How much energy does a baby use daily?

A newborn baby typically uses about 50-55 kilocalories per kilogram of body weight per day. For an average baby weighing around 3.5 kg (7.7 lbs), this translates to approximately 175-200 kilocalories daily. As infants grow, their energy requirements increase, with older babies needing around 90-100 kilocalories per kilogram. Overall, energy needs vary based on age, weight, and activity level.