NAPLEX in the Car

Concentration calculations are among the most fundamental skills tested on the NAPLEX, but the different ways concentrations are expressed can make simple problems surprisingly confusing. In this episode, we break down percent strength, weight-to-volume concentrations, and ratio strength using straightforward examples you can work through mentally. You’ll learn how to recognize what a percentage actually means and how to convert between percent and ratio strength. We’ll also work through several NAPLEX-style calculations and identify common exam traps. By the end, you should be able to look at a concentration problem and quickly determine what the numbers are telling you.

Pharmacy calculations become much easier when you stop treating every problem as a new formula. This episode builds a systematic approach to units, doses, concentrations, and conversions that can be applied across many NAPLEX calculation problems. The central rule is simple: let the units guide you