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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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
? × 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
3.Medium
10%5 mLm = ? mg

How many milligrams of drug m are in 5 mL of a 10% (w/v) solution?

10% w/v5 mL
m = mg
4.Medium
20%2 mLm = ? mg

How many milligrams of drug m are in 2 mL of a 20% (w/v) solution?

20% w/v2 mL
m = mg
5.Hard
40 mg/1 mLV = ? mL

A child weighing 20 kg is prescribed 12.5 mg/kg per dose of an oral suspension that contains 40 mg in 1 mL. What volume V do you give? Round to one decimal place.

20 kg12.5 mg/kg40 mg/1 mL
V = mL
6.Hard
50k units500 mL? mL/h1250 units/h

An infusion contains 50000 units of a drug in 500 mL. The prescription is 1250 units per hour. At what rate R do you set the pump, in mL/h?

50000 units/500 mL1250 units/h
R = mL/h

Answer key

  1. 1. n = 0.5 tablets
  2. 2. n = 3 tablets
  3. 3. m = 500 mg
  4. 4. m = 400 mg
  5. 5. V = 6.3 mL
  6. 6. R = 12.5 mL/h

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