Written & medically reviewed by Dr. Sanjay Anbu, MBBS· Last reviewed
Babies grow at different rates, so a healthy weight is a range, not one number. What matters most is a steady curve on the growth chart — not comparing your baby to others.
Babies often lose a little weight in the first week, then regain it
Roughly doubles birth weight by ~4–6 months
Roughly triples birth weight by ~1 year
Steady growth along the chart matters more than a single reading
When to see a doctor urgently
Not regaining birth weight by 2–3 weeks
Crossing downward across growth-chart lines (faltering growth)
Very few wet nappies or signs of poor feeding
Sudden weight loss or a persistently very unwell baby
The curve matters more than the number. Doctors track growth on WHO/IAP charts over time. One low or high reading is rarely a problem — a change in the trend is what counts. MedDroid gives general information, not a diagnosis.
Frequently asked questions
How much should my baby weigh?
It varies a lot. As a rough guide, babies double their birth weight by about 4–6 months and triple it by a year — but a steady growth curve matters more than the exact number.
My baby lost weight after birth — is that normal?
Yes, a small loss in the first week is normal; most babies regain their birth weight by around 2 weeks. Tell your doctor if they do not.
When should I worry about my baby’s weight?
If they are not regaining birth weight, dropping across chart lines, feeding poorly or seem unwell — have them checked.
Reviewed by Dr. Sanjay Anbu, MBBS. MedDroid is an AI medical assistant and can make mistakes. It provides general health information, not a diagnosis or medical advice — always consult a qualified clinician. In an emergency, contact your local emergency number immediately.