Free CPhT Tool
PTCB Calculations Practice — Free Problems With Worked Solutions
Dosage, days supply, concentrations, dilutions, IV flow rates, and business math — the math that trips up the most candidates, broken down step by step.
Calculations are the part of the PTCE most candidates fear most — and the fastest to improve with the right practice. Every problem here comes with a full worked solution, so you don’t just find out that you were wrong, you learn why. Nearly 1 in 3 test-takers don’t pass on their attempt (PTCB, 2025) — calculations are where a lot of those points are won or lost.
Why it works
Every step shown.
No “the answer is 12 mL” and nothing else. Each solution walks the full method so you can reproduce it under pressure.
Five calc types.
Dosage, days supply, concentration/dilution, IV flow rates, and pharmacy business math — organized so you can drill your weak area.
Built to reduce test-day panic.
Repeated, patterned practice turns “I hope I remember the formula” into muscle memory.
See your progress.
A free account saves your history and flags the calc types you keep missing.
Frequently asked
What kind of math is on the PTCB?
Primarily dosage, days supply, concentrations/dilutions, ratio & proportion, IV flow rates, and basic pharmacy business math — all covered here.
Do I need a calculator?
No — you won’t need to bring one. The testing center provides a basic calculator for the PTCE, and these problems are built to match that.
Are the solutions really step-by-step?
Yes — every problem includes the full method, not just the final answer.