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 5% w/v. You need 185 mg of the drug. Draw up the volume in the syringe: what volume V is that?

5% w/v185 mg

V = mL

2.Easy

A solution is 0.5% w/v. You need 11.5 mg of the drug. Draw up the volume in the syringe: what volume V is that?

0.5% w/v11.5 mg

V = mL

3.Medium

A solution has a ratio strength of 1:1000. You need 0.32 mg. Draw up the volume in the 1 mL syringe: what volume V is that?

1:10000.32 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 3.2 mL of diluent. The prescribed dose is 1 500 000 units. What volume V do you draw up? Round to one decimal place.

3.2 mL → 1 000 000 units/mL1 500 000 units

V = mL

5.Hard

A vial holds 500 mg of powder. You add 1.7 mL of diluent, and the powder adds 0.8 mL of volume. The prescription is 360 mg. Draw up the dose: what volume V do you give?

500 mg1.7 mL + 0.8 mL360 mg

V = mL

6.Hard

Practice exercise (made-up values, not clinical guidance). You have 200 g of 5% coal tar ointment. How many grams m of 1% coal tar ointment must you add to make a 3% ointment? Round to the nearest whole gram.

200 g · 5%1%3%

m = g

Answer key

1. V = 3.7 mL
2. V = 2.3 mL
3. V = 0.32 mL
4. V = 1.5 mL
5. V = 1.8 mL
6. m = 200 g

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