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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1.Easy
sodium chloride0.9% w/v500 mL? g

Practice exercise (made-up values, not clinical guidance). How many g of sodium chloride are in 500 mL of 0.9% w/v solution? Find m.

0.9% w/v500 mL
m = g
2.Easy
0123455 mL

A solution is 2% w/v. You need 90 mg of the drug. Draw up the volume in the syringe: what volume V is that?

2% w/v90 mg
V = mL
3.Medium
024681010 mL

A solution has a ratio strength of 1:10 000. You need 0.86 mg. Draw up the volume in the 10 mL syringe: what volume V is that?

1:10 0000.86 mg
V = mL
4.Medium
024681010 mL

A solution has a ratio strength of 1:10 000. You need 0.32 mg. Draw up the volume in the 10 mL syringe: what volume V is that?

1:10 0000.32 mg
V = mL
5.Hard
2.5%60 g+0.5%hydrocortisone? g1.5%hydrocortisone

Practice exercise (made-up values, not clinical guidance). You have 60 g of 2.5% hydrocortisone ointment. How many grams m of 0.5% hydrocortisone ointment must you add to make a 1.5% ointment? Round to the nearest whole gram.

60 g · 2.5%0.5%1.5%
m = g
6.Hard
0123455 mL

A vial holds 1000 mg of powder. You add 1.9 mL of diluent, and the powder adds 0.6 mL of volume. The prescription is 680 mg. Draw up the dose: what volume V do you give?

1000 mg1.9 mL + 0.6 mL680 mg
V = mL

Answer key

  1. 1. m = 4.5 g
  2. 2. V = 4.5 mL
  3. 3. V = 8.6 mL
  4. 4. V = 3.2 mL
  5. 5. m = 60 g
  6. 6. V = 1.7 mL

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