Pharmacy Formula Cheat Sheet
Every essential calculation formula for pharmacy exams in one place. The first 2 sections are free — unlock all 7 sections with Premium.
Dose by Weight
Variables: Weight in kg, prescribed dose in mg/kg
Example: 70 kg × 5 mg/kg = 350 mg
Dose by BSA
Variables: BSA from nomogram or Mosteller formula
Example: 1.73 m² × 100 mg/m² = 173 mg
Mosteller BSA
Variables: Height in cm, Weight in kg
Example: √(170 × 70 / 3600) = 1.82 m²
Ideal Body Weight (Male)
Variables: Height in inches
Example: 50 + 2.3 × (70 − 60) = 73 kg
Ideal Body Weight (Female)
Variables: Height in inches
Example: 45.5 + 2.3 × (65 − 60) = 57 kg
Adjusted Body Weight
Variables: IBW = ideal, TBW = total body weight
Example: 73 + 0.4 × (100 − 73) = 83.8 kg
Clark's Rule (Pediatric)
Variables: Weight in pounds, adult dose
Example: (50 / 150) × 500 mg = 167 mg
Young's Rule (Pediatric)
Variables: Age in years, adult dose
Example: [6 / (6 + 12)] × 500 mg = 167 mg
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