PassMedMath

Pass your exam on the first try.

Free unlimited pharmacy calculations practice with instant worked solutions. Every problem is procedurally generated — you will never run out.

Covering 44 calculation types across 12 categories for NAPLEX, PTCB, and NCLEX exam prep. Filter by exam or browse all topics below.

Foundations & Conversions

Unit conversions, measurement systems, and foundational math for all healthcare exams.

Tablet counts, liquid doses, reconstitution, and days supply calculations.

Calculate doses based on body weight, surface area, and ideal body weight.

Calculate flow rates, pump settings, and infusion times for IV medications.

Concentrations, dilutions, alligation, and compounding formulas.

Milliequivalent, millimole, and osmolarity calculations for electrolyte dosing.

Adjust reported lab values for clinical factors like albumin, glucose, and renal function.

Half-life, clearance, volume of distribution, loading and maintenance dosing.

Calculate TPN components, calories, and macronutrient requirements.

Convert between equianalgesic and equivalent doses of medications.

Calculate study endpoints, diagnostic test performance, and clinical significance.

Built by a licensed clinical pharmacist. Every answer is derived, never authored.