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The milliliter equivalent of 1 ounce is 30 mL. This conversion is based on the standard measurement where 1 fluid ounce is equal to approximately 29.57 mL. For practical purposes, this is commonly rounded to 30 mL. Understanding this conversion is essential in healthcare and clinical settings, where accurate medication dosing and fluid measurements are critical. Correctly converting ounces to milliliters ensures that patients receive appropriate dosages of medication and that fluid intake and output are accurately documented.