IV Drip Rate Calculator
Calculate drops per minute and mL per hour for IV fluid administration based on volume, time, and drop factor.
Medical Disclaimer
This calculator is for informational and educational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider before making decisions about your health. Never disregard professional medical advice or delay seeking it because of results from this tool.
Inputs
Typical maintenance: 100–125 mL/hr; bolus: 500–1,000 mL over 1–4 hr per clinical order
Macrodrip: 10, 15, or 20 gtt/mL; microdrip: 60 gtt/mL for pediatrics or precision dosing
Results
Flow Rate
125mL/hr
Drip Rate
41.7gtt/min
How to Use This Calculator
- Enter total IV volume (mL), infusion duration (hours or minutes), and drop factor (gtts/mL) for gravity sets.
- Review drip rate in gtts/min and mL/hr for infusion pump programming.
How the result changes with Infusion Time
| Infusion Time | Flow Rate | Drip Rate |
|---|---|---|
| 7.29 | 137.2mL/hr | 45.7gtt/min |
| 25 | 40mL/hr | 13.3gtt/min |
| 47 | 21.3mL/hr | 7.1gtt/min |
| 65 | 15.4mL/hr | 5.1gtt/min |
What each input means
- Total Volume
- Total volume of IV fluid to be infused. Formula: drip rate (gtt/min) = (volume × drop factor) ÷ (time in minutes). Standard maintenance IV rate is typically 100–125 mL/hr for adults.
- Infusion Time
- Duration over which the fluid should be infused.
- Drop Factor
- Drops per mL calibration of the IV administration tubing. Macrodrip sets: 10, 15, or 20 gtt/mL for routine infusions. Microdrip sets: 60 gtt/mL for pediatrics, small volumes, or precise medication delivery.
How this is calculated
Worked example, using the default values
- Identify Input ParametersTotal Volume = 1000, Infusion Time = 8, Drop Factor = 20 = 3 input(s) provided
- Calculate Flow RateFlow Rate125 = 125
- Calculate Drip RateDrip Rate41.7 = 41.7
- Calculate Total DropsTotal Drops20000 = 20000
- Calculate Total TimeTotal Time480 = 480
Engine last updated .
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