Medication Drug Calculations Self-Study Course
Despite all recent advances in medication administration, drug-related adverse events and error rates remain a concern. Many medication errors are related to administering incorrect dosages.
Often some type of calculation prior to medication administration is needed. Drug calculations can be simple or more complex. Regardless of the drug to be administered, careful and accurate calculations are necessary to help prevent medication errors. Practicing drug calculations will develop stronger and more confident math skills.
The purpose of this module is to provide Licensed Practical Nurses (LPNs) with an opportunity to practice medication drug calculations. This module will be of interest to any nurse – newly graduated or experienced – whose responsibilities include medication administration.
If you find that you are having difficulty with the practice quizzes and/or games, we recommend you engage in self-study or complete an educational course that will assist you in developing proficiency with medication drug calculation skills.This module consists of several practice quizzes, learning games and resources. The quizzes and games focus on six calculation areas: basic mathematics, metric conversions, tablet dosage, fluid dosage, injection dosage and infusion rates. To access a learning activity, simply click on the Link. After you have completed an activity, return to this page to proceed to the next activity.
Before you begin the practice quizzes and games, you should review these helpful tips about how to accurately calculate drug dosages:
Dosage Calculations Practice Quizzes *
Basic Mathematics – This quiz is designed to test and refresh your knowledge and skills of basic mathematics used in medication dosage calculations. (25 questions randomly selected from 100 items). (PDF/PRINT Versions: Quiz 1 | Quiz 2 | Quiz 3 | Quiz 4)
Metric Conversions – This quiz tests and reviews your knowledge of the metric system and how to accurately make conversions between the various units. (25 questions randomly selected from 60 items). (PDF/PRINT Versions: Quiz 1 | Quiz 2)
Tablet Dosage Calculations – Test and refresh your knowledge and skills about how to calculate the correct tablet medication dosages. (25 questions randomly selected from 50 items). (PDF/PRINT Versions: Quiz 1 | Quiz 2)
Fluid Dosage Calculations – This quiz is designed to assess and review your knowledge and skills in calculating the correct fluid dosages for medications. (25 questions randomly selected from 75 items). (PDF/PRINT Versions: Quiz 1 | Quiz 2 | Quiz 3)
Injection Dosage Calculations – Test and refresh your knowledge and skills in calculating the correct dosages for medication administration by injection. (25 questions randomly selected from 75 items). (PDF/PRINT Versions: Quiz 1 | Quiz 2 | Quiz 3)
Infusion Rate Calculations – This quiz assesses your knowledge and skills in calculating the correct intravenous (IV) dosages, flow rates and administration times. (25 questions randomly selected from 100 items). (PDF/PRINT Versions: Quiz 1 | Quiz 2 | Quiz 3 | Quiz 4)
Dosage Calculations Games **
Metric Measurements – This educational nursing game is designed to test and refresh your knowledge of metric volume and weight units used in nursing care. (15 questions randomly selected from 82 items).
Oral Dosages – A game about calculating the correct dosages for medications administered orally using solutions, suspensions, mixtures and syrups. (15 questions randomly selected from 35 items).
Tablet Dosages I – Review your skills about calculating the correct tablet dosages for medications and drugs. (15 questions randomly selected from 30 items).
Tablet Dosages II – A media-enhanced version of the game calculating correct tablet dosages for medications and drugs. (15 questions randomly selected from 30 items).
Final Examination *
Final Examination – This final exam consists of 60 randomly selected questions from a pool of 350 items. A printable CLPNA Certificate of Completion is available upon passing this exam with a score of 80% or better. If you are an Alberta LPN, please enter your Registration Number when requested. Everyone else, leave in the default number. If you want a copy of the Final Exam Results e-mailed to yourself (or anyone else), enter the appropriate e-mail address. Otherwise, leave it blank. (Results are ONLY e-mailed if you have passed the exam).
Medication Drug Calculation Module Evaluation – Please complete this online survey after finishing this Module. Your feedback and comments will greatly assist CLPNA in developing and delivering effective, quality nursing educational resources.
MacEwan University, NURS 0164 Medication Administration and Calculations
NorQuest College, XHLT1530 – Pharmacology Therapeutics and Medication Administration
Math Meeting (YouTube)
Lapham, R. (2015). Drug Calculations for Nurses: A Step-By-Step Approach, (4th ed.). Boca Raton, FL: CRC Press.
Mulholland, J. & Turner, S. (2015). The Nurse, The Math, The Meds: Drug Calculations using Dimensional Analysis, (3rd ed.). St. Louis, MS: Mosby.
Pickar, G.D., Pickar Abernethy, A., Swart, B., Graham, H., & Swedish, M. (2015). Dosage Calculations, (3rd ed.). Toronto, Canada: Nelson Education.
* The Practice Quizzes and Final Exam can be completed on regular browsers, tablets and smart phones. For iPhones and iPads, download and install the FREE iSpring viewer from the iTunes Store. For Android devices, iSpring Play is available here. The quizzes can also be downloaded and saved on your mobile device and completed off-line at your convenience.
** The Calculations Games can be played on regular browsers, tablets and mobile phones. For best viewing on Apple's devices, download and install the FREE Articulate Player App from the iTunes Store. If you are using an Android tablet or phone, download and install the FREE Android Player App from Google Play. The games can also be downloaded to your mobile device for off-line use.
To view and download the PDF/PRINT documents requires Adobe Acrobat Reader.
If you are using these quizzes / games / final exam for class assignments or continuing education credits, and want a copy of the Results for your records, enter your name when requested. Otherwise, use Guest and proceed with the quiz / game / exam.