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.

New worksheetPractise online with hints

For teachers: free to print, copy and use in class. Every new worksheet has new values and its own answer key. A link to ExamProblems on your course page is appreciated.

Name: ____________________   Date: ____________

1.Easy
dextrose10 g100 mL? % w/v

Practice exercise (made-up values, not clinical guidance). 10 g of dextrose is dissolved in water to a total volume of 100 mL. What is the percentage strength p (% w/v)?

10 g100 mL
p = %
2.Easy
0123455 mL

A solution is 0.5% w/v. You need 15 mg of the drug. Draw up the volume in the syringe: what volume V is that?

0.5% w/v15 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 0.76 mg. Draw up the volume in the 1 mL syringe: what volume V is that?

1:10000.76 mg
V = mL
4.Medium
024681010 mL

A solution has a ratio strength of 1:10 000. You need 0.88 mg. Draw up the volume in the 10 mL syringe: what volume V is that?

1:10 0000.88 mg
V = mL
5.Hard
2.5%120 g+0.5%hydrocortisone? g1.5%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 1.5% ointment? Round to the nearest whole gram.

120 g · 2.5%0.5%1.5%
m = g
6.Hard
10%150 g+2%salicylic acid? g6%salicylic acid

Practice exercise (made-up values, not clinical guidance). You have 150 g of 10% salicylic acid ointment. How many grams m of 2% salicylic acid ointment must you add to make a 6% ointment? Round to the nearest whole gram.

150 g · 10%2%6%
m = g

Answer key

  1. 1. p = 10 %
  2. 2. V = 3 mL
  3. 3. V = 0.76 mL
  4. 4. V = 8.8 mL
  5. 5. m = 120 g
  6. 6. m = 150 g

Full step-by-step solutions: practise this topic on examproblems.com.