One cup of a dry ingredient does not always weigh 8 ounces because density varies. For example: All-purpose flour: 1 cup ≈ 4.4 to 4.5 ounces. Granulated sugar: 1 cup ≈ 7 ounces. Butter: 1 cup ≈ 8 ounces. Common Conversions (US Standard) Fluid Ounces International Differences Standard cup sizes differ by region: How Many Ounces In A Cup - Loving It Vegan
In the United States, there are in one standard cup. how many ounces in a cup
However, the exact answer can vary depending on what you are measuring and the country's standard: Volume vs. Weight One cup of a dry ingredient does not