Formulas

Question 1

Formula for Volume-related Dosage Orders

Answer 1

D/H x V = A

D = Desired
H = Dosage available
V = Volume the medication is available in
A = Amount needed for administration

Question 2

Formula for IV Flow Rates

Answer 2

1. mL of solution/total hours = mL/hr

If given in minutes
2. mL of solution/min x 60 (minutes) = mL/hr

If given drop factor
3. mL of solution/total mins. x drop factor = gtt/min