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
? × 5 mg

A patient is prescribed 15 mg of a drug. The tablets on the ward contain 5 mg each. How many tablets n do you give?

15 mg5 mg/tablet
n = tablets
2.Easy
? × 25 mcg

The prescription is 0.05 mg of a drug. The tablets contain 25 micrograms (mcg) each. How many tablets n do you give?

0.05 mg25 mcg/tablet
n = tablets
3.Medium
024681010 mL

A child weighing 7 kg is prescribed 20 mg/kg of a drug. The stock solution contains 25 mg/mL. Draw up the dose: what volume V do you give?

7 kg20 mg/kg25 mg/mL
V = mL
4.Medium
2%w/vV = ? mL

A dose of 10 mg is needed from a 2% (w/v) solution. What volume V contains this dose?

10 mg2% w/v
V = mL
5.Hard
00.10.20.30.40.50.60.70.80.911 mL

The prescription is 1.64 mg. The ampoule contains 4000 micrograms per mL. Draw up the dose in the 1 mL syringe: what volume V do you give?

1.64 mg4000 mcg/mL
V = mL
6.Hard
25%stockV₁ = ? mL

You must prepare 250 mL of a 1% (w/v) solution from a 25% (w/v) stock solution. What volume of stock V₁ do you need?

C₁ = 25%C₂ = 1%V₂ = 250 mL
V₁ = mL

Answer key

  1. 1. n = 3 tablets
  2. 2. n = 2 tablets
  3. 3. V = 5.6 mL
  4. 4. V = 0.5 mL
  5. 5. V = 0.41 mL
  6. 6. V₁ = 10 mL

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