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Cooking conversion
Cups of Butter to Ounces
How many ounces are in cups of butter? Type a value below to see the result instantly. Cooking conversions depend on the density of each ingredient — the math here uses 0.959 g/mL for butter.
Calculator
1 cup of butter = 8.0032 oz
Cups of Butter to Ounces Conversion Table
Common values for butter:
| Cups of butter | Ounces |
|---|---|
| 0.25 cup | 2.0008 oz |
| 0.5 cup | 4.0016 oz |
| 1 cup | 8.0032 oz |
| 2 cup | 16.0065 oz |
| 3 cup | 24.0097 oz |
| 4 cup | 32.0129 oz |
| 5 cup | 40.0162 oz |
| 8 cup | 64.0259 oz |
| 10 cup | 80.0323 oz |
How this works
Butter has a density of about 0.959 g/mL (standard: 1 cup = 227g). That means 1 mL of butter weighs 0.959 grams.
Ounces = cups × 8.0032
Note: Salted or unsalted; same density. 1 stick = 1/2 cup = 113g.
Why a cup of butter doesn't always weigh the same
Volume measurements are forgiving in some ways and brutal in others. A cup of butter can vary by 10-20% in weight depending on how it's measured: spooned vs scooped, packed vs loose, sifted vs unsifted. The density figure used here matches the most common published recipe conventions, but if you're after baking precision, weighing on a kitchen scale is more accurate than measuring by volume.