PassMedMath

Pass your exam on the first try.

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

Covering 19 calculation types across 8 categories for NAPLEX, PTCB, and NCLEX exam prep. Filter by exam or browse all topics below.

IV & Infusion Calculations

Calculate flow rates and pump settings for intravenous medications.

IV Drip RateNAPLEXPTCBNCLEXIV Pump RateNAPLEXNCLEX

Dosing Calculations

Determine medication doses based on patient-specific factors.

Weight-Based DosingNAPLEXPTCBNCLEXBSA DosingNAPLEXNCLEXIdeal Body WeightNAPLEXDays SupplyNAPLEXPTCB

Solutions & Compounding

Calculate concentrations, dilutions, and compounding formulas.

Percentage StrengthNAPLEXPTCBAlligationNAPLEXPTCBDilution & ConcentrationNAPLEXPTCB

Electrolytes & Lab Values

Interpret and correct laboratory values for clinical decision-making.

MilliequivalentsNAPLEXPTCBCorrected CalciumNAPLEXCorrected SodiumNAPLEXAnion GapNAPLEX

Clinical Pharmacokinetics

Apply pharmacokinetic principles to drug dosing and monitoring.

Creatinine ClearanceNAPLEXNCLEXPhenytoin CorrectionNAPLEX

Parenteral Nutrition

Calculate TPN components and caloric requirements.

TPN CaloriesNAPLEX

Drug Conversions

Convert between equianalgesic doses of opioid medications.

Opioid ConversionsNAPLEX

Biostatistics

Calculate study endpoints and diagnostic test performance metrics.

NNT / NNH / ARR / RRRNAPLEXSensitivity & SpecificityNAPLEX

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