nurse math formulas

Question 1

Temperature conversion from Celsius to Fahrenheit

Answer 1

F= 1.8(C) + 32

Question 2

Temperature conversion from Fahrenheit to Celsius

Answer 2

C= F - 32/1.8

Question 3

Oral/Parenteral Dosages

Answer 3

D/H x Q

Question 4

Child dose based on Adult Dose

Answer 4

BSA/1.7 x Adult dose = estimated child dosage

Question 5

Body surface area using metric system

Answer 5

square root of weight (kg) x height (cm) / 3600

Question 6

Body surface area using apothecary system

Answer 6

square root of weight (lbs) x height (in) / 3131

Question 7

calculating IV drop rate

Answer 7

xgtt/min= Volume (mL) x drop factor (gtt/mL) / Time (min)

Question 8

Calculating Infusion Time

Answer 8

Volume (mL) / Rate (mL/hr) = Time (hrs)

Question 9

Calculating Infusion Rate

Answer 9

Volume (mL) / Time (hrs) = Rate (mL/hr)

Question 10

mL/hr is what

Answer 10

Total volume/#hrs

Ex. 2000 mL/ 12hrs = 167 mL/hr

Question 11

hrs (how long is this going to infuse for?)

Answer 11

Total volume/ mL/hr

Ex. 2000/167

Question 12

gtt/min = ?

Answer 12

mL/min X gtt/min

Ex. 2000/60(1hr) or however many hrs you need to convert to min X 10gtt/mL