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

0.5% w/v8 mg
V = mL
2.Easy
0123455 mL

A solution is 0.5% w/v. You need 21.5 mg of the drug. Draw up the volume in the syringe: what volume V is that?

0.5% w/v21.5 mg
V = mL
3.Medium
penicillin G 5 000 000 unitsdiluent addedconcentration18.2 mL250 000 units/mL8.2 mL500 000 units/mL3.2 mL1 000 000 units/mL400 000 units → ? mL

Practice exercise (made-up values, not clinical guidance). A vial of penicillin G contains 5 000 000 units. Its practice label gives three strengths (see the table). You add 8.2 mL of diluent. The prescribed dose is 400 000 units. What volume V do you draw up? Round to one decimal place.

8.2 mL → 500 000 units/mL400 000 units
V = mL
4.Medium
024681010 mL

A solution has a ratio strength of 1:10 000. You need 0.44 mg. Draw up the volume in the 10 mL syringe: what volume V is that?

1:10 0000.44 mg
V = mL
5.Hard
50%dextrose? mL+10%dextrose15%1000 mL

Practice exercise (made-up values, not clinical guidance). You must prepare 1000 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%1000 mL
V = mL
6.Hard
20%chlorhexidine+0%water? mL5%200 mL

Practice exercise (made-up values, not clinical guidance). You must prepare 200 mL of 5% chlorhexidine from a 20% stock and purified water. How many mL V of water do you need? Round to the nearest whole mL.

20%0%5%200 mL
V = mL

Answer key

  1. 1. V = 1.6 mL
  2. 2. V = 4.3 mL
  3. 3. V = 0.8 mL
  4. 4. V = 4.4 mL
  5. 5. V = 125 mL
  6. 6. V = 150 mL

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