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 20 mg of the drug. Draw up the volume in the syringe: what volume V is that?

1% w/v20 mg
V = mL
2.Easy
sodium bicarbonate8.4% w/v50 mL? g

Practice exercise (made-up values, not clinical guidance). How many g of sodium bicarbonate are in 50 mL of 8.4% w/v solution? Find m.

8.4% w/v50 mL
m = g
3.Medium
024681010 mL

A solution has a ratio strength of 1:10 000. You need 0.12 mg. Draw up the volume in the 10 mL syringe: what volume V is that?

1:10 0000.12 mg
V = 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 0.72 mg. Draw up the volume in the 1 mL syringe: what volume V is that?

1:10000.72 mg
V = mL
5.Hard
70%dextrose+10%dextrose? mL25%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 10% solution do you need? Round to the nearest whole mL.

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

A vial holds 250 mg of powder. You add 4.5 mL of diluent, and the powder adds 0.5 mL of volume. The prescription is 125 mg. Draw up the dose: what volume V do you give?

250 mg4.5 mL + 0.5 mL125 mg
V = mL

Answer key

  1. 1. V = 2 mL
  2. 2. m = 4.2 g
  3. 3. V = 1.2 mL
  4. 4. V = 0.72 mL
  5. 5. V = 750 mL
  6. 6. V = 2.5 mL

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