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
? × 20 mg

A patient is prescribed 60 mg of a drug. The tablets on the ward contain 20 mg each. How many tablets n do you give?

60 mg20 mg/tablet
n = tablets
2.Easy
0123455 mL

The prescription is 150 mg. The stock solution contains 250 mg in 5 mL. Draw up the dose in the syringe: what volume V do you give?

150 mg250 mg/5 mL
V = mL
3.Medium
12 kg2 mg/kgD = ? mg

A patient weighs 12 kg and is prescribed 2 mg/kg as a single dose. Find the dose D in mg.

12 kg2 mg/kg
D = mg
4.Medium
024681010 mL

A child weighing 30 kg is prescribed 2.5 mg/kg of a drug. The stock solution contains 25 mg/mL. Draw up the dose: what volume V do you give?

30 kg2.5 mg/kg25 mg/mL
V = mL
5.Hard
100 mg/5 mLV = ? mL

A child weighing 12 kg is prescribed 10 mg/kg per dose of an oral suspension that contains 100 mg in 5 mL. What volume V do you give?

12 kg10 mg/kg100 mg/5 mL
V = mL
6.Hard
20%stockV₁ = ? mL

You must prepare 100 mL of a 2% (w/v) solution from a 20% (w/v) stock solution. What volume of stock V₁ do you need?

C₁ = 20%C₂ = 2%V₂ = 100 mL
V₁ = mL

Answer key

  1. 1. n = 3 tablets
  2. 2. V = 3 mL
  3. 3. D = 24 mg
  4. 4. V = 3 mL
  5. 5. V = 6 mL
  6. 6. V₁ = 10 mL

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