Multiply the weight in kilograms by the ordered mg/kg. When the order is a daily amount divided across the day, divide the daily total by the number of doses to get each dose.
What each part means
Weight
Patient weight in kilograms
mg/kg
Ordered dose per kilogram
Worked example
10 kg × 10 mg/kg = 100 mg; if divided q6h (4 doses/day): 100 ÷ 4 = 25 mg/dose.