IV Flow Rate Calculator
Calculate infusion flow rate (mL/hr) and drip rate (gtts/min) based on volume, time, and drop factor. Essential for precise IV administration.
Step 1: Infusion Prescription
Understanding drop factors
Macrodrip tubing typically delivers 10, 15, or 20 gtts/mL. Microdrip tubing delivers 60 gtts/mL, used for precise or low flow rates.
Step 2: Additional Options
Formula reminder
Flow rate (mL/hr) = Volume (mL) / Time (hr)
Drip rate (gtts/min) = (Volume (mL) / Time (min)) × Drop factor (gtts/mL)
IV Flow Rate Results
Flow Rate (mL/hr)
Drip Rate for Common Drop Factors
| Tubing type | Drop factor (gtts/mL) | Drip rate (gtts/min) | Flow rate (mL/hr) |
|---|
* Drip rates are rounded to nearest whole number for clinical convenience.
Infusion Formula & Clinical Tips
Flow rate (mL/hr) = Volume (mL) / Time (hr)
This is the primary pump setting. If time is given in minutes, convert by dividing minutes by 60.
Drip rate (gtts/min) = (Volume ÷ Time in minutes) × Drop factor
Use this when administering via gravity infusion. Always round to the nearest whole drop.
Visual comparison of drip rates with different drop factors (current volume/time).
Need help with IV calculations?
Our clinical resource center provides detailed guides, safe dosing charts, and practice problems for nurses and students.
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