Understanding how many ounces of milk are in a cup requires knowledge of volume measurement. The US customary system uses ounces (oz) and cups (c), while the metric system employs milliliters (ml) and liters (L). Ounces and fluid ounces (fl oz) are interchangeable in volume measurement, with 1 fl oz equaling 1 oz. A typical standard cup contains 8 fluid ounces or 236.59 milliliters. Common milk types include whole, reduced-fat, low-fat, and nonfat milk, each with varying fat content. Special milk products like evaporated, condensed, and powdered milk have altered water content, making volume conversions different from regular milk.