IV Flow Rate Calculator

Your details

The total volume of IV fluid ordered, in millilitres.
mL
Whole hours portion of the ordered infusion time.
hr
Additional minutes portion of the ordered infusion time (0-59).
min
Read the gtt/mL value from your IV tubing package. Macrodrip sets deliver 10-20 gtt/mL; microdrip sets deliver 60 gtt/mL.
Drip rateRate within typical range
41.7gtt/min

Drops per minute to set at the roller clamp

Flow rate125mL/hr
Drops per hour2,500gtt/hr
Flow rate (mL/min)2.083mL/min
Total infusion time480min
Drops per 15 seconds10.4gtt/15 s
Drops per 30 seconds20.8gtt/30 s
41.7 gtt/min
Very slow<5Slow / microdrip5-60Moderate60-125Fast125-200Very fast200+

Drip rate: 41.7 gtt/min (125.0 mL/hr)

  • Set your IV pump to 125.0 mL/hr, or manually adjust the roller clamp to 41.7 gtt/min.
  • To verify manually, count 10.4 drops over 15 seconds (or 20.8 drops over 30 seconds) and adjust the clamp accordingly.
  • The infusion is scheduled to run for 8 hours (480 minutes).

Next stepAlways verify the calculated rate against the physician order and your institution protocol before adjusting the infusion.

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