The number of cups in 12 ounces depends on what you are measuring.

1. When measuring fluids like water, milk, or other liquids, 12 fluid ounces is equivalent to 1.5 cups. This is because 1 cup is equal to 8 fluid ounces, so 12 fluid ounces divided by 8 equals 1.5 cups.

2. However, if you're measuring a dry ingredient like flour or sugar, 12 ounces will vary in cups based on the density of the ingredient. For instance, 12 ounces of all-purpose flour is approximately 2.25 cups, while 12 ounces of granulated sugar is about 1.5 cups.

Therefore, it's essential to clarify whether you are referring to fluid ounces or ounces by weight when converting to cups.