Part 1
Pharmaceutical Calculations
Master all 12 calculation types required for the NAPLEX Part 1 assessment. Each exam includes at least one question from each category.
Questions
Time Allowance
Permitted
12 Categories
Calculation Types
Every NAPLEX Part 1 assessment includes questions from each of these calculation categories.
Doses and Dose Regimens
Calculate appropriate doses and dosing schedules
Dosage and Unit Conversions
Convert between different units and dosage forms
Estimations of Kidney Function
CrCl and eGFR for dosing adjustments
Displacement Volumes
Injections and suppositories calculations
Concentrations (w/v, %, 1 in x)
Work with different concentration expressions
Dilutions
Calculate dilutions and stock preparations
Molecular Weight
Calculate molecular weights and molar concentrations
Using Provided Formulae
Apply formulae given in exam questions
Infusion Rates
IV drip rates and infusion calculations
Pharmacokinetics
Clearance, half-life, and bioavailability
Health Economics
Cost-effectiveness and economic evaluations
Quantities to Supply
Pack sizes and prescription quantities
Essential Skills
What You'll Master
Numerical Accuracy
- Precise decimal calculations
- Appropriate rounding conventions
- Significant figures
- Error checking strategies
Clinical Application
- Real-world clinical scenarios
- Patient safety considerations
- BNF reference skills
- Dose verification
Ready to Master Calculations?
Practice with hundreds of calculation questions, each with step-by-step solutions.