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 5% w/v. You need 165 mg of the drug. Draw up the volume in the syringe: what volume V is that?

5% w/v165 mg
V = mL
2.Easy
0123455 mL

A solution is 2% w/v. You need 96 mg of the drug. Draw up the volume in the syringe: what volume V is that?

2% w/v96 mg
V = mL
3.Medium
00.10.20.30.40.50.60.70.80.911 mL

A solution has a ratio strength of 1:1000. You need 0.87 mg. Draw up the volume in the 1 mL syringe: what volume V is that?

1:10000.87 mg
V = mL
4.Medium
024681010 mL

A solution has a ratio strength of 1:10 000. You need 0.38 mg. Draw up the volume in the 10 mL syringe: what volume V is that?

1:10 0000.38 mg
V = mL
5.Hard
50%dextrose? mL+10%dextrose20%300 mL

Practice exercise (made-up values, not clinical guidance). You must prepare 300 mL of 20% dextrose by mixing 50% and 10% dextrose. How many mL V of the 50% solution do you need? Round to the nearest whole mL.

50%10%20%300 mL
V = mL
6.Hard
0123455 mL

A vial holds 2000 mg of powder. You add 9.4 mL of diluent, and the powder adds 0.6 mL of volume. The prescription is 960 mg. Draw up the dose: what volume V do you give?

2000 mg9.4 mL + 0.6 mL960 mg
V = mL

Answer key

  1. 1. V = 3.3 mL
  2. 2. V = 4.8 mL
  3. 3. V = 0.87 mL
  4. 4. V = 3.8 mL
  5. 5. V = 75 mL
  6. 6. V = 4.8 mL

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