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
0123455 mL

A solution is 1% w/v. You need 37 mg of the drug. Draw up the volume in the syringe: what volume V is that?

1% w/v37 mg
V = mL
2.Easy
0123455 mL

A solution is 0.5% w/v. You need 4 mg of the drug. Draw up the volume in the syringe: what volume V is that?

0.5% w/v4 mg
V = mL
3.Medium
cefuroxime 750 mgAdd 7.2 mL sterile water.Powder volume: 0.3 mL.300 mg → ? mL

Practice exercise (made-up values, not clinical guidance). A vial contains cefuroxime 750 mg as a powder. The practice label says to add 7.2 mL of sterile water; the powder adds 0.3 mL to the volume. The prescribed dose is 300 mg. What volume V do you draw up? Round to one decimal place.

750 mg7.2 mL+0.3 mL300 mg
V = mL
4.Medium
00.10.20.30.40.50.60.70.80.911 mL

A solution has a ratio strength of 1:1000. You need 0.36 mg. Draw up the volume in the 1 mL syringe: what volume V is that?

1:10000.36 mg
V = mL
5.Hard
0123455 mL

A vial holds 2000 mg of powder. You add 9.6 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 mg9.6 mL + 0.4 mL960 mg
V = mL
6.Hard
0123455 mL

A vial holds 500 mg of powder. You add 1.4 mL of diluent, and the powder adds 0.6 mL of volume. The prescription is 450 mg. Draw up the dose: what volume V do you give?

500 mg1.4 mL + 0.6 mL450 mg
V = mL

Answer key

  1. 1. V = 3.7 mL
  2. 2. V = 0.8 mL
  3. 3. V = 3 mL
  4. 4. V = 0.36 mL
  5. 5. V = 4.8 mL
  6. 6. V = 1.8 mL

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