Dosage calculations worksheet with answers

Free printable Dosage 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
? × 25 mg

A patient is prescribed 12.5 mg of a drug. The tablets on the ward contain 25 mg each. How many tablets n do you give? The tablets are scored, so they can be broken in half.

12.5 mg25 mg/tablet
n = tablets
2.Easy
? × 500 mg

A patient is prescribed 1000 mg of a drug. The tablets on the ward contain 500 mg each. How many tablets n do you give?

1000 mg500 mg/tablet
n = tablets
3.Medium
62 kgBSA = 1.57 m²175 mg/m²D = ? mg

A patient weighing 62 kg has a body surface area of 1.57 m². The prescription is 175 mg/m². Find the dose D in mg.

62 kgBSA = 1.57 m²175 mg/m²
D = mg
4.Medium
1 g+ 4.2 mLV = ? mL

A vial contains 1 g of powder. The label says: add 4.2 mL of water for injection to give a total volume of 5 mL. The prescription is 400 mg. What volume V of the reconstituted solution do you give?

1 g+ 4.2 mL → 5 mL400 mg
V = mL
5.Hard
00.10.20.30.40.50.60.70.80.911 mL

The prescription is 2750 units of a drug that comes as 5000 units/mL. Draw up the dose in the 1 mL syringe: what volume V do you give?

2750 units5000 units/mL
V = mL
6.Hard
40 mg/1 mLV = ? mL

A patient weighs 50.6 lb. The prescription is 2 mg/kg as a single dose, and the stock contains 40 mg in 1 mL. Using 1 kg = 2.2 lb, what volume V do you give? Round to one decimal place.

50.6 lb2 mg/kg40 mg/1 mL1 kg = 2.2 lb
V = mL

Answer key

  1. 1. n = 0.5 tablets
  2. 2. n = 2 tablets
  3. 3. D = 274.8 mg
  4. 4. V = 2 mL
  5. 5. V = 0.55 mL
  6. 6. V = 1.2 mL

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