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 2% w/v. You need 54 mg of the drug. Draw up the volume in the syringe: what volume V is that?

2% w/v54 mg
V = mL
2.Easy
sodium chloride0.9% w/v100 mL? g

Practice exercise (made-up values, not clinical guidance). How many g of sodium chloride are in 100 mL of 0.9% w/v solution? Find m.

0.9% w/v100 mL
m = g
3.Medium
024681010 mL

A solution has a ratio strength of 1:10 000. You need 0.48 mg. Draw up the volume in the 10 mL syringe: what volume V is that?

1:10 0000.48 mg
V = mL
4.Medium
penicillin G 5 000 000 unitsdiluent addedconcentration18.2 mL250 000 units/mL8.2 mL500 000 units/mL3.2 mL1 000 000 units/mL2 400 000 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 2 400 000 units. What volume V do you draw up? Round to one decimal place.

8.2 mL → 500 000 units/mL2 400 000 units
V = mL
5.Hard
70%dextrose? mL+10%dextrose20%300 mL

Practice exercise (made-up values, not clinical guidance). You must prepare 300 mL of 20% 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%20%300 mL
V = mL
6.Hard
0123455 mL

A vial holds 500 mg of powder. You add 3.2 mL of diluent, and the powder adds 0.8 mL of volume. The prescription is 400 mg. Draw up the dose: what volume V do you give?

500 mg3.2 mL + 0.8 mL400 mg
V = mL

Answer key

  1. 1. V = 2.7 mL
  2. 2. m = 0.9 g
  3. 3. V = 4.8 mL
  4. 4. V = 4.8 mL
  5. 5. V = 50 mL
  6. 6. V = 3.2 mL

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