Determine infusion drip rate from volume, time, and tubing drop factor.
Drip rate (gtt/min) = (Volume in mL × Drop factor) / (Time in minutes). Flow rate (mL/hr) = Volume / Time in hours. Macro drip sets (10, 15, or 20 gtt/mL) are used for larger volumes; micro drip (60 gtt/mL) provides precise control for pediatric or critical care infusions.