, has eight ounces of butter.

Originally published March 2022, updated and republished May 2024

Arman Liew

I’m a two time cookbook author, photographer, and writer, and passionate about creating easy and healthier recipes. I believe you don’t need to be experienced in the kitchen to make good food using simple ingredients that most importantly, taste delicious.

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  1. Oh dear! I got really excited when I saw this post, Arman.
    I try and convert and measure everything on my scales into grams, rather than ounces; as it works so well for me, (as long as I google for wet AND dry:).
    However it is always a trial, as I never remember the CUP equivalents for the next time I do a new recipe.
    If you had a conversion table for wet and dry cups into GRAMS I would never leave you!! Or if you or anyone can direct me to a web page that does, I would really appreciate it.
    By the way, thank you for the brilliant recipes and ideas that you have given us. I love them!

    1. Good stuff!! I was told by my daughter that you could use liquid measuring cup for oatmeal ,I have my doubts. We use two to one ratio. Is she wrong? Thank you sir!