A physician orders 1/2 ounce of medication. How many milliliters is that?

A physician orders 1/2 ounce of medication. How many milliliters is that?

• A. 15 mL
• B. 5 mL
• C. 25 mL
• D. 10 mL

Answer: (A)

Converting between units is the key. For liquids in medical dosing, 1 fluid ounce is typically considered to be 30 milliliters. Half of 30 mL is 15 mL, so 1/2 ounce corresponds to 15 milliliters. If you use the exact conversion of 1 fl oz = 29.5735 mL, half would be about 14.79 mL, which still rounds to 15 mL in practice. So the dose in milliliters is 15 mL.

Converting between units is the key. For liquids in medical dosing, 1 fluid ounce is typically considered to be 30 milliliters. Half of 30 mL is 15 mL, so 1/2 ounce corresponds to 15 milliliters. If you use the exact conversion of 1 fl oz = 29.5735 mL, half would be about 14.79 mL, which still rounds to 15 mL in practice. So the dose in milliliters is 15 mL.