Pharmacy calculations worksheet with answers

A solution is 1% w/v. You need 32 mg of the drug. Draw up the volume in the syringe: what volume V is that?

Practice exercise (made-up values, not clinical guidance). How many g of sodium chloride are in 1000 mL of 0.9% w/v solution? Find m.

A solution has a ratio strength of 1:1000. You need 0.85 mg. Draw up the volume in the 1 mL syringe: what volume V is that?

Practice exercise (made-up values, not clinical guidance). A vial contains cefazolin 1000 mg as a powder. The practice label says to add 4.5 mL of sterile water; the powder adds 0.5 mL to the volume. The prescribed dose is 250 mg. What volume V do you draw up? Round to one decimal place.

Practice exercise (made-up values, not clinical guidance). You must prepare 450 mL of 30% dextrose by mixing 50% and 10% dextrose. How many mL V of the 10% solution do you need? Round to the nearest whole mL.

A vial holds 500 mg of powder. You add 2 mL of diluent, and the powder adds 0.5 mL of volume. The prescription is 240 mg. Draw up the dose: what volume V do you give?