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 1% w/v. You need 35 mg of the drug. Draw up the volume in the syringe: what volume V is that?

1% w/v35 mg

V = mL

2.Easy

A solution is 5% w/v. You need 95 mg of the drug. Draw up the volume in the syringe: what volume V is that?

5% w/v95 mg

V = mL

3.Medium

A solution has a ratio strength of 1:10 000. You need 0.32 mg. Draw up the volume in the 10 mL syringe: what volume V is that?

1:10 0000.32 mg

V = 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 18.2 mL of diluent. The prescribed dose is 750 000 units. What volume V do you draw up? Round to one decimal place.

18.2 mL → 250 000 units/mL750 000 units

V = mL

5.Hard

A vial holds 2000 mg of powder. You add 9.6 mL of diluent, and the powder adds 0.4 mL of volume. The prescription is 260 mg. Draw up the dose: what volume V do you give?

2000 mg9.6 mL + 0.4 mL260 mg

V = mL

6.Hard

Practice exercise (made-up values, not clinical guidance). You must prepare 750 mL of 40% dextrose by mixing 70% and 10% dextrose. How many mL V of the 10% solution do you need? Round to the nearest whole mL.

70%10%40%750 mL

V = mL

Answer key

1. V = 3.5 mL
2. V = 1.9 mL
3. V = 3.2 mL
4. V = 3 mL
5. V = 1.3 mL
6. V = 375 mL

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