Free calculator
IV drip rate calculator
Enter the volume, time, and tubing drop factor for a gravity infusion. See the drip-rate formula for the method.
Drip rate
31 gtt/min
1. Start from the flow rate and multiply by the drop factor
( 1000 mL ÷ 480 min ) × ( 15 gtt ÷ 1 mL )
2. Cancel mL and solve
= ( 1000 × 15 ) ÷ 480 gtt/min
= 31.25 gtt/min
3. Round to whole drops (you cannot count part of a drop)
31.25 gtt/min ≈ 31 gtt/min
= 31 gtt/min