Drug calculation practice: 10 questions
Type your answer, then see every step. Made for UK student nurses working towards the 100% numeracy test, and for NMC CBT practice.
For education and exam practice only. The numbers are made up and no real medicines are used. This is not a substitute for the prescription, the BNF, local policy or a second check. You remain accountable for your own practice. Last reviewed October 2026.
How to get drug calculations right
- Make the units match first. Grams to milligrams, milligrams to micrograms: multiply by 1,000 each step down.
- Want ÷ got. What you want, divided by what you have got, times the volume it comes in.
- Ask if it looks sensible. Thirty tablets or 0.3 of a tablet should make you stop and check.
- Round only at the end, and only the way the question asks.
Want more than ten?
The Drug Calcs to 100% app has the full question bank, with tablets, liquids, injections, infusion rates and weight-based questions. A few questions are free, then it is £10 once, with no subscription.
These are practice for safeMedicate-style questions. This site is not connected to safeMedicate, your university or the NMC.