Drip rate = milliliters × drip set/minutes of infusion
12 hours = 12 × 60
= 720 minutes
The Drip rate = 1000 × 15/720 minutes
= 20.8333
≈ 20.8 drops per minute
Drip rate refers to the number of Drops the IV solution is dripping at, measured in the number of drops per minute. Flow rate on the other hand is the amount of IV solution flowing into the vein in ml's per minute or hour.