# Nursing

Nurse Math Calculators
Calculators to solve nursing math problems with formulas and examples included. Each calculator, along with examples and formulas, provides a unique way to review nursing math.
GlobalRPH
Additional and more specific dosage calculators are available at GlobalRPH.
Nurse Math Cheat Sheet
All the nurse math medication and IV formulas listed on one page to study from.

## Apothecary, Household, Metric Equivalents, IV Infusions

### Liquid

• 1 = 30
• ½ = 15

• 2½ = 10
• 2 = 8
• 1¼ = 5
• 1 = 4

#### others

• 1 min = 1 gtt
• 1 T (tbsp) = 15 mL
• 1 t (tsp) = 5 mL
• 1 mL = 1 cc

• 45 = 3
• 30 = 2
• 15 = 1
• 12 = 0.75
• 10 = 0.6
• 8 = 0.5
• 5 = 0.3
• 4 = 0.25
• 3 = 0.2
• 1½ = 0.1
• 1 = 0.06
• ¾ = 0.05
• ½ = 0.03

• 15 = 1000
• 10 = 600
• 7½ = 500
• 5 = 300
• 4 = 250
• 3 = 200
• 2½ = 150
• 2 = 120
• 1½ = 100
• 1 = 60
• ¾ = 45
• ½ = 30
• ⅓ = 20
• ¼ = 15
• ⅙ = 10
• ⅛ = 8
• 1⁄10 = 6
• 1⁄15 = 4
• 1⁄20 = 3
• 1⁄30 = 2
• 1⁄40 = 1.5
• 1⁄60 = 1
• 1⁄100 = 0.6
• 1⁄120 = 0.5
• 1⁄150 = 0.4
• 1⁄200 = 0.3
• 1⁄250 = 0.25

### List of Common Drug Infusions and How They Are Given

Medication Dosage
Aminophylline 0.5–0.7 mg/kg/hr
Amrinone 5–15 mcg/kg/min
Amiodarone 0.5 mg/min × 24 hrs
Bretylium 1–2 mg/min
Diltiazem 5–15 mg/hr
Dobutamine 2–20 mcg/kg/min
Dopamine 1–20 mcg/kg/min
Epinephrine 2–10 mcg/min
Esmolol 0.05 mg/kg/min
Isoproterenol 2–10 mcg/min
Labetalol 2–8 mcg/min
Lidocaine 30–50 mcg/kg/min or
2–4 mg/min
Magnesium SO4 0.5–1 g/hr × 24 hrs
Nitroglycerin 10 - 20 mcg/min
Nitroprusside 0.1–5 mcg/kg/min
Norepinephrine 0.5–30 mcg/min
Procainamide 1–4 mg/min

## References

Many of the formulas used in the calculators were obtained from:

• Munday, L. D., & Curren, A. M. (1990). Math for meds: Dosages and solutions. (6th ed.). San Diego, CA: Wallcur Inc.
• Nagelhout, J. J., & Zaglaniczy, K., L. (2001). Nurse anesthesia (2nd ed.). Philadelphia: W.B. Saunders Co.
• Nagelhout, J. J., Zaglaniczy, K., L., & Haglund, V., L. (2001). Handbook of nurse anesthesia (2nd ed.). Philadelphia: W.B. Saunders Co.

Drug information obtained from:

• American Heart Association. (1997). 1997-99 Handbook of emergency cardiovascular care for healthcare providers. Dallas, TX: Author.
• Chohan, N., Doyle, R. M., & Johnson, P. H. (Eds.). (1999). Nursing 2000 drug handbook. Springhouse, PA: Springhouse Corporation.
• Miller, R. D. (Ed.). (2000). Anesthesia. (5th ed.). Philadelphia: Churchill Livingstone.
• Morgan, G. E., Jr., & Mikhail, M., S. (1996). Clinical anesthesiology. (2nd ed.). New York: Lange Medical Books/McGraw-Hill