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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1.Easy
epinephrine1:10 0001 mL? mg

Practice exercise (made-up values, not clinical guidance). A solution of epinephrine has a ratio strength of 1:10 000. How many milligrams m are in 1 mL?

1:10 0001 mL
m = mg
2.Easy
lidocaine1% w/v20 mL? mg

Practice exercise (made-up values, not clinical guidance). How many mg of lidocaine are in 20 mL of 1% w/v solution? Find m.

1% w/v20 mL
m = mg
3.Medium
00.10.20.30.40.50.60.70.80.911 mL

A solution has a ratio strength of 1:1000. You need 0.89 mg. Draw up the volume in the 1 mL syringe: what volume V is that?

1:10000.89 mg
V = mL
4.Medium
cefuroxime 750 mgAdd 7.2 mL sterile water.Powder volume: 0.3 mL.? mg/mL

Practice exercise (made-up values, not clinical guidance). A vial contains cefuroxime 750 mg as a powder. The practice label says to add 7.2 mL of sterile water; the powder adds 0.3 mL to the volume. What is the concentration C in mg/mL after reconstitution?

750 mg7.2 mL+0.3 mL
C = mg/mL
5.Hard
50%dextrose? mL+5%dextrose20%1500 mL

Practice exercise (made-up values, not clinical guidance). You must prepare 1500 mL of 20% dextrose by mixing 50% and 5% dextrose. How many mL V of the 50% solution do you need? Round to the nearest whole mL.

50%5%20%1500 mL
V = mL
6.Hard
70%dextrose+10%dextrose? mL40%300 mL

Practice exercise (made-up values, not clinical guidance). You must prepare 300 mL of 40% 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%40%300 mL
V = mL

Answer key

  1. 1. m = 0.1 mg
  2. 2. m = 200 mg
  3. 3. V = 0.89 mL
  4. 4. C = 100 mg/mL
  5. 5. V = 500 mL
  6. 6. V = 150 mL

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