Expected Weight Gain Reference Calculator
Reviewed by Hamza Gujjar, Algorithm Architect & Software Developer
Last updated: July 27, 2026
Disclaimer: This calculator is provided for informational and educational purposes only and does not constitute financial, medical, legal, or other professional advice. Always consult a qualified professional before making decisions based on these results.
A comparison point for your baby's own measured gain
Weight gain rate is fastest in the first 3 months of life and steadily slows through the second year as growth velocity naturally decreases - these reference ranges give a general comparison point for a baby's actual measured gain rate.
Worked example
For a 2-month-old baby:
Typical Range = 20-30 g/day (140-210 g/week)
| Age | Typical Daily Gain Range |
|---|---|
| 0-3 months | 20-30 g/day |
| 3-6 months | 15-20 g/day |
| 6-12 months | 10-15 g/day |
| 12-24 months | 5-10 g/day |
Individual healthy babies vary considerably around these general ranges - any concerns about your baby's growth should always be discussed directly with your pediatrician rather than relying on general reference ranges alone.