Ounces → Cups
4 oz to cups
If you mean fluid ounces (liquid volume), 4 fl oz = 1/2 cups. If you mean weight ounces of a dry ingredient, the answer depends on density — 4 oz of flour is about 15/16 cups. Both are below.
1/2 cups (fluid)
4 fluid ounces ÷ 8 fl oz per cup = 0.5 cups
Fluid ounces vs weight ounces
This is the trap with “oz to cups.” A fluid ounce is a unit of volume; a regular ounce is a unit of weight. They only line up for water. For dry goods you must use the ingredient's density, which is why the weight table below differs for each one.
15/16 cups
4 ounces of all-purpose flour = 0.945 cups
4 oz by weight, per ingredient
| Ingredient | 4 oz in cups | Per-cup weight |
|---|---|---|
| 🌾 All-Purpose Flour | 15/16 cups | 120 g/cup |
| 🍞 Bread Flour | 7/8 cups | 127 g/cup |
| 🎂 Cake Flour | 0.995 cups | 114 g/cup |
| 🌿 Whole Wheat Flour | 1 cups | 113 g/cup |
| 🍚 Granulated Sugar | 9/16 cups | 200 g/cup |
| 🟤 Brown Sugar (packed) | 1/2 cups | 220 g/cup |
| ❄️ Powdered Sugar | 15/16 cups | 120 g/cup |
| 🧈 Butter | 1/2 cups | 227 g/cup |
| 🫒 Vegetable Oil | 1/2 cups | 218 g/cup |
| 🥛 Milk | 1/2 cups | 240 g/cup |
| 💧 Water | 1/2 cups | 237 g/cup |
| 🍯 Honey | 1/3 cups | 340 g/cup |
| 🍙 White Rice (uncooked) | 5/8 cups | 185 g/cup |
| 🥣 Rolled Oats | 1 1/4 cups | 90 g/cup |
| 🍫 Cocoa Powder | 1 1/3 cups | 85 g/cup |
Frequently asked questions
How many cups is 4 oz?
For liquids measured in fluid ounces, 4 fl oz equals 1/2 cups, since there are 8 fluid ounces in a US cup. For dry ingredients measured by weight, it depends on density — 4 oz of flour is about 15/16 cups.
Is 4 oz fluid ounces or weight ounces?
Recipes can mean either. Fluid ounces measure volume (8 fl oz = 1 cup). Weight ounces measure mass and must be converted using the ingredient's density. Check whether your recipe lists "fl oz" (volume) or "oz" by weight.
How many cups is 4 fluid ounces of water?
Water is the reference liquid, so 4 fluid ounces of water is 1/2 cups exactly.