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IV Flow & Drip Rate Calculator

mL/hour and drops/minute from volume, time and the giving set's drop factor.

For healthcare professionalsIV, fluids & infusionv1.0.0

For healthcare professionals / clinical use. Not a self-diagnosis tool.

Your measurements

mL
hours
Drop factor (giving set)

Calculated on your device. Nothing is sent to a server.

Your result will appear here

Enter your measurements, then press Calculate.

Methodology

Infusion rate arithmetic

mL/h = volume ÷ hours; drops/min = volume × drop factor ÷ minutes

Check the drop factor printed on the giving set packaging.

Who it is for
Gravity or pump infusions in adults and children.
Version
1.0.0

Worked example: how to calculate IV drip rate

Inputs

Volume to infuse
1,000 mL
Infusion time
8 hours
Drop factor (giving set)
20 drops/mL (standard)

Result

Flow rate
125 mL/h
Drip rate
42 drops/min

An illustration with sample values, worked out with the same method the tool above uses.

Limitations

  • Arithmetic aid only: always follow the prescription, local protocol and smart-pump drug library, and have high-risk infusions independently double-checked.

References

  1. Olsen JL, Giangrasso AP, Shrimpton DM. Medical Dosage Calculations. 12th ed. Hoboken, NJ: Pearson; 2020.
  2. Institute for Safe Medication Practices. ISMP Guidelines for Optimizing Safe Implementation and Use of Smart Infusion Pumps. Horsham, PA: ISMP; 2020. https://www.ismp.org/guidelines/safe-implementation-and-use-smart-pumps

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