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Infusion Rate from Dose (mL/h)

Pump rate in mL/h for a prescribed dose and a known concentration (mcg/kg/min, mg/h, units/h …).

For healthcare professionalsIV, fluids & infusionv1.0.0

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

Your measurements

Dose unit
mL

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

Your result will appear here

Enter your measurements, then press Calculate.

Methodology

Dose-to-rate conversion

mL/h = dose per hour (mg or units) ÷ concentration (mg or units per mL); mcg converted to mg (÷ 1000)

For mcg-based doses, the drug amount must be entered in mg.

Who it is for
Continuous infusions with a prescribed dose and a prepared concentration.
Version
1.0.0

Worked example: how to calculate dose → mL/h

Inputs

Prescribed dose
0.1
Dose unit
mcg/kg/min
Weight
70 kg
Drug in the bag/syringe (mg, or units)
4
Total volume
50 mL

Result

Pump rate
5.25 mL/h
Concentration
0.08 per mL (mg or units)

Calculation:

0.1×70×60/1000 = 0.42 mg/h ÷ 0.08 mg/mL = 5.25 mL/h

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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