Dosage calculation is a critical skill for Licensed Practical Nurses (LPNs), encompassing a range of mathematical concepts and practical applications. Foundational to this skill are the understanding and conversion between standard, metric, and household measurement systems. LPNs must be proficient in calculating oral, injectable (including subcutaneous, intramuscular, and powdered reconstitution), and intravenous doses, whether administered via pump or drops. Furthermore, they need to accurately determine dosages for topical medications. A thorough understanding of medication administration equipment is essential, ensuring safe and effective delivery of prescribed treatments.