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 2% w/v. You need 82 mg of the drug. Draw up the volume in the syringe: what volume V is that?

2% w/v82 mg
V = mL
2.Easy
sodium bicarbonate8.4% w/v50 mL? g

Practice exercise (made-up values, not clinical guidance). How many g of sodium bicarbonate are in 50 mL of 8.4% w/v solution? Find m.

8.4% w/v50 mL
m = g
3.Medium
00.10.20.30.40.50.60.70.80.911 mL

A solution has a ratio strength of 1:1000. You need 0.9 mg. Draw up the volume in the 1 mL syringe: what volume V is that?

1:10000.9 mg
V = mL
4.Medium
024681010 mL

A solution has a ratio strength of 1:10 000. You need 0.68 mg. Draw up the volume in the 10 mL syringe: what volume V is that?

1:10 0000.68 mg
V = mL
5.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 740 mg. Draw up the dose: what volume V do you give?

2000 mg9.4 mL + 0.6 mL740 mg
V = mL
6.Hard
23%sodium chloride+3%sodium chloride? mL5%600 mL

Practice exercise (made-up values, not clinical guidance). You must prepare 600 mL of 5% sodium chloride by mixing 23% and 3% sodium chloride. How many mL V of the 3% solution do you need? Round to the nearest whole mL.

23%3%5%600 mL
V = mL

Answer key

  1. 1. V = 4.1 mL
  2. 2. m = 4.2 g
  3. 3. V = 0.9 mL
  4. 4. V = 6.8 mL
  5. 5. V = 3.7 mL
  6. 6. V = 540 mL

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