Weight is a key indicator of your baby good nutrition and physical development. It be helpful to know about babies’ healthy average weight month by month. If your baby’s weight is in a lower percentile, this does not necessarily sign of a problem with their growth & physical development. Knowing the health average weight chart can help a person generally track their baby’s growth.
According to the WHO, the healthy average birth weight of a male baby is about 3.3 kilograms (KG), while the healthy average birth weight of a female is about 3.2 kg. kindly note that at delivery, doctors highlights that a low birth weight to be less than about 2.5 kg. professionals also add that it is common for babies to lose about 10% of their weight shortly after birth. This decrease is due to fluid loss and most of the babies gain back this weight within 1 week. In addition, the healthy average weight of a baby born at 37–40 weeks ranges from 2.5 to 4 kg.
Baby weight chart by age
The below chart shows baby average healthy weights in the 50th percentile. Male babies may tend to be in a more weigh than female babies. Babies may grow fast and gain weight within the first 6 months of life .
Having a knowledge about your baby average weights by month can help you gauge your baby physical development, but doctors also look for other important indicators, such as length and head circumference.
| Baby age |
Female 50th percentile weight |
Male 50th percentile weight |
| Birth | 7 lb 2 oz (3.2 kg) | 7 lb 6 oz (3.3 kg) |
| 1 month | 9 lb 4 oz (4.2 kg) | 9 lb 14 oz (4.5 kg) |
| 2 months | 11 lb 5 oz (5.1 kg) | 12 lb 4 oz (5.6 kg) |
| 3 months | 12 lb 14 oz (5.8 kg) | 14 lb 1 oz (6.4 kg) |
| 4 months | 14 lb 3 oz (6.4 kg) | 15 lb 7 oz (7.0 kg) |
| 5 months | 15 lb 3 oz (6.9 kg) | 16 lb 9 oz (7.5 kg) |
| 6 months | 16 lb 1 oz (7.3 kg) | 17 lb 8 oz (7.9 kg) |
| 7 months | 16 lb 14 oz (7.6 kg) | 18 lb 5 oz (8.3 kg) |
| 8 months | 17 lb 8 oz (7.9 kg) | 18 lb 15 oz (8.6 kg) |
| 9 months | 18 lb 2 oz (8.2 kg) | 19 lb 10 oz (8.9 kg) |
| 10 months | 18 lb 11 oz (8.5 kg) | 20 lb 3 oz (9.2 kg) |
| 11 months | 19 lb 4 oz (8.7 kg) | 20 lb 12 oz (9.4 kg) |
| 12 months | 19 lb 12 oz (8.9 kg) | 21 lb 4 oz (9.6 kg) |
