HMMM
Handy Medical Math Machine
Calculator

IV Drip Rate

Gravity infusion calculator. Computes drops per minute and ml per hour from total volume, duration, and the drop factor of your IV set.

gtt/min = (volume × drop factor) ÷ time (min)
ml
h
min
Macroset drop factors are printed on the IV chamber. Microsets (60 gtt/ml) are used for precise low-volume infusions, especially in pediatrics.
Drip rate
gtt / min
Flow rate
ml / hr
Enter volume, time and drop factor.