There are 8 fluid ounces (fl oz) in 1 US cup. This is the standard conversion used in cooking and liquid measurements in the US customary system

. To summarize:

• 1 cup = 8 fluid ounces
• 1/2 cup = 4 fluid ounces
• 1/4 cup = 2 fluid ounces
• 3/4 cup = 6 fluid ounces

This conversion applies specifically to fluid ounces, which measure volume, not weight. The US cup is approximately 236.6 milliliters, and one fluid ounce is about 29.57 milliliters