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
Solution1:400? % w/v

Practice exercise (made-up values, not clinical guidance). Express the ratio strength 1:400 as a percentage strength p (% w/v).

1:400
p = %
2.Easy
0123455 mL

A solution is 2% w/v. You need 26 mg of the drug. Draw up the volume in the syringe: what volume V is that?

2% w/v26 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 0.46 mg. Draw up the volume in the 10 mL syringe: what volume V is that?

1:10 0000.46 mg
V = mL
5.Hard
0123455 mL

A vial holds 2000 mg of powder. You add 4.6 mL of diluent, and the powder adds 0.4 mL of volume. The prescription is 960 mg. Draw up the dose: what volume V do you give?

2000 mg4.6 mL + 0.4 mL960 mg
V = mL
6.Hard
0123455 mL

A vial holds 1000 mg of powder. You add 9.2 mL of diluent, and the powder adds 0.8 mL of volume. The prescription is 260 mg. Draw up the dose: what volume V do you give?

1000 mg9.2 mL + 0.8 mL260 mg
V = mL

Answer key

  1. 1. p = 0.25 %
  2. 2. V = 1.3 mL
  3. 3. V = 7.8 mL
  4. 4. V = 4.6 mL
  5. 5. V = 2.4 mL
  6. 6. V = 2.6 mL

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