Examples · Weight-based dose (mg/kg)
Worked example
Weight-based dose (mg/kg) — practice problem 13
A patient weighs 44 lb. The prescriber orders cefazolin 5 mg/kg/dose.
Weight44 lb
Ordered5 mg/kg/dose
How many mg is the dose?
Answer: 100 mg
Step-by-step solution
1. Convert the patient's weight to kilograms
44 lb × ( 1 kg ÷ 2.2 lb )
= 20 kg
2. Multiply weight by the ordered mg/kg
20 kg × ( 5 mg ÷ 1 kg )
= 100 mg
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