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). How many g of dextrose are in 20 mL of 50% w/v solution? Find m.

50% w/v20 mL

m = g

2.Easy

A solution is 1% w/v. You need 34 mg of the drug. Draw up the volume in the syringe: what volume V is that?

1% w/v34 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 0.56 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 must prepare 1000 mL of 13% sodium chloride by mixing 23% and 3% sodium chloride. How many mL V of the 3% solution do you need? Round to the nearest whole mL.

23%3%13%1000 mL

V = mL

6.Hard

A vial holds 250 mg of powder. You add 4.4 mL of diluent, and the powder adds 0.6 mL of volume. The prescription is 115 mg. Draw up the dose: what volume V do you give?

250 mg4.4 mL + 0.6 mL115 mg

V = mL

Answer key

1. m = 10 g
2. V = 3.4 mL
3. V = 0.59 mL
4. V = 0.56 mL
5. V = 500 mL
6. V = 2.3 mL

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