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 2% w/v. You need 30 mg of the drug. Draw up the volume in the syringe: what volume V is that?

2% w/v30 mg
V = mL
2.Easy
0123455 mL

A solution is 2% w/v. You need 20 mg of the drug. Draw up the volume in the syringe: what volume V is that?

2% w/v20 mg
V = mL
3.Medium
cefazolin 1 gAdd 4.5 mL sterile water.Powder volume: 0.5 mL.? mg/mL

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
00.10.20.30.40.50.60.70.80.911 mL

A solution has a ratio strength of 1:1000. You need 0.51 mg. Draw up the volume in the 1 mL syringe: what volume V is that?

1:10000.51 mg
V = mL
5.Hard
0123455 mL

A vial holds 1000 mg of powder. You add 1.2 mL of diluent, and the powder adds 0.8 mL of volume. The prescription is 850 mg. Draw up the dose: what volume V do you give?

1000 mg1.2 mL + 0.8 mL850 mg
V = mL
6.Hard
0123455 mL

A vial holds 500 mg of powder. You add 4.2 mL of diluent, and the powder adds 0.8 mL of volume. The prescription is 120 mg. Draw up the dose: what volume V do you give?

500 mg4.2 mL + 0.8 mL120 mg
V = mL

Answer key

  1. 1. V = 1.5 mL
  2. 2. V = 1 mL
  3. 3. C = 200 mg/mL
  4. 4. V = 0.51 mL
  5. 5. V = 1.7 mL
  6. 6. V = 1.2 mL

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