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 0.5% w/v. You need 24 mg of the drug. Draw up the volume in the syringe: what volume V is that?

0.5% w/v24 mg

V = mL

2.Easy

A solution is 1% w/v. You need 8 mg of the drug. Draw up the volume in the syringe: what volume V is that?

1% w/v8 mg

V = mL

3.Medium

A solution has a ratio strength of 1:10 000. You need 0.4 mg. Draw up the volume in the 10 mL syringe: what volume V is that?

1:10 0000.4 mg

V = mL

4.Medium

A solution has a ratio strength of 1:1000. You need 0.37 mg. Draw up the volume in the 1 mL syringe: what volume V is that?

1:10000.37 mg

V = mL

5.Hard

Practice exercise (made-up values, not clinical guidance). You have 120 g of 5% coal tar ointment. How many grams m of 1% coal tar ointment must you add to make a 2% ointment? Round to the nearest whole gram.

120 g · 5%1%2%

m = g

6.Hard

A vial holds 500 mg of powder. You add 9.2 mL of diluent, and the powder adds 0.8 mL of volume. The prescription is 40 mg. Draw up the dose: what volume V do you give?

500 mg9.2 mL + 0.8 mL40 mg

V = mL

Answer key

1. V = 4.8 mL
2. V = 0.8 mL
3. V = 4 mL
4. V = 0.37 mL
5. m = 360 g
6. V = 0.8 mL

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