Formulas

Question 1

Concentration (mg/ml) =

Answer 1

Amount of drug (mg)/amount of solution (mL)

Question 2

Volume/minute for IV push

mL/min =

Answer 2

Total volume (mL)/ Total time (minutes)

Question 3

Calculating mL/hr for IV pumps

mL/hr =

Answer 3

Amount of solution (mL) / time (hr)

Question 4

Calculating flow rates for under an hour

mL/hr =

Answer 4

Amount (mL) / time (minutes) X 60min/hr

Question 5

Calculating drops per minute

gtt/min =

Answer 5

Solution (mL) X drop factor / time (minutes)

*gtt/min = mL/hr when using a 60 gtt set

Question 6

Calculating mcg/kg/min

mL/hr =

Answer 6

Dose ordered (drug/kg/min) x weight (kg) ALL divided by concentration then multiplied by 60 min/hr

Question 7

mcg/minute

mL/hr =

Answer 7

Dose ordered (total amount of drug/min) / concentration of drug X 60 minutes/hr