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 0.5% w/v. You need 7 mg of the drug. Draw up the volume in the syringe: what volume V is that?

0.5% w/v7 mg
V = mL
2.Easy
sodium bicarbonate8.4% w/v10 mL? g

Practice exercise (made-up values, not clinical guidance). How many g of sodium bicarbonate are in 10 mL of 8.4% w/v solution? Find m.

8.4% w/v10 mL
m = g
3.Medium
00.10.20.30.40.50.60.70.80.911 mL

A solution has a ratio strength of 1:1000. You need 0.59 mg. Draw up the volume in the 1 mL syringe: what volume V is that?

1:10000.59 mg
V = mL
4.Medium
ampicillin 1 gAdd 3.5 mL sterile water.Powder volume: 0.5 mL.750 mg → ? mL

Practice exercise (made-up values, not clinical guidance). A vial contains ampicillin 1000 mg as a powder. The practice label says to add 3.5 mL of sterile water; the powder adds 0.5 mL to the volume. The prescribed dose is 750 mg. What volume V do you draw up? Round to one decimal place.

1000 mg3.5 mL+0.5 mL750 mg
V = mL
5.Hard
0123455 mL

A vial holds 2000 mg of powder. You add 3.8 mL of diluent, and the powder adds 0.2 mL of volume. The prescription is 1050 mg. Draw up the dose: what volume V do you give?

2000 mg3.8 mL + 0.2 mL1050 mg
V = mL
6.Hard
0123455 mL

A vial holds 2000 mg of powder. You add 3.6 mL of diluent, and the powder adds 0.4 mL of volume. The prescription is 400 mg. Draw up the dose: what volume V do you give?

2000 mg3.6 mL + 0.4 mL400 mg
V = mL

Answer key

  1. 1. V = 1.4 mL
  2. 2. m = 0.84 g
  3. 3. V = 0.59 mL
  4. 4. V = 3 mL
  5. 5. V = 2.1 mL
  6. 6. V = 0.8 mL

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