The Lusaka equation can be used to estimate the body weight of a pediatric patient in a developing country.The equation was derived at the University of Zambia in Lusaka, Zambia.

Patient selection: pediatric patient <= 14 years



(1) age of the patient in months if under 1 year of age

(2) age of the patient in years if over 1 year of age



Estimated Weight in Kilograms

< 1 year

((age in months) / 2) + 3.5

> 1 year

(2 * (age in years)) + 7



• Tendency to underestimate weight (mean bias -0.5 kg)

To read more or access our algorithms and calculators, please log in or register.