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
? × 12.5 mg

A patient is prescribed 6.25 mg of a drug. The tablets on the ward contain 12.5 mg each. How many tablets n do you give? The tablets are scored, so they can be broken in half.

6.25 mg12.5 mg/tablet
n = tablets
2.Easy
125 mg/5 mLV = ? mL

The prescription is 62.5 mg. The stock solution contains 125 mg in 5 mL. What volume V do you draw up?

62.5 mg125 mg/5 mL
V = mL
3.Medium
2%2 mLm = ? mg

How many milligrams of drug m are in 2 mL of a 2% (w/v) solution?

2% w/v2 mL
m = mg
4.Medium
36 kgBSA = 1.14 m²375 mg/m²D = ? mg

A patient weighing 36 kg has a body surface area of 1.14 m². The prescription is 375 mg/m². Find the dose D in mg.

36 kgBSA = 1.14 m²375 mg/m²
D = mg
5.Hard
60 kg141 cmBSA = √(h·w/3600)25 mg/m²D = ? mg

A patient is 141 cm tall and weighs 60 kg. The prescription is 25 mg/m². Using the Mosteller formula BSA = √(height (cm) × weight (kg)/3600), find the dose D in mg.

141 cm60 kg25 mg/m²
D = mg
6.Hard
50%stockwater = ? mL

You must prepare 200 mL of a 1% (w/v) solution from a 50% (w/v) stock solution. How much water W must be added to the stock?

C₁ = 50%C₂ = 1%V₂ = 200 mL
W = mL

Answer key

  1. 1. n = 0.5 tablets
  2. 2. V = 2.5 mL
  3. 3. m = 40 mg
  4. 4. D = 427.5 mg
  5. 5. D = 38.32 mg
  6. 6. W = 196 mL

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