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Dosage calculation practice
Seven calculation skills, unlimited problems, graded instantly. Every solution shows the setup, how the units cancel and why the answer is rounded the way it is — because the method is the thing worth learning.
These are practice problems for exam preparation. Every number in them is generated by CARE for teaching purposes — nothing here is a real order and nothing here is a clinical dosing tool. Do not use this page to work out a dose for a real patient: use your facility's policy, the actual order, and an independent double-check where your policy requires one.
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Tablets and capsules
How many tablets to give when the ordered dose and the tablet strength differ.
Example: An order reads 750 mg. The medication is available as 500 mg tablets. How many tablets supply the ordered dose?
Practised by: RN · PN · MA
Practise this skillLiquid oral doses
How many millilitres of a liquid medication supply the ordered dose.
Example: An order reads 125 mg. The medication is supplied as 125 mg per 15 mL. How many millilitres supply the ordered dose?
Practised by: RN · PN · MA
Practise this skillMetric conversions
Converting between grams, milligrams and micrograms before you calculate.
Example: Convert 1000 mcg to mg.
Practised by: RN · PN · MA
Practise this skillWeight-based doses
Doses ordered per kilogram, including converting a weight given in pounds.
Example: A dose is ordered at 2 mg/kg. The person weighs 188 lb. What total dose does that order call for?
Practised by: RN · PN
Practise this skillIV pump rate (mL/hr)
Setting an infusion pump when a volume must run over a given time.
Example: 1000 mL is to infuse over 4 hours. What rate should the pump be set to?
Practised by: RN · PN
Practise this skillDrip rate (gtt/min)
Counting drops per minute for gravity tubing with a known drop factor.
Example: 50 mL is to infuse over 240 minutes using tubing with a drop factor of 60 gtt/mL. What is the drip rate?
Practised by: RN · PN
Practise this skillInfusion time
How long an infusion will take at a set rate.
Example: 900 mL is infusing at 150 mL/hr. How many hours will the infusion take?
Practised by: RN · PN
Practise this skillPractising for a specific exam?
Dosage questions appear inside real exam practice too, mixed with everything else and scored the way the rest of your practice is. Our NCLEX-RN and NCLEX-PN banks carry medication-calculation items in context, with rationales.