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.

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Name: ____________________   Date: ____________

1.Easy
dextrose500 g1000 mL? % w/v

Practice exercise (made-up values, not clinical guidance). 500 g of dextrose is dissolved in water to a total volume of 1000 mL. What is the percentage strength p (% w/v)?

500 g1000 mL
p = %
2.Easy
0123455 mL

A solution is 5% w/v. You need 60 mg of the drug. Draw up the volume in the syringe: what volume V is that?

5% w/v60 mg
V = mL
3.Medium
024681010 mL

A solution has a ratio strength of 1:10 000. You need 0.78 mg. Draw up the volume in the 10 mL syringe: what volume V is that?

1:10 0000.78 mg
V = mL
4.Medium
024681010 mL

A solution has a ratio strength of 1:10 000. You need 0.18 mg. Draw up the volume in the 10 mL syringe: what volume V is that?

1:10 0000.18 mg
V = mL
5.Hard
0123455 mL

A vial holds 250 mg of powder. You add 1.9 mL of diluent, and the powder adds 0.6 mL of volume. The prescription is 120 mg. Draw up the dose: what volume V do you give?

250 mg1.9 mL + 0.6 mL120 mg
V = mL
6.Hard
0123455 mL

A vial holds 250 mg of powder. You add 9.4 mL of diluent, and the powder adds 0.6 mL of volume. The prescription is 70 mg. Draw up the dose: what volume V do you give?

250 mg9.4 mL + 0.6 mL70 mg
V = mL

Answer key

  1. 1. p = 50 %
  2. 2. V = 1.2 mL
  3. 3. V = 7.8 mL
  4. 4. V = 1.8 mL
  5. 5. V = 1.2 mL
  6. 6. V = 2.8 mL

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