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
benzalkonium chloride1:2 00050 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 50 mL?

1:2 00050 mL
m = mg
2.Easy
0123455 mL

A solution is 5% w/v. You need 110 mg of the drug. Draw up the volume in the syringe: what volume V is that?

5% w/v110 mg
V = mL
3.Medium
00.10.20.30.40.50.60.70.80.911 mL

A solution has a ratio strength of 1:1000. You need 0.19 mg. Draw up the volume in the 1 mL syringe: what volume V is that?

1:10000.19 mg
V = mL
4.Medium
024681010 mL

A solution has a ratio strength of 1:10 000. You need 0.68 mg. Draw up the volume in the 10 mL syringe: what volume V is that?

1:10 0000.68 mg
V = mL
5.Hard
50%dextrose? mL+10%dextrose15%200 mL

Practice exercise (made-up values, not clinical guidance). You must prepare 200 mL of 15% dextrose by mixing 50% and 10% dextrose. How many mL V of the 50% solution do you need? Round to the nearest whole mL.

50%10%15%200 mL
V = mL
6.Hard
50%dextrose? mL+10%dextrose30%1000 mL

Practice exercise (made-up values, not clinical guidance). You must prepare 1000 mL of 30% dextrose by mixing 50% and 10% dextrose. How many mL V of the 50% solution do you need? Round to the nearest whole mL.

50%10%30%1000 mL
V = mL

Answer key

  1. 1. m = 25 mg
  2. 2. V = 2.2 mL
  3. 3. V = 0.19 mL
  4. 4. V = 6.8 mL
  5. 5. V = 25 mL
  6. 6. V = 500 mL

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