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

Practice exercise (made-up values, not clinical guidance). A solution of potassium permanganate has a ratio strength of 1:10 000. How many milligrams m are in 500 mL?

1:10 000500 mL

m = mg

2.Easy

A solution is 1% w/v. You need 38 mg of the drug. Draw up the volume in the syringe: what volume V is that?

1% w/v38 mg

V = mL

3.Medium

A solution has a ratio strength of 1:1000. You need 0.59 mg. Draw up the volume in the 1 mL syringe: what volume V is that?

1:10000.59 mg

V = mL

4.Medium

A solution has a ratio strength of 1:1000. You need 0.55 mg. Draw up the volume in the 1 mL syringe: what volume V is that?

1:10000.55 mg

V = mL

5.Hard

A vial holds 500 mg of powder. You add 3.2 mL of diluent, and the powder adds 0.8 mL of volume. The prescription is 225 mg. Draw up the dose: what volume V do you give?

500 mg3.2 mL + 0.8 mL225 mg

V = mL

6.Hard

A vial holds 2000 mg of powder. You add 3.8 mL of diluent, and the powder adds 0.2 mL of volume. The prescription is 1900 mg. Draw up the dose: what volume V do you give?

2000 mg3.8 mL + 0.2 mL1900 mg

V = mL

Answer key

1. m = 50 mg
2. V = 3.8 mL
3. V = 0.59 mL
4. V = 0.55 mL
5. V = 1.8 mL
6. V = 3.8 mL

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