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

1% w/v29 mg

V = mL

2.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

3.Medium

Practice exercise (made-up values, not clinical guidance). A vial of penicillin G contains 5 000 000 units. Its practice label gives three strengths (see the table). You add 18.2 mL of diluent. The prescribed dose is 1 500 000 units. What volume V do you draw up? Round to one decimal place.

18.2 mL → 250 000 units/mL1 500 000 units

V = mL

4.Medium

A solution has a ratio strength of 1:10 000. You need 0.18 mg. Draw up the volume in the 10 mL syringe: what volume V is that?

1:10 0000.18 mg

V = mL

5.Hard

Practice exercise (made-up values, not clinical guidance). You must prepare 600 mL of 20% dextrose by mixing 50% and 5% dextrose. How many mL V of the 5% solution do you need? Round to the nearest whole mL.

50%5%20%600 mL

V = mL

6.Hard

Practice exercise (made-up values, not clinical guidance). You must prepare 100 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%100 mL

V = mL

Answer key

1. V = 2.9 mL
2. m = 10 g
3. V = 6 mL
4. V = 1.8 mL
5. V = 400 mL
6. V = 80 mL

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