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 0.5% w/v. You need 12 mg of the drug. Draw up the volume in the syringe: what volume V is that?

0.5% w/v12 mg
V = mL
2.Easy
bupivacaine0.5% w/v30 mL? mg

Practice exercise (made-up values, not clinical guidance). How many mg of bupivacaine are in 30 mL of 0.5% w/v solution? Find m.

0.5% w/v30 mL
m = mg
3.Medium
024681010 mL

A solution has a ratio strength of 1:10 000. You need 0.56 mg. Draw up the volume in the 10 mL syringe: what volume V is that?

1:10 0000.56 mg
V = mL
4.Medium
024681010 mL

A solution has a ratio strength of 1:10 000. You need 0.7 mg. Draw up the volume in the 10 mL syringe: what volume V is that?

1:10 0000.7 mg
V = mL
5.Hard
0123455 mL

A vial holds 2000 mg of powder. You add 9.2 mL of diluent, and the powder adds 0.8 mL of volume. The prescription is 900 mg. Draw up the dose: what volume V do you give?

2000 mg9.2 mL + 0.8 mL900 mg
V = mL
6.Hard
50%dextrose? mL+10%dextrose30%200 mL

Practice exercise (made-up values, not clinical guidance). You must prepare 200 mL of 30% dextrose by mixing 50% and 10% dextrose. How many mL V of the 50% solution do you need? Round to the nearest whole mL.

50%10%30%200 mL
V = mL

Answer key

  1. 1. V = 2.4 mL
  2. 2. m = 150 mg
  3. 3. V = 5.6 mL
  4. 4. V = 7 mL
  5. 5. V = 4.5 mL
  6. 6. V = 100 mL

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