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
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
glycerin125 g500 mL? % w/v

Practice exercise (made-up values, not clinical guidance). 125 g of glycerin is dissolved in water to a total volume of 500 mL. What is the percentage strength p (% w/v)?

125 g500 mL
p = %
3.Medium
00.10.20.30.40.50.60.70.80.911 mL

A solution has a ratio strength of 1:1000. You need 0.86 mg. Draw up the volume in the 1 mL syringe: what volume V is that?

1:10000.86 mg
V = mL
4.Medium
024681010 mL

A solution has a ratio strength of 1:10 000. You need 0.64 mg. Draw up the volume in the 10 mL syringe: what volume V is that?

1:10 0000.64 mg
V = mL
5.Hard
23%sodium chloride? mL+3%sodium chloride5%400 mL

Practice exercise (made-up values, not clinical guidance). You must prepare 400 mL of 5% sodium chloride by mixing 23% and 3% sodium chloride. How many mL V of the 23% solution do you need? Round to the nearest whole mL.

23%3%5%400 mL
V = mL
6.Hard
23%sodium chloride+3%sodium chloride? mL13%300 mL

Practice exercise (made-up values, not clinical guidance). You must prepare 300 mL of 13% sodium chloride by mixing 23% and 3% sodium chloride. How many mL V of the 3% solution do you need? Round to the nearest whole mL.

23%3%13%300 mL
V = mL

Answer key

  1. 1. m = 40 mg
  2. 2. p = 25 %
  3. 3. V = 0.86 mL
  4. 4. V = 6.4 mL
  5. 5. V = 40 mL
  6. 6. V = 150 mL

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