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 worksheetPractise 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
0123455 mL

A solution is 1% w/v. You need 34 mg of the drug. Draw up the volume in the syringe: what volume V is that?

1% w/v34 mg
V = mL
2.Easy
benzalkonium chloride1:2 000200 mL? mg

Practice exercise (made-up values, not clinical guidance). A solution of benzalkonium chloride has a ratio strength of 1:2 000. How many milligrams m are in 200 mL?

1:2 000200 mL
m = mg
3.Medium
024681010 mL

A solution has a ratio strength of 1:10 000. You need 0.84 mg. Draw up the volume in the 10 mL syringe: what volume V is that?

1:10 0000.84 mg
V = mL
4.Medium
024681010 mL

A solution has a ratio strength of 1:10 000. You need 0.56 mg. Draw up the volume in the 10 mL syringe: what volume V is that?

1:10 0000.56 mg
V = mL
5.Hard
5%50 g+1%coal tar? g2%coal tar

Practice exercise (made-up values, not clinical guidance). You have 50 g of 5% coal tar ointment. How many grams m of 1% coal tar ointment must you add to make a 2% ointment? Round to the nearest whole gram.

50 g · 5%1%2%
m = g
6.Hard
0123455 mL

A vial holds 1000 mg of powder. You add 9.4 mL of diluent, and the powder adds 0.6 mL of volume. The prescription is 90 mg. Draw up the dose: what volume V do you give?

1000 mg9.4 mL + 0.6 mL90 mg
V = mL

Answer key

  1. 1. V = 3.4 mL
  2. 2. m = 100 mg
  3. 3. V = 8.4 mL
  4. 4. V = 5.6 mL
  5. 5. m = 150 g
  6. 6. V = 0.9 mL

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