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How Many Ounces Are In A Cup

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Measuring ingredients accurately is a crucial aspect of cooking and baking. Knowing how many ounces are in a cup can help you follow recipes more precisely and achieve consistent results.

In this article, we’ll explore the topic of how many ounces are in a cup for both fluid and dry ingredients, provide conversion tables for different ingredients, and offer some helpful tips for measuring ingredients accurately.

How Many Ounces Are In A Cup

How Many Fluid Ounces Are in a Cup?

A cup is a unit of volume measurement commonly used in cooking and baking. It’s equivalent to 8 fluid ounces (fl oz) or 236.59 milliliters (ml) in the US customary system.

However, the metric system defines a cup as 250 ml or 8.45 fl oz.

Fluid Ounces US CupGallon
128 Fl Oz16 C1 Gallon
64 Fl Oz8 C1/2 Gallon
32 Fl Oz4 C1/4 Gallon
16 Fl Oz2 C1/8 Gallon
8 Fl Oz1 C1/16 Gallon
4 Fl Oz1/2 C1/32 Gallon
2 Fl Oz1/4 C1/64 Gallon
1 Fl Oz1/8 C1/128 Gallon

There are also some lesser-known cups such as:

  • US Legal Cup (for nutrition labels) – 240 ml or 8.11537 ounces
  • Canadian Cup – 250 ml or 8.45351
  • Conventional Canadian Cup – 227.3045 ml or 7.6860795232 ounces
  • UK Imperial Cup – 284.131 ml or 9.607612084 ounces
  • Japanese Cup – 200 ml or 6.7628 ounces
  • Russian Cup – 123 ml or 4.159125 ounces

Therefore, the answer to the question of how many ounces are in a cup depends on the system of measurement you’re using.

In the US, a cup contains 8 fl oz, while in the metric system, it contains 8.45 fl oz.

Cup TypeOuncesMilliliters
US Customary Cup8 fl oz236.59 ml
Metric Cup8.45 fl oz250 ml
US Legal Cup8.11 fl oz240 ml
Canadian Cup8.45 fl oz250 ml
Conventional Canadian Cup7.69 fl oz227.3 ml
UK Imperial Cup9.61 fl oz284.13 ml
Japanese Cup6.76 fl oz200 ml
Russian Cup4.16 fl oz123 ml
How Many Ounces Are In A Cup - US Cup to Ounce, gallon, and quart conversion table.

Conversion Tables for Different Ingredients

When it comes to measuring ingredients, different ingredients have different densities, and therefore, their weight per volume may vary.

Intuitively, you can feel that a cup full of lead will weigh more than a cup of puffed rice.

This means that the number of ounces in a cup of one ingredient may not be the same as the number of ounces in a cup of another ingredient. Here are some conversion tables for common ingredients:

  • Flour: 1 cup of all-purpose flour weighs 4.4 oz (125 grams).
  • Sugar: 1 cup of granulated sugar weighs 7 oz (200 grams).
  • Brown sugar: 1 cup of packed brown sugar weighs 7.8 oz (220 grams).
  • Butter: 1 cup of butter weighs 8 oz (227 grams).
  • Milk: 1 cup of milk weighs 8.6 oz (244 grams).
  • Water: 1 cup of water weighs 8.4 oz (237 grams).
  • Olive Oil: 1 cup of oil weighs 7.6 oz (216 grams).
  • Oats: 1 cup of oats weighs 2.9 oz (81 grams).
  • Maple Syrup: 1 cup of maple syrup weighs 11.4 oz (322 grams).

It’s important to note that these conversion tables are approximate, and the weight of the ingredients may vary depending on factors such as humidity, temperature, and the method of measuring.

1 Cup ofMeasures in OuncesMeasures in Grams
Flour4.4 ounces125 grams
Almond Flour3.9 ounces112 grams
Coconut Flour4.2 ounces120 grams
Sugar7 ounces200 grams
Brown Sugar7.8 ounces220 grams
Butter8 ounces227 grams
Milk8.6 ounces244 grams
Water8.4 ounces237 grams
Olive Oil7.6 ounces216 grams
Oats2.9 ounces81 grams
Maple Syrup11.4 ounces322 grams
Cup to Ounce conversion table.

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Tips for Measuring Ingredients Accurately

Measuring ingredients accurately is essential for getting the desired texture and taste in your recipes. Here are some tips for measuring ingredients accurately:

  • Use Measuring Cups and Spoons: Measuring cups and spoons are essential tools for measuring ingredients accurately. Invest in a set of good-quality measuring cups and spoons, and use them consistently for all your recipes. Make sure you pick the right ones! If you use recipes with US Customary measurements like the ones found on Sweet As Honey, pick US cups!
  • Level Off Dry Ingredients: When measuring dry ingredients such as flour or sugar, it’s important to level off the top of the measuring cup with a straight edge, such as a knife or spatula. This helps to ensure that you’re using the correct amount of ingredients.
  • Use a Kitchen Scale: A kitchen scale can be a useful tool for measuring ingredients by weight. It’s especially helpful when measuring ingredients such as flour, which can be compressed and may vary in weight depending on how it’s packed.
  • Measure Liquids at Eye Level: When measuring liquids, such as milk or water, it’s important to measure them at eye level. This helps to ensure that you’re using the correct amount of liquid and can prevent over-measuring or under-measuring.

Converting Recipes to Metric or US Customary Units

If you’re following a recipe that uses a different system of measurement than what you’re used to, you may need to convert the recipe to the system you’re familiar with.

Here are some conversion factors you can use:

  • To convert from US customary units to metric units:

1 cup = 236.59 ml

1 oz = 28.35 grams

  • To convert from metric units to US customary units:

1 ml = 0.00423 cups

1 gram = 0.03527 oz

It’s important to note that when converting recipes, it’s best to use precise measurements and avoid rounding up or down, as this can affect the outcome of your recipe.


Knowing how many ounces are in a cup is a fundamental aspect of cooking and baking. It’s essential for following recipes accurately and achieving consistent results.

In this article, we’ve explored the topic of how many ounces are in a cup, provided conversion tables for different ingredients, and offered some helpful tips for measuring ingredients accurately.

By following these guidelines, you can ensure that your recipes turn out perfectly every time.

Carine Claudepierre

About The Author

Carine Claudepierre

Hi, I'm Carine, the food blogger, author, recipe developer, published author of a cookbook and many ebooks, and founder of Sweet As Honey.

I have an Accredited Certificate in Nutrition and Wellness obtained in 2014 from Well College Global (formerly Cadence Health). I'm passionate about sharing all my easy and tasty recipes that are both delicious and healthy. My expertise in the field comes from my background in chemistry and years of following a keto low-carb diet. But I'm also well versed in vegetarian and vegan cooking since my husband is vegan.

I now eat a more balanced diet where I alternate between keto and a Mediterranean Diet

Cooking and Baking is my true passion. In fact, I only share a small portion of my recipes on Sweet As Honey. Most of them are eaten by my husband and my two kids before I have time to take any pictures!

All my recipes are at least triple tested to make sure they work and I take pride in keeping them as accurate as possible.

Browse all my recipes with my Recipe Index.

I hope that you too find the recipes you love on Sweet As Honey!

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