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 0.5% w/v. You need 4.5 mg of the drug. Draw up the volume in the syringe: what volume V is that?

0.5% w/v4.5 mg
V = mL
2.Easy
0123455 mL

A solution is 1% w/v. You need 20 mg of the drug. Draw up the volume in the syringe: what volume V is that?

1% w/v20 mg
V = mL
3.Medium
024681010 mL

A solution has a ratio strength of 1:10 000. You need 0.42 mg. Draw up the volume in the 10 mL syringe: what volume V is that?

1:10 0000.42 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 0.94 mg. Draw up the volume in the 1 mL syringe: what volume V is that?

1:10000.94 mg
V = mL
5.Hard
70%dextrose? mL+10%dextrose20%600 mL

Practice exercise (made-up values, not clinical guidance). You must prepare 600 mL of 20% dextrose by mixing 70% and 10% dextrose. How many mL V of the 70% solution do you need? Round to the nearest whole mL.

70%10%20%600 mL
V = mL
6.Hard
0123455 mL

A vial holds 250 mg of powder. You add 9.5 mL of diluent, and the powder adds 0.5 mL of volume. The prescription is 50 mg. Draw up the dose: what volume V do you give?

250 mg9.5 mL + 0.5 mL50 mg
V = mL

Answer key

  1. 1. V = 0.9 mL
  2. 2. V = 2 mL
  3. 3. V = 4.2 mL
  4. 4. V = 0.94 mL
  5. 5. V = 100 mL
  6. 6. V = 2 mL

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