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
dextrose50 g500 mL? % w/v

Practice exercise (made-up values, not clinical guidance). 50 g of dextrose is dissolved in water to a total volume of 500 mL. What is the percentage strength p (% w/v)?

50 g500 mL
p = %
2.Easy
dextrose50 g100 mL? % w/v

Practice exercise (made-up values, not clinical guidance). 50 g of dextrose is dissolved in water to a total volume of 100 mL. What is the percentage strength p (% w/v)?

50 g100 mL
p = %
3.Medium
ceftriaxone 1 gAdd 9.6 mL sterile water.Powder volume: 0.4 mL.800 mg → ? mL

Practice exercise (made-up values, not clinical guidance). A vial contains ceftriaxone 1000 mg as a powder. The practice label says to add 9.6 mL of sterile water; the powder adds 0.4 mL to the volume. The prescribed dose is 800 mg. What volume V do you draw up? Round to one decimal place.

1000 mg9.6 mL+0.4 mL800 mg
V = mL
4.Medium
024681010 mL

A solution has a ratio strength of 1:10 000. You need 0.3 mg. Draw up the volume in the 10 mL syringe: what volume V is that?

1:10 0000.3 mg
V = mL
5.Hard
0123455 mL

A vial holds 2000 mg of powder. You add 1.8 mL of diluent, and the powder adds 0.2 mL of volume. The prescription is 1200 mg. Draw up the dose: what volume V do you give?

2000 mg1.8 mL + 0.2 mL1200 mg
V = mL
6.Hard
0123455 mL

A vial holds 1000 mg of powder. You add 4.5 mL of diluent, and the powder adds 0.5 mL of volume. The prescription is 260 mg. Draw up the dose: what volume V do you give?

1000 mg4.5 mL + 0.5 mL260 mg
V = mL

Answer key

  1. 1. p = 10 %
  2. 2. p = 50 %
  3. 3. V = 8 mL
  4. 4. V = 3 mL
  5. 5. V = 1.2 mL
  6. 6. V = 1.3 mL

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