IV Drip Rate (gtt/min) Calculator
Enter the volume, infusion time and drop factor of the tubing.
Result
How to use
- Enter your values in the fields above.
- Press Calculate to see your result instantly.
- Use the Share button to copy a link to your result.
About this calculator
When an intravenous infusion is given by gravity rather than an electronic pump, nurses must set the flow manually by counting drops. The IV drip rate in drops per minute (gtt/min) is calculated as volume (mL) × drop factor (gtt/mL) ÷ time (minutes), where the drop factor depends on the tubing: standard macrodrip sets deliver 10, 15, or 20 gtt/mL, while microdrip sets deliver 60 gtt/mL for more precise, slower infusions.
The same inputs also give the equivalent flow rate in mL/hr, which is useful for cross-checking against a pump's programmed rate. This is routine bedside math for nurses and paramedics in hospitals, clinics, and ambulances — though as with any dosing calculation, it should always be verified against a physician's order and institutional protocol, and this tool is not medical advice.
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