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

A solution is 2% w/v. You need 88 mg of the drug. Draw up the volume in the syringe: what volume V is that?

2% w/v88 mg

V = mL

2.Easy

A solution is 1% w/v. You need 41 mg of the drug. Draw up the volume in the syringe: what volume V is that?

1% w/v41 mg

V = mL

3.Medium

A solution has a ratio strength of 1:1000. You need 0.47 mg. Draw up the volume in the 1 mL syringe: what volume V is that?

1:10000.47 mg

V = mL

4.Medium

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

5.Hard

Practice exercise (made-up values, not clinical guidance). You have 60 g of 5% coal tar ointment. How many grams m of 1% coal tar ointment must you add to make a 3% ointment? Round to the nearest whole gram.

60 g · 5%1%3%

m = g

6.Hard

A vial holds 250 mg of powder. You add 9.5 mL of diluent, and the powder adds 0.5 mL of volume. The prescription is 117.5 mg. Draw up the dose: what volume V do you give?

250 mg9.5 mL + 0.5 mL117.5 mg

V = mL

Answer key

1. V = 4.4 mL
2. V = 4.1 mL
3. V = 0.47 mL
4. V = 0.76 mL
5. m = 60 g
6. V = 4.7 mL

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