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
Solution1:10 000? % w/v

Practice exercise (made-up values, not clinical guidance). Express the ratio strength 1:10 000 as a percentage strength p (% w/v).

1:10 000
p = %
2.Easy
0123455 mL

A solution is 5% w/v. You need 245 mg of the drug. Draw up the volume in the syringe: what volume V is that?

5% w/v245 mg
V = mL
3.Medium
024681010 mL

A solution has a ratio strength of 1:10 000. You need 0.28 mg. Draw up the volume in the 10 mL syringe: what volume V is that?

1:10 0000.28 mg
V = mL
4.Medium
024681010 mL

A solution has a ratio strength of 1:10 000. You need 0.48 mg. Draw up the volume in the 10 mL syringe: what volume V is that?

1:10 0000.48 mg
V = mL
5.Hard
2.5%150 g+0.5%hydrocortisone? g2%hydrocortisone

Practice exercise (made-up values, not clinical guidance). You have 150 g of 2.5% hydrocortisone ointment. How many grams m of 0.5% hydrocortisone ointment must you add to make a 2% ointment? Round to the nearest whole gram.

150 g · 2.5%0.5%2%
m = g
6.Hard
2.5%120 g+0.5%hydrocortisone? g1%hydrocortisone

Practice exercise (made-up values, not clinical guidance). You have 120 g of 2.5% hydrocortisone ointment. How many grams m of 0.5% hydrocortisone ointment must you add to make a 1% ointment? Round to the nearest whole gram.

120 g · 2.5%0.5%1%
m = g

Answer key

  1. 1. p = 0.01 %
  2. 2. V = 4.9 mL
  3. 3. V = 2.8 mL
  4. 4. V = 4.8 mL
  5. 5. m = 50 g
  6. 6. m = 360 g

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