1 fluid ounce = 0.125 cups (1/8 cup). 8 fluid ounces = 1 cup. For dry ounces the weight varies by ingredient — use the full chart below for accurate oz to cups conversions.
Converting ounces to cups is one of the most common kitchen calculations. Whether you are measuring liquids or weighing dry ingredients, this complete guide covers fluid ounces, dry ounces, and every fraction so you never get stuck mid-recipe.
Fluid Ounces to Cups Conversion Table
| Fluid Ounces (fl oz) | Cups | Millilitres (ml) |
|---|---|---|
| 1 fl oz | 1/8 cup | 29.6 ml |
| 2 fl oz | 1/4 cup | 59.1 ml |
| 3 fl oz | 3/8 cup | 88.7 ml |
| 4 fl oz | 1/2 cup | 118.3 ml |
| 5 fl oz | 5/8 cup | 147.9 ml |
| 6 fl oz | 3/4 cup | 177.4 ml |
| 7 fl oz | 7/8 cup | 207 ml |
| 8 fl oz | 1 cup | 236.6 ml |
| 12 fl oz | 1.5 cups | 354.9 ml |
| 16 fl oz | 2 cups | 473.2 ml |
| 32 fl oz | 4 cups | 946.4 ml |
Dry Ounces to Cups — Common Baking Ingredients
Dry ounces measure weight, not volume. This means 1 cup of flour weighs fewer ounces than 1 cup of sugar. Always check your ingredient when converting dry ounces to cups.
| Ingredient | 1 oz = | 2 oz = | 4 oz = | 8 oz = |
|---|---|---|---|---|
| All-purpose flour | 0.24 cups | 0.47 cups | 0.95 cups | 1.9 cups |
| Granulated sugar | 0.14 cups | 0.28 cups | 0.57 cups | 1.13 cups |
| Brown sugar (packed) | 0.13 cups | 0.26 cups | 0.52 cups | 1.03 cups |
| Butter | 0.13 cups | 0.25 cups | 0.5 cups | 1 cup |
| Rolled oats | 0.31 cups | 0.63 cups | 1.25 cups | 2.5 cups |
| Cocoa powder | 0.33 cups | 0.67 cups | 1.33 cups | 2.67 cups |
How to Correctly Measure Ounces
- For liquids — use a liquid measuring cup. Set it on a flat surface, pour to the fl oz marking, and read at eye level for accuracy.
- For dry ingredients — use a kitchen scale. Measuring dry ounces by weight on a digital scale is always more accurate than trying to convert to cups mentally.
- Never use a liquid measuring cup for dry ingredients. The markings are calibrated for liquids and will give inaccurate dry weight readings.
- Tare (zero) your scale before adding each ingredient to avoid cumulative errors when measuring multiple items.
Oz to Cups — Quick Reference Chart
| Ounces | Cups | Tablespoons |
|---|---|---|
| 1 oz | 1/8 cup | 2 tbsp |
| 2 oz | 1/4 cup | 4 tbsp |
| 4 oz | 1/2 cup | 8 tbsp |
| 6 oz | 3/4 cup | 12 tbsp |
| 8 oz | 1 cup | 16 tbsp |
| 16 oz | 2 cups | 32 tbsp |
| 32 oz | 4 cups | 64 tbsp |
For tablespoon conversions see our guide on how many tablespoons in a cup. For ml conversions see how many ml in a cup. For a complete ounces guide see how many ounces in a cup.
Frequently Asked Questions
How many cups is 4 oz?
4 fluid ounces = 1/2 cup. For dry ingredients, 4 oz varies by ingredient — 4 oz of flour is approximately 0.95 cups, while 4 oz of sugar is approximately 0.57 cups.
Is 8 oz always equal to 1 cup?
Only for fluid ounces. 8 fluid ounces always equals exactly 1 US cup for any liquid. For dry ingredients, 8 dry ounces only equals 1 cup if the ingredient weighs exactly 8 oz per cup — which butter does, but flour and sugar do not.
How many cups is 16 oz?
16 fluid ounces = 2 cups. A standard US pint is 16 fl oz or exactly 2 cups. For dry weight, 16 oz (1 pound) of flour equals approximately 3.6 cups.
📌 Summary — Oz to Cups
• 1 fl oz = 1/8 cup
• 2 fl oz = 1/4 cup
• 4 fl oz = 1/2 cup
• 6 fl oz = 3/4 cup
• 8 fl oz = 1 cup
• 16 fl oz = 2 cups
Related: Ounces in a cup · Tablespoons in a cup · Tablespoon to ml
