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
dextrose10% w/v250 mL? g

Practice exercise (made-up values, not clinical guidance). How many g of dextrose are in 250 mL of 10% w/v solution? Find m.

10% w/v250 mL
m = g
2.Easy
0123455 mL

A solution is 2% w/v. You need 76 mg of the drug. Draw up the volume in the syringe: what volume V is that?

2% w/v76 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 0.34 mg. Draw up the volume in the 1 mL syringe: what volume V is that?

1:10000.34 mg
V = mL
4.Medium
024681010 mL

A solution has a ratio strength of 1:10 000. You need 0.26 mg. Draw up the volume in the 10 mL syringe: what volume V is that?

1:10 0000.26 mg
V = mL
5.Hard
0123455 mL

A vial holds 500 mg of powder. You add 4.5 mL of diluent, and the powder adds 0.5 mL of volume. The prescription is 50 mg. Draw up the dose: what volume V do you give?

500 mg4.5 mL + 0.5 mL50 mg
V = mL
6.Hard
0123455 mL

A vial holds 500 mg of powder. You add 9.4 mL of diluent, and the powder adds 0.6 mL of volume. The prescription is 150 mg. Draw up the dose: what volume V do you give?

500 mg9.4 mL + 0.6 mL150 mg
V = mL

Answer key

  1. 1. m = 25 g
  2. 2. V = 3.8 mL
  3. 3. V = 0.34 mL
  4. 4. V = 2.6 mL
  5. 5. V = 0.5 mL
  6. 6. V = 3 mL

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