Normal weight for 3 month olds (kg)
The average weight for 3 month old baby boys is 6.4 kg and 3 month old baby girls average 5.9 kg1 The tables below show the distribution of weight by percentile of the 3 month year old population.
Current units = kilograms. View this page in pounds.
Body weight percentile table for 3 month old baby boys
| Percentile | Weight |
|---|---|
| 3rd | 5 kg |
| 5th | 5.2 kg |
| 10th | 5.4 kg |
| 25th | 5.9 kg |
| 50th | 6.4 kg |
| 75th | 6.9 kg |
| 90th | 7.5 kg |
| 95th | 7.8 kg |
| 97th | 8 kg |
Body weight percentile table for 3 month old baby girls
| Percentile | Weight |
|---|---|
| 3rd | 4.5 kg |
| 5th | 4.7 kg |
| 10th | 5 kg |
| 25th | 5.4 kg |
| 50th | 5.9 kg |
| 75th | 6.4 kg |
| 90th | 6.8 kg |
| 95th | 7.1 kg |
| 97th | 7.3 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?