How many ounces in a cup?
8 fluid ounces
One US cup holds 8 US fluid ounces (236.6 ml). That’s volume. If your recipe means weight ounces, the answer depends on what’s in the cup: flour is about 4¼ oz, sugar 7 oz.
4.23 ounces (weight)
All-purpose flour: 1 US cup = 120 g (spooned and leveled)
- 120 g
- 16 tbsp
- 48 tsp
- 237 ml
Fluid ounces and weight ounces are different things
A fluid ounce is a slice of space; an ounce on a scale is an amount of stuff. Fill the same 8 fl oz cup with different liquids and watch the weight change.
Volume
8 fl oz
Weight
8.3 oz
Water is the reference: 1 g per ml, so fluid and weight ounces nearly agree. (Even water weighs 8.3 oz, not 8, because the fluid ounce and the weight ounce were defined separately.)
Cups to fluid ounces
| US cups | Fluid ounces | ml |
|---|---|---|
| 1 cup | 8 fl oz | 237 ml |
| ¾ cup | 6 fl oz | 177 ml |
| ⅔ cup | 5.33 fl oz | 158 ml |
| ½ cup | 4 fl oz | 118 ml |
| ⅓ cup | 2.67 fl oz | 79 ml |
| ¼ cup | 2 fl oz | 59.1 ml |
| 2 cups (1 pint) | 16 fl oz | 473 ml |
| 4 cups (1 quart) | 32 fl oz | 946 ml |
Weight ounces in 1 cup
| Ingredient | oz per cup |
|---|---|
| All-purpose flour | 4.23 oz |
| Granulated sugar | 7.05 oz |
| Brown sugar | 7.51 oz |
| Butter | 8.01 oz |
| Powdered sugar | 4.23 oz |
| Rolled oats | 3.17 oz |
| White rice, uncooked | 6.53 oz |
| Chocolate chips | 6 oz |
| Honey | 12 oz |
| Whole milk | 8.61 oz |
| Cheddar, grated | 3.99 oz |
| Walnuts, chopped | 4.13 oz |
Questions cooks ask
How many ounces are in a cup?
There are 8 US fluid ounces in 1 US cup. That is a volume measurement. How many weight ounces a cup holds depends on the ingredient: about 8.3 oz for water, 4.25 oz for flour and 7 oz for sugar.
How many ounces in half a cup?
4 fluid ounces. A quarter cup is 2 fl oz, three-quarters of a cup is 6 fl oz.
How many ounces in a cup of dry ingredients?
Measured by volume, still 8 fluid ounces. By weight it varies: all-purpose flour weighs about 4.25 oz per cup, granulated sugar 7 oz, rolled oats 3.2 oz.
Is a UK cup 10 ounces?
An old British imperial cup is 10 imperial fluid ounces (284 ml). Modern UK recipes mostly use grams and ml, and the metric cup is 250 ml, about 8.45 US fl oz.
How many ounces in 2 cups?
16 US fluid ounces, which is one US pint.