Calculate IV infusion rates in mL/h and drops per minute from volume and time, or from weight-based doses like mcg/kg/min, and check the dose a rate delivers.
IV rates in mL/h and drops/min, including weight-based drips.
How to use IV Infusion Rate Calculator
Choose rate from volume and time, rate from a dose, or dose from a rate.
Enter the volume and time, or the dose, drug amount, bag volume and weight.
Read the pump rate in mL/h and the drip rate in drops per minute.
Worked example
5 mcg/kg/min for a 70 kg patient from 400 mg in 250 mL runs at 13.1 mL/h.
What drop factor should I use?
Check the giving set packaging: standard sets are usually 20 drops/mL (15 in some countries), blood sets 10–15 and microdrip sets 60.
How is mcg/kg/min converted?
Dose × weight × 60 gives mcg per hour, which is divided by the concentration in mcg per mL.
Can I use this to make treatment decisions?
It supports education and clinical decision-making but does not replace clinical judgment, local protocols or product information. Always double-check results.