Low birth weight is defined as
Low birth weight (LBW) neonate- A neonate weighing less than 2500g at birth irrespective of the gestational age.
Very low birthweight (VLBW) neonate- A neonate weighing leas than 1500g at birth irrespective of the gestational age.
Extremely low birth weight (ELBW) neonate- A neonate weighing leas than 1000g at birth irrespective of the gestational age.
Weight < 10 percentile for their gastational age
Weight < 2.0 kg
Weight < 1.5 kg
Weight < 2.5 kg