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
sodium bicarbonate8.4% w/v10 mL? g

Practice exercise (made-up values, not clinical guidance). How many g of sodium bicarbonate are in 10 mL of 8.4% w/v solution? Find m.

8.4% w/v10 mL
m = g
2.Easy
0123455 mL

A solution is 2% w/v. You need 24 mg of the drug. Draw up the volume in the syringe: what volume V is that?

2% w/v24 mg
V = mL
3.Medium
024681010 mL

A solution has a ratio strength of 1:10 000. You need 0.14 mg. Draw up the volume in the 10 mL syringe: what volume V is that?

1:10 0000.14 mg
V = mL
4.Medium
oxacillin 2 gAdd 11.5 mL sterile water.Powder volume: 1 mL.600 mg → ? mL

Practice exercise (made-up values, not clinical guidance). A vial contains oxacillin 2000 mg as a powder. The practice label says to add 11.5 mL of sterile water; the powder adds 1 mL to the volume. The prescribed dose is 600 mg. What volume V do you draw up? Round to one decimal place.

2000 mg11.5 mL+1 mL600 mg
V = mL
5.Hard
23%sodium chloride? mL+3%sodium chloride5%450 mL

Practice exercise (made-up values, not clinical guidance). You must prepare 450 mL of 5% sodium chloride by mixing 23% and 3% sodium chloride. How many mL V of the 23% solution do you need? Round to the nearest whole mL.

23%3%5%450 mL
V = mL
6.Hard
0123455 mL

A vial holds 2000 mg of powder. You add 3.8 mL of diluent, and the powder adds 0.2 mL of volume. The prescription is 1350 mg. Draw up the dose: what volume V do you give?

2000 mg3.8 mL + 0.2 mL1350 mg
V = mL

Answer key

  1. 1. m = 0.84 g
  2. 2. V = 1.2 mL
  3. 3. V = 1.4 mL
  4. 4. V = 3.8 mL
  5. 5. V = 45 mL
  6. 6. V = 2.7 mL

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