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
Solution1:200? % w/v

Practice exercise (made-up values, not clinical guidance). Express the ratio strength 1:200 as a percentage strength p (% w/v).

1:200
p = %
2.Easy
sodium chloride3% w/v500 mL? g

Practice exercise (made-up values, not clinical guidance). How many g of sodium chloride are in 500 mL of 3% w/v solution? Find m.

3% w/v500 mL
m = g
3.Medium
024681010 mL

A solution has a ratio strength of 1:10 000. You need 0.68 mg. Draw up the volume in the 10 mL syringe: what volume V is that?

1:10 0000.68 mg
V = mL
4.Medium
024681010 mL

A solution has a ratio strength of 1:10 000. You need 0.2 mg. Draw up the volume in the 10 mL syringe: what volume V is that?

1:10 0000.2 mg
V = mL
5.Hard
0123455 mL

A vial holds 500 mg of powder. You add 3.6 mL of diluent, and the powder adds 0.4 mL of volume. The prescription is 75 mg. Draw up the dose: what volume V do you give?

500 mg3.6 mL + 0.4 mL75 mg
V = mL
6.Hard
0123455 mL

A vial holds 250 mg of powder. You add 3.8 mL of diluent, and the powder adds 0.2 mL of volume. The prescription is 100 mg. Draw up the dose: what volume V do you give?

250 mg3.8 mL + 0.2 mL100 mg
V = mL

Answer key

  1. 1. p = 0.5 %
  2. 2. m = 15 g
  3. 3. V = 6.8 mL
  4. 4. V = 2 mL
  5. 5. V = 0.6 mL
  6. 6. V = 1.6 mL

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