How many fluid ounces are in one cup?

One cup is standardized to contain 8 fluid ounces in the customary measurement system commonly used in cooking and nutrition. This equivalence is fundamental for converting recipes and understanding portion sizes. The fluid ounce measurement helps in various applications, such as measuring liquids for proper hydration or ingredients in recipes. Understanding this measurement is essential for students as they develop their mathematical skills related to measurement and conversions in real-world contexts.