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 5% w/v. You need 205 mg of the drug. Draw up the volume in the syringe: what volume V is that?

5% w/v205 mg

V = mL

2.Easy

A solution is 5% w/v. You need 45 mg of the drug. Draw up the volume in the syringe: what volume V is that?

5% w/v45 mg

V = mL

3.Medium

A solution has a ratio strength of 1:1000. You need 0.77 mg. Draw up the volume in the 1 mL syringe: what volume V is that?

1:10000.77 mg

V = mL

4.Medium

A solution has a ratio strength of 1:1000. You need 0.56 mg. Draw up the volume in the 1 mL syringe: what volume V is that?

1:10000.56 mg

V = mL

5.Hard

Practice exercise (made-up values, not clinical guidance). You have 20 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.

20 g · 10%2%6%

m = g

6.Hard

A vial holds 2000 mg of powder. You add 9.5 mL of diluent, and the powder adds 0.5 mL of volume. The prescription is 440 mg. Draw up the dose: what volume V do you give?

2000 mg9.5 mL + 0.5 mL440 mg

V = mL

Answer key

1. V = 4.1 mL
2. V = 0.9 mL
3. V = 0.77 mL
4. V = 0.56 mL
5. m = 20 g
6. V = 2.2 mL

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