Use the ml/hr to mcg/kg/min Calculator below to either (1) calculate the dose (mcg/kg/min) from rate + total drug + total volume + weight, or (2) solve for a missing value by entering a desired dose plus the other three values.

ml/hr to mcg/kg/min Calculator


Enter Rate, Total drug, Total volume, and Weight, then click Calculate.



Enter the total drug amount in the entire bag/syringe (not the concentration).


Concentration is calculated as Total drug ÷ Total volume.



Concentration: —

Medical disclaimer: For educational use only; not medical advice. Do not use this tool as the sole source to dose medications. Always verify units and calculations and follow your clinician/pharmacist guidance, facility protocols, and the medication’s prescribing information (extra caution in pediatrics, pregnancy, renal/hepatic impairment, and critical care/high-alert infusions).

mcg/kg/min From ml/hr Formula

The following formula is used to calculate the mcg/kg/min From ml/hr.

mcg/kg/min = R * MCG / (FV * W* 60)

Variables:

  • mcg/kg/min is the dose (mcg/kg/min)
  • R is the infusion rate (ml/hr) 
  • MCG is the total drug amount in the bag/syringe (mcg) 
  • FV is the total bag/syringe volume (ml) 
  • W is the patient weight (kg)
mL/hr to mcg/kg/min Conversion Table (Assumes concentration = 4 mg in 250 mL → 16 mcg/mL; patient weight = 70 kg)
mL/hr mcg/kg/min
20.008
30.011
40.015
50.019
7.50.029
100.038
120.046
150.057
180.069
200.076
250.095
300.114
350.133
400.152
450.171
500.190
600.229
750.286
900.343
1000.381
* Rounded to 3 decimals. Assumes concentration = 4 mg in 250 mL (16 mcg/mL) and patient weight = 70 kg. Formula: mcg/kg/min = (Concentration [mcg/mL] × Rate [mL/hr]) / (60 × Weight [kg]). Adjust values if your concentration or weight differ.

How to Calculate mcg/kg/min From ml/hr?

The following steps outline how to calculate the mcg/kg/min From ml/hr.

  1. First, determine the infusion rate (ml/hr).
  2. Next, determine the total drug amount in the bag/syringe (mcg). 
  3. Next, determine the total bag/syringe volume (ml). 
  4. Next, determine the patient weight (kg).
  5. Next, gather the formula from above = mcg/kg/min = R * MCG / (FV * W* 60).
  6. Finally, calculate the mcg/kg/min From ml/hr.
  7. After inserting the variables and calculating the result, check your answer with the calculator above. 

Example Problem:

Use the following variables as an example problem to test your knowledge.

rate (ml/hr) = 10

total drug in bag (mcg) = 4000 (i.e., 4 mg)

total bag volume (ml) = 250

weight (kg) = 70

mcg/kg/min = R * MCG / (FV * W* 60) =  ?