Pharmacy calculations worksheet with answers

Free printable Pharmacy calculations worksheet: 6 problems from easy to exam level, with an answer key. Print it or save it as a PDF.

New worksheet Practise online with hints

For teachers: free to print, copy and use in class. Every new worksheet has new values and its own answer key. A link to ExamProblems on your course page is appreciated.

Name: ____________________ Date: ____________

1.Easy

A solution is 2% w/v. You need 72 mg of the drug. Draw up the volume in the syringe: what volume V is that?

2% w/v72 mg

V = mL

2.Easy

A solution is 2% w/v. You need 84 mg of the drug. Draw up the volume in the syringe: what volume V is that?

2% w/v84 mg

V = mL

3.Medium

Practice exercise (made-up values, not clinical guidance). A vial contains cefazolin 1000 mg as a powder. The practice label says to add 4.5 mL of sterile water; the powder adds 0.5 mL to the volume. What is the concentration C in mg/mL after reconstitution?

1000 mg4.5 mL+0.5 mL

C = mg/mL

4.Medium

Practice exercise (made-up values, not clinical guidance). A vial of penicillin G contains 5 000 000 units. Its practice label gives three strengths (see the table). You add 3.2 mL of diluent. The prescribed dose is 750 000 units. What volume V do you draw up? Round to one decimal place.

3.2 mL → 1 000 000 units/mL750 000 units

V = mL

5.Hard

Practice exercise (made-up values, not clinical guidance). You must prepare 600 mL of 40% dextrose by mixing 70% and 10% dextrose. How many mL V of the 70% solution do you need? Round to the nearest whole mL.

70%10%40%600 mL

V = mL

6.Hard

A vial holds 1000 mg of powder. You add 9.5 mL of diluent, and the powder adds 0.5 mL of volume. The prescription is 110 mg. Draw up the dose: what volume V do you give?

1000 mg9.5 mL + 0.5 mL110 mg

V = mL

Answer key

1. V = 3.6 mL
2. V = 4.2 mL
3. C = 200 mg/mL
4. V = 0.8 mL
5. V = 300 mL
6. V = 1.1 mL

Full step-by-step solutions: practise this topic on examproblems.com.