All or nothing scoring · 50 questions in 10 sets
NCLEX Dosage Calculation Practice Questions
Free dosage and drug calculation practice for nurses: conversions, weight-based and pediatric doses, IV rates and heparin, each with a worked answer. No sign-up.
The format
What is a Dosage Calculation question on the NCLEX?
Free dosage calculation practice for nursing students and nurses: NCLEX-style med math practice problems in 10 sets, from unit conversions to heparin and mcg/kg/min drips. Each question asks you to type a number, and the stem tells you how to round.
The on-screen calculator is available in the tool bar, just as on test day.
Practice sets
Nursing dosage calculations: 10 practice sets by skill
One skill per set, from conversions to critical care drips. Every set is free and opens in the NCLEX-style test interface: type each answer, submit it and read the worked answer.
Sample question
Med math practice: try a dosage calculation problem
Open the sample to see the format on the exam screen, with the correct answer marked and the reason each option is right or wrong. To answer questions yourself, start a set above.
Sample question: answer and rationaleA 52-year-old client seen in an endocrine clinic for hypothyroidism is prescribed levothyroxine 0.088 mg PO daily. The pharmacy supplies tablets labeled in mcg. How many mcg does the prescribed dose equal? Round to the nearest tenth. Record your answer using 1 decimal place.
A 52-year-old client seen in an endocrine clinic for hypothyroidism is prescribed levothyroxine 0.088 mg PO daily. The pharmacy supplies tablets labeled in mcg. How many mcg does the prescribed dose equal? Round to the nearest tenth. Record your answer using 1 decimal place.
Your answer: 88Correct answer: 88 mcg
Correct answer and rationale
Dosage Calculation · All or nothing scoring
A milligram is 1,000 times larger than a microgram, so changing mg to mcg makes the number bigger: multiply by 1,000.
0.088 mg × 1,000 mcg/mg = 88 mcg.
Moving the decimal point three places to the right gives the same result. The answer is exact, so it is written as 88 mcg with no trailing zero.
Common errors are dividing by 1,000, which gives 0.000088, and moving the decimal only two places, which gives 8.8 mcg, a tenfold underdose. Sense check: levothyroxine tablets are labeled in mcg, and 88 mcg is a marketed tablet strength.
Takeaway: mg to mcg goes from a larger unit to a smaller one, so multiply by 1,000 and expect the bigger number.
Sources
Formulas
Dosage calculation formulas for nurses (drug calculations)
Most dosage calculations come down to a handful of formulas. Convert to matching units first, round only at the end, and follow the rounding the question gives. Each formula links to a practice set that drills it.
Scoring
How Dosage Calculation questions are scored
Scored all or nothing: the number must match the correct answer after the rounding the question specifies.
Scoring rules: NCSBN, Next Generation NCLEX. Last reviewed October 13, 2026.
How to answer Dosage Calculation questions
- Round only at the end of the calculation unless the question says otherwise.
- Type only the number. The unit is already shown next to the answer box.
- Do a quick common-sense check: would this dose or rate actually be safe for this client?
FAQ
Dosage Calculation questions: FAQ
Is there a calculator on the NCLEX?
How should I round on NCLEX calculation questions?
Is there math on the NCLEX?
Is med math the same as dosage calculation?
Where can I find dosage calculation practice problems with answers?
Keep practicing
Other NCLEX question types
Next practice exercise
Pick up the set you started, or go on to the next question type. Every set opens in the NCLEX-style test interface.
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