To convert cups to ounces, you need to know the specific substance you're measuring, as different substances have different densities. However, for water or other similar liquids, the conversion is as follows:
1 cup = 8 fluid ounces
So, to convert 16 cups to fluid ounces:
16 cups * 8 fluid ounces/cup = 128 fluid ounces
Therefore, 16 cups is equal to 128 fluid ounces.