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 1% w/v. You need 20 mg of the drug. Draw up the volume in the syringe: what volume V is that?

1% w/v20 mg

V = mL

2.Easy

A solution is 2% w/v. You need 90 mg of the drug. Draw up the volume in the syringe: what volume V is that?

2% w/v90 mg

V = mL

3.Medium

A solution has a ratio strength of 1:1000. You need 0.2 mg. Draw up the volume in the 1 mL syringe: what volume V is that?

1:10000.2 mg

V = mL

4.Medium

A solution has a ratio strength of 1:1000. You need 0.91 mg. Draw up the volume in the 1 mL syringe: what volume V is that?

1:10000.91 mg

V = mL

5.Hard

Practice exercise (made-up values, not clinical guidance). You must prepare 600 mL of 6% hydrogen peroxide from a 30% stock and purified water. How many mL V of water do you need? Round to the nearest whole mL.

30%0%6%600 mL

V = mL

6.Hard

A vial holds 2000 mg of powder. You add 9.2 mL of diluent, and the powder adds 0.8 mL of volume. The prescription is 440 mg. Draw up the dose: what volume V do you give?

2000 mg9.2 mL + 0.8 mL440 mg

V = mL

Answer key

1. V = 2 mL
2. V = 4.5 mL
3. V = 0.2 mL
4. V = 0.91 mL
5. V = 480 mL
6. V = 2.2 mL

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