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 47 mg of the drug. Draw up the volume in the syringe: what volume V is that?

1% w/v47 mg

V = mL

2.Easy

Practice exercise (made-up values, not clinical guidance). How many g of sodium chloride are in 100 mL of 3% w/v solution? Find m.

3% w/v100 mL

m = g

3.Medium

A solution has a ratio strength of 1:1000. You need 0.41 mg. Draw up the volume in the 1 mL syringe: what volume V is that?

1:10000.41 mg

V = mL

4.Medium

A solution has a ratio strength of 1:1000. You need 0.95 mg. Draw up the volume in the 1 mL syringe: what volume V is that?

1:10000.95 mg

V = mL

5.Hard

A vial holds 500 mg of powder. You add 2.3 mL of diluent, and the powder adds 0.2 mL of volume. The prescription is 160 mg. Draw up the dose: what volume V do you give?

500 mg2.3 mL + 0.2 mL160 mg

V = mL

6.Hard

A vial holds 250 mg of powder. You add 4.2 mL of diluent, and the powder adds 0.8 mL of volume. The prescription is 105 mg. Draw up the dose: what volume V do you give?

250 mg4.2 mL + 0.8 mL105 mg

V = mL

Answer key

1. V = 4.7 mL
2. m = 3 g
3. V = 0.41 mL
4. V = 0.95 mL
5. V = 0.8 mL
6. V = 2.1 mL

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