Pharmacy calculations worksheet with answers

Free printable Pharmacy 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
lidocaine2% w/v2 mL? mg

Practice exercise (made-up values, not clinical guidance). How many mg of lidocaine are in 2 mL of 2% w/v solution? Find m.

2% w/v2 mL
m = mg
2.Easy
0123455 mL

A solution is 0.5% w/v. You need 3 mg of the drug. Draw up the volume in the syringe: what volume V is that?

0.5% w/v3 mg
V = mL
3.Medium
penicillin G 5 000 000 unitsdiluent addedconcentration18.2 mL250 000 units/mL8.2 mL500 000 units/mL3.2 mL1 000 000 units/mL600 000 units → ? mL

Practice exercise (made-up values, not clinical guidance). A vial of penicillin G contains 5 000 000 units. Its practice label gives three strengths (see the table). You add 18.2 mL of diluent. The prescribed dose is 600 000 units. What volume V do you draw up? Round to one decimal place.

18.2 mL → 250 000 units/mL600 000 units
V = mL
4.Medium
penicillin G 5 000 000 unitsdiluent addedconcentration18.2 mL250 000 units/mL8.2 mL500 000 units/mL3.2 mL1 000 000 units/mL800 000 units → ? mL

Practice exercise (made-up values, not clinical guidance). A vial of penicillin G contains 5 000 000 units. Its practice label gives three strengths (see the table). You add 8.2 mL of diluent. The prescribed dose is 800 000 units. What volume V do you draw up? Round to one decimal place.

8.2 mL → 500 000 units/mL800 000 units
V = mL
5.Hard
70%dextrose+10%dextrose? mL25%1500 mL

Practice exercise (made-up values, not clinical guidance). You must prepare 1500 mL of 25% dextrose by mixing 70% and 10% dextrose. How many mL V of the 10% solution do you need? Round to the nearest whole mL.

70%10%25%1500 mL
V = mL
6.Hard
70%dextrose+10%dextrose? mL30%450 mL

Practice exercise (made-up values, not clinical guidance). You must prepare 450 mL of 30% dextrose by mixing 70% and 10% dextrose. How many mL V of the 10% solution do you need? Round to the nearest whole mL.

70%10%30%450 mL
V = mL

Answer key

  1. 1. m = 40 mg
  2. 2. V = 0.6 mL
  3. 3. V = 2.4 mL
  4. 4. V = 1.6 mL
  5. 5. V = 1125 mL
  6. 6. V = 300 mL

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