IV infusion rate calculator
Calculate rate (mL/h), dose rate, total dose, or infusion time.
Frequently asked questions
How do I calculate an IV infusion rate from a dose in mcg/kg/min?
Rate (mL/h) = [dose (mcg/kg/min) × weight (kg) × 60] / concentration (mcg/mL). This calculator handles the conversion. For reference on vasopressor and inotrope infusions, see NCBI critical care pharmacotherapy and DailyMed labels for approved concentration ranges.
What is a standard concentration for dopamine?
A common standard: dopamine 400 mg / 250 mL NS = 1,600 mcg/mL. Always verify against your institution's pharmacy label — concentrations vary. ISMP's standard concentration guidelines cover neonatal and paediatric IV medications. DailyMed has dopamine prescribing information.
How do I calculate total dose from an infusion?
Total dose (mg) = rate (mL/h) × concentration (mg/mL) × duration (h). Useful for cumulative dose tracking — e.g., aminoglycosides, IV contrast. See FDA drug safety communications for IV drug safety guidance.
What is a drop factor (drip factor) and when does it matter?
Drop factor is gtt/mL for an IV set: macrodrip sets = 10/15/20 gtt/mL; microdrip = 60 gtt/mL. Drip rate (gtt/min) = [volume (mL) × drop factor] / time (min). Used when pumps are unavailable. For patient safety around IV medications, see ISMP IV medication safety resources.