20 drops equals how many mL?

• A. 0.5 mL
• B. 1 mL
• C. 2 mL
• D. 5 mL

Answer: (B)

When dosing liquids, use the standard drop-to-milliliter conversion: 1 mL equals 20 drops. So 20 drops convert to 1 mL. This assumes a calibrated medical dropper, since drop size can vary. If you have 10 drops, that would be about 0.5 mL; 40 drops would be about 2 mL; 100 drops would be about 5 mL. Therefore, 20 drops = 1 mL.