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How many ounces in a cup?
A US cup holds 8 fluid ounces. That is a measure of volume. A cup of an ingredient weighs a different number of ounces depending on what it is: about 8.3 oz for water, 4.4 oz for flour and 7 oz for sugar.
1 cup = 8 fluid ounces
Measure it: 1 cup
Cups to fluid ounces chart
| Cups | Fluid ounces | How to measure |
|---|---|---|
| ¼ cups of all-purpose flour | 2 | ¼ cup |
| ⅓ cups of all-purpose flour | 2.67 | ⅓ cup |
| ½ cups of all-purpose flour | 4 | ½ cup |
| ⅔ cups of all-purpose flour | 5.33 | ⅔ cup |
| ¾ cups of all-purpose flour | 6 | ¾ cup |
| 1 cup of all-purpose flour | 8 | 1 cup |
| 1½ cups of all-purpose flour | 12 | 1 ½ cups |
| 2 cups of all-purpose flour | 16 | 2 cups |
| 3 cups of all-purpose flour | 24 | 3 cups |
| 4 cups of all-purpose flour | 32 | 4 cups |
Weight of 1 cup by ingredient
| Ingredient | 1 cup | Ounces |
|---|---|---|
| All-purpose flour | 125 g | 4.41 oz |
| Granulated sugar | 200 g | 7.05 oz |
| Butter | 227 g | 8.01 oz |
| Brown sugar | 220 g | 7.76 oz |
| Powdered sugar | 120 g | 4.23 oz |
| Milk | 244 g | 8.61 oz |
| Water | 237 g | 8.36 oz |
| White rice (uncooked) | 185 g | 6.53 oz |
| Rolled oats | 81 g | 2.86 oz |
| Cocoa powder | 86 g | 3.03 oz |
| Chocolate chips | 168 g | 5.93 oz |
| Almond flour | 96 g | 3.39 oz |
| Bread flour | 137 g | 4.83 oz |
| Honey | 339 g | 12 oz |
| Peanut butter | 258 g | 9.1 oz |
| Yogurt | 245 g | 8.64 oz |
| Vegetable oil | 218 g | 7.69 oz |
Weights per US cup (236.6 ml), spooned and levelled, from USDA FoodData Central. All ingredients.
Ounces get confused because the word means two things. Fluid ounces (fl oz) measure volume, like cups. Ounces (oz) measure weight, like grams. Liquid measuring cups are marked in fluid ounces, so 1 cup = 8 fl oz is always true there.
For dry ingredients, recipes that say "8 oz" usually mean weight. 8 oz of flour is not 1 cup: it is about 1¾ cups, because flour is light. Use a scale when a recipe gives ounces for something dry, or check the weight table below.
UK and Australian recipes use a 250 ml metric cup, which is 8.45 US fluid ounces. Old British recipes may use an imperial cup of 10 imperial fluid ounces (284 ml).
Questions
Is a cup 8 oz or 16 oz?
A cup is 8 fluid ounces. 16 fluid ounces is a pint (2 cups).
How many ounces in half a cup?
4 fluid ounces.
How many dry ounces in a cup?
It depends on the ingredient: a cup of all-purpose flour weighs about 4.4 oz, granulated sugar about 7 oz and butter 8 oz.