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
? × 250 mg

A patient is prescribed 250 mg of a drug 3 times a day for 7 days. The tablets contain 250 mg each. How many tablets N are needed for the whole course?

250 mg3× per day7 days250 mg/tablet
N = tablets
2.Easy
? × 1 mg

The prescription is 3000 micrograms (mcg) of a drug. The tablets contain 1 mg each. How many tablets n do you give?

3000 mcg1 mg/tablet
n = tablets
3.Medium
024681010 mL

A child weighing 36 kg is prescribed 4 mg/kg of a drug. The stock solution contains 20 mg/mL. Draw up the dose: what volume V do you give?

36 kg4 mg/kg20 mg/mL
V = mL
4.Medium
024681010 mL

A child weighing 29 kg is prescribed 2 mg/kg of a drug. The stock solution contains 10 mg/mL. Draw up the dose: what volume V do you give?

29 kg2 mg/kg10 mg/mL
V = mL
5.Hard
28 kg116 cmBSA = √(h·w/3600)25 mg/m²D = ? mg

A patient is 116 cm tall and weighs 28 kg. The prescription is 25 mg/m². Using the Mosteller formula BSA = √(height (cm) × weight (kg)/3600), find the dose D in mg.

116 cm28 kg25 mg/m²
D = mg
6.Hard
20%stockwater = ? mL

You must prepare 500 mL of a 0.5% (w/v) solution from a 20% (w/v) stock solution. How much water W must be added to the stock?

C₁ = 20%C₂ = 0.5%V₂ = 500 mL
W = mL

Answer key

  1. 1. N = 21 tablets
  2. 2. n = 3 tablets
  3. 3. V = 7.2 mL
  4. 4. V = 5.8 mL
  5. 5. D = 23.75 mg
  6. 6. W = 487.5 mL

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