What is the equivalent of 1 ounce in milliliters?

To determine the equivalent of 1 ounce in milliliters, it's important to know the conversion factor used between these two units. Specifically, 1 ounce is commonly accepted as being equal to approximately 29.57 milliliters.

When rounding this value, it is often simplified to about 30 milliliters for practical purposes, which aligns with the conversion most frequently used in cooking and general references. Therefore, the most accurate and commonly used approximation for 1 ounce is 30 milliliters, making this option the correct answer.

This conversion is particularly useful in various fields such as cooking, nutrition, and medicine, where precise measurements are important. Thus, understanding that there are about 30 milliliters in an ounce can help in accurately converting recipes or medication dosages.