Infusion Rate Calculator
Calculate IV infusion rate in mL/hr or drops per minute based on desired dose, patient weight, and drug concentration
Results
Infusion Rate
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Drip Rate
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Total Dose per Hour
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Drug Concentration
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Frequently Asked Questions
How do I calculate IV infusion rate for weight-based dosing?
Use the formula: IV Rate (mL/hr) = (60 × Desired Dose × Weight × Bag Volume) ÷ (1000 × Drug Amount). This accounts for converting minutes to hours and micrograms to milligrams.
What's the difference between macrodrip and microdrip tubing?
Macrodrip tubing typically delivers 10-20 drops per mL and is used for standard adult infusions. Microdrip tubing delivers 60 drops per mL and provides more precise control for pediatric patients or when exact flow rates are critical.
How do I convert between mL/hr and drops per minute?
Use the formula: gtt/min = (mL/hr × drop factor) ÷ 60. For microdrip tubing (60 gtt/mL), the mL/hr equals gtt/min directly.
What safety checks should I perform before starting an IV infusion?
Always double-check calculations independently, verify the drug concentration, confirm patient weight, and follow facility protocols. When in doubt, consult with a pharmacist or physician.
How often should I monitor and adjust IV drip rates?
Monitor IV rates frequently according to facility policy and patient condition. Check the actual drip rate by counting drops and compare to the calculated rate. Adjust as needed and document changes.
Can I use this calculator for all IV medications?
This calculator is designed for continuous weight-based infusions. Always verify that the medication is appropriate for continuous infusion and follow specific drug administration guidelines.
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