Quick Answer
If 14 oz means US fluid ounces, it equals approximately 1.75 cups.
If 14 oz means ounces by weight, the answer depends on the ingredient. For example, 14 ounces by weight is about 3.18 cups of all-purpose flour, 1.98 cups of granulated sugar, and 1.75 cups of butter.
The first step is always to confirm whether the recipe means fluid ounces or weight ounces.