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
? × 500 mg

A patient is prescribed 1500 mg of a drug. The tablets on the ward contain 500 mg each. How many tablets n do you give?

1500 mg500 mg/tablet
n = tablets
2.Easy
10 mg/1 mLV = ? mL

The prescription is 12 mg. The stock solution contains 10 mg in 1 mL. What volume V do you draw up?

12 mg10 mg/1 mL
V = mL
3.Medium
1%5 mLm = ? mg

How many milligrams of drug m are in 5 mL of a 1% (w/v) solution?

1% w/v5 mL
m = mg
4.Medium
1 g+ 4.2 mLV = ? mL

A vial contains 1 g of powder. The label says: add 4.2 mL of water for injection to give a total volume of 5 mL. The prescription is 120 mg. What volume V of the reconstituted solution do you give?

1 g+ 4.2 mL → 5 mL120 mg
V = mL
5.Hard
100 mg/5 mLV = ? mL

A child weighing 28 kg is prescribed 5 mg/kg per dose of an oral suspension that contains 100 mg in 5 mL. What volume V do you give?

28 kg5 mg/kg100 mg/5 mL
V = mL
6.Hard
50k units500 mL? mL/h1500 units/h

An infusion contains 50000 units of a drug in 500 mL. The prescription is 1500 units per hour. At what rate R do you set the pump, in mL/h?

50000 units/500 mL1500 units/h
R = mL/h

Answer key

  1. 1. n = 3 tablets
  2. 2. V = 1.2 mL
  3. 3. m = 50 mg
  4. 4. V = 0.6 mL
  5. 5. V = 7 mL
  6. 6. R = 15 mL/h

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