Which is the correct conversion for 1 ounce?

The correct conversion of 1 ounce to milliliters is 29.57 mL. This figure stems from the definition of an ounce in terms of the metric system, where 1 US fluid ounce approximately equals 29.5735 milliliters. In practical situations, this is often rounded to 29.57 mL for ease of calculation and application in healthcare settings, making it a standard reference for dosing medications and understanding fluid measurements.

Understanding this conversion is particularly important in fields such as nursing and pharmacy, where precise measurements are critical for patient safety and effective medication administration. Knowing that 1 ounce is nearly 30 mL helps in quickly estimating dosages and converting between units when necessary.