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 170 mg of the drug. Draw up the volume in the syringe: what volume V is that?

5% w/v170 mg
V = mL
2.Easy
epinephrine1:1 0000.5 mL? mg

Practice exercise (made-up values, not clinical guidance). A solution of epinephrine has a ratio strength of 1:1 000. How many milligrams m are in 0.5 mL?

1:1 0000.5 mL
m = mg
3.Medium
024681010 mL

A solution has a ratio strength of 1:10 000. You need 0.44 mg. Draw up the volume in the 10 mL syringe: what volume V is that?

1:10 0000.44 mg
V = mL
4.Medium
024681010 mL

A solution has a ratio strength of 1:10 000. You need 0.58 mg. Draw up the volume in the 10 mL syringe: what volume V is that?

1:10 0000.58 mg
V = mL
5.Hard
0123455 mL

A vial holds 1000 mg of powder. You add 4.8 mL of diluent, and the powder adds 0.2 mL of volume. The prescription is 580 mg. Draw up the dose: what volume V do you give?

1000 mg4.8 mL + 0.2 mL580 mg
V = mL
6.Hard
30%hydrogen peroxide+0%water? mL3%100 mL

Practice exercise (made-up values, not clinical guidance). You must prepare 100 mL of 3% hydrogen peroxide from a 30% stock and purified water. How many mL V of water do you need? Round to the nearest whole mL.

30%0%3%100 mL
V = mL

Answer key

  1. 1. V = 3.4 mL
  2. 2. m = 0.5 mg
  3. 3. V = 4.4 mL
  4. 4. V = 5.8 mL
  5. 5. V = 2.9 mL
  6. 6. V = 90 mL

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