Normal weight for 1 month olds (kg)
The average weight for 1 month old baby boys is 4.9 kg and 1 month old baby girls average 4.5 kg1 The tables below show the distribution of weight by percentile of the 1 month year old population.
Current units = kilograms. View this page in pounds.
Body weight percentile table for 1 month old baby boys
| Percentile | Weight |
|---|---|
| 3rd | 3.6 kg |
| 5th | 3.8 kg |
| 10th | 4 kg |
| 25th | 4.4 kg |
| 50th | 4.9 kg |
| 75th | 5.3 kg |
| 90th | 5.7 kg |
| 95th | 6 kg |
| 97th | 6.1 kg |
Body weight percentile table for 1 month old baby girls
| Percentile | Weight |
|---|---|
| 3rd | 3.4 kg |
| 5th | 3.5 kg |
| 10th | 3.8 kg |
| 25th | 4.1 kg |
| 50th | 4.5 kg |
| 75th | 4.9 kg |
| 90th | 5.3 kg |
| 95th | 5.5 kg |
| 97th | 5.7 kg |
Source Citations
- Robert J. Kuczmarski Dr.P.H. et al., Centers for Disease Control and Prevention, U.S. Department of Health & Human Services 2000 CDC Growth Charts for the United States: Methods and Development
- American Academy of Pediatrics Is Your Child Overweight?