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
potassium permanganate1:5 000500 mL? mg

Practice exercise (made-up values, not clinical guidance). A solution of potassium permanganate has a ratio strength of 1:5 000. How many milligrams m are in 500 mL?

1:5 000500 mL
m = mg
2.Easy
0123455 mL

A solution is 1% w/v. You need 33 mg of the drug. Draw up the volume in the syringe: what volume V is that?

1% w/v33 mg
V = mL
3.Medium
024681010 mL

A solution has a ratio strength of 1:10 000. You need 0.34 mg. Draw up the volume in the 10 mL syringe: what volume V is that?

1:10 0000.34 mg
V = mL
4.Medium
024681010 mL

A solution has a ratio strength of 1:10 000. You need 0.38 mg. Draw up the volume in the 10 mL syringe: what volume V is that?

1:10 0000.38 mg
V = mL
5.Hard
70%dextrose? mL+10%dextrose25%1000 mL

Practice exercise (made-up values, not clinical guidance). You must prepare 1000 mL of 25% dextrose by mixing 70% and 10% dextrose. How many mL V of the 70% solution do you need? Round to the nearest whole mL.

70%10%25%1000 mL
V = mL
6.Hard
0123455 mL

A vial holds 500 mg of powder. You add 4.5 mL of diluent, and the powder adds 0.5 mL of volume. The prescription is 350 mg. Draw up the dose: what volume V do you give?

500 mg4.5 mL + 0.5 mL350 mg
V = mL

Answer key

  1. 1. m = 100 mg
  2. 2. V = 3.3 mL
  3. 3. V = 3.4 mL
  4. 4. V = 3.8 mL
  5. 5. V = 250 mL
  6. 6. V = 3.5 mL

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