1. The normal range of weight for a 1-year-old baby. At the age of 1 year, the baby\’s weight is usually between 8-12 kg. However, every baby grows at a different rate, so this range is only a rough guide. If your child\’s weight is above or below this range, talk to your doctor. 2. Factors affecting baby\’s weight 1. Genetic factors: The height and body shape of parents usually affect the growth, development and weight of their children. 2. Diet: children’s eating habits