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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1.Easy
sodium chloride0.9% w/v1000 mL? g

Practice exercise (made-up values, not clinical guidance). How many g of sodium chloride are in 1000 mL of 0.9% w/v solution? Find m.

0.9% w/v1000 mL
m = g
2.Easy
benzalkonium chloride1:2 00050 mL? mg

Practice exercise (made-up values, not clinical guidance). A solution of benzalkonium chloride has a ratio strength of 1:2 000. How many milligrams m are in 50 mL?

1:2 00050 mL
m = mg
3.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
4.Medium
00.10.20.30.40.50.60.70.80.911 mL

A solution has a ratio strength of 1:1000. You need 0.51 mg. Draw up the volume in the 1 mL syringe: what volume V is that?

1:10000.51 mg
V = mL
5.Hard
30%hydrogen peroxide+0%water? mL10%300 mL

Practice exercise (made-up values, not clinical guidance). You must prepare 300 mL of 10% hydrogen peroxide from a 30% stock and purified water. How many mL V of water do you need? Round to the nearest whole mL.

30%0%10%300 mL
V = mL
6.Hard
0123455 mL

A vial holds 500 mg of powder. You add 3.5 mL of diluent, and the powder adds 0.5 mL of volume. The prescription is 275 mg. Draw up the dose: what volume V do you give?

500 mg3.5 mL + 0.5 mL275 mg
V = mL

Answer key

  1. 1. m = 9 g
  2. 2. m = 25 mg
  3. 3. V = 6.8 mL
  4. 4. V = 0.51 mL
  5. 5. V = 200 mL
  6. 6. V = 2.2 mL

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