Many studies have reported a high correlation between birth weight and other anthropometric measurements in newborns. A WHO collaborative study identified arm and chest circumferences as the most appropriate indicators The study also identified cut off points, with the caveat that a single cut off point may not be valid globally. Each region/country will need to identify the cut off points most suitable for them. This study aimed to identify the most appropriate indicator and its cut off point for identifying low birthweight babies in northern India