Baby Weight Chart by Month in KG
Track your baby's healthy growth with this monthly weight chart in kilograms. Learn what’s normal, when to worry, and how to support weight gain with expert tips.
Written by Dr. J T Hema Pratima
Reviewed by Dr. Dhankecha Mayank Dineshbhai MBBS
Last updated on 30th Jul, 2025
Welcoming a new baby into your life is a joyous experience, but it also comes with many questions—especially about your little one’s growth. One of the most common concerns parents have is whether their baby is gaining weight at a healthy rate.
To help ease your worries, we’ve put together a simple guide on baby weight charts by month in kilograms (KG). This will give you a general idea of what to expect while keeping in mind that every baby grows at their own pace.
Understanding Baby Weight Growth
A baby’s weight is a key indicator of their overall health and development. Doctors track weight gain to ensure your baby is getting enough nutrition and growing properly. While there’s no single "perfect" weight for all babies, there are general guidelines based on averages.
Average Baby Weight at Birth
Full-term babies (born at 37-40 weeks): Usually weigh between 2.5 to 4.5 kg at birth.
Low birth weight: Below 2.5 kg (may need extra care).
High birth weight: Above 4.5 kg (common in babies of diabetic mothers).
Baby Weight Chart by Month (in KG)
Here’s a general weight range for babies from birth to 12 months:
| Age | Boys (KG) | Girls (KG) |
| Newborn | 2.5 - 4.5 | 2.5 - 4.3 |
| 1 Month | 3.4 - 5.7 | 3.2 - 5.4 |
| 2 Months | 4.4 - 7.0 | 4.0 - 6.5 |
| 3 Months | 5.1 - 7.9 | 4.6 - 7.4 |
| 4 Months | 5.6 - 8.6 | 5.1 - 8.1 |
| 5 Months | 6.1 - 9.2 | 5.5 - 8.7 |
| 6 Months | 6.4 - 9.7 | 5.8 - 9.2 |
| 7 Months | 6.7 - 10.2 | 6.1 - 9.6 |
| 8 Months | 7.0 - 10.5 | 6.3 - 10.0 |
| 9 Months | 7.2 - 10.9 | 6.6 - 10.4 |
| 10 Months | 7.5 - 11.2 | 6.8 - 10.7 |
| 11 Months | 7.7 - 11.5 | 7.0 - 11.0 |
| 12 Months | 7.8 - 11.8 | 7.1 - 11.3 |
Note: These are approximate ranges. Some babies may be slightly above or below these numbers and still be healthy.
Factors Affecting Baby’s Weight
Several factors influence a baby’s weight, including:
Genetics – Parents' body types play a role.
Feeding method – Breastfed and formula-fed babies may gain weight differently.
Birth weight – Smaller babies may catch up over time.
Health conditions – Premature babies or those with medical issues may grow at a different pace.
When to Be Concerned?
While slight variations are normal, consult your pediatrician if:
Your baby is not gaining weight or losing weight.
There’s a sudden drop in weight percentile.
Your baby seems weak, dehydrated, or not feeding well.
Tips for Healthy Weight Gain in Babies
Here are some tips for a healthy weight gain in babies:
1. Ensure Proper Feeding
Breastfed babies: Feed on demand (8-12 times a day).
Formula-fed babies: Follow the pediatrician’s recommended quantity.
After 6 months: Introduce solid foods like mashed fruits, veggies, and cereals.
Consult a Top Pediatrician for the best advice
2. Monitor Growth Regularly
Regular check-ups help track weight trends.
Use growth charts provided by your doctor.
3. Look for Hunger Cues
Rooting (turning head toward touch).
Sucking on hands.
Crying (late hunger sign).
4. Avoid Overfeeding
Overfeeding can cause discomfort or excessive weight gain.
Follow your baby’s natural appetite.
When to See a Doctor?
If you’re worried about your baby’s weight, don’t hesitate to consult a pediatrician. You can easily book a consultation or schedule a growth check-up through Apollo 24|7 for expert guidance.
Conclusion
Every baby grows at their own pace, and slight variations in weight are normal. Instead of comparing your baby to others, focus on their overall health, activity, and feeding patterns. Regular doctor visits will ensure they’re on the right track.
If you have any concerns, reach out to a healthcare professional—they’re there to help you and your little one stay healthy and happy!
Consult a Top Pediatrician for the best advice
Consult a Top Pediatrician for the best advice
Dr. Bhukya Pavan Kalyan
General Physician
5 Years • MBBS DNB Paediatrics
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PRESTIGE SHANTHINIKETAN - SOCIETY CLINIC, Bengaluru
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4 Years • MBBS, Psychiatry ( MD Psychiatry), MIPS
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Dr. Jinesh Shah
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20 Years • MBBS, MRCPsych (UK), CCT in Adult Psychiatry (UK), CCT in Child and Adolescent Psychiatry (UK), PG Diploma in Clinical Psychiatry (UK), Cert Hypnotherapy (UK).
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6 Years • MBBS,DNB Psychiatry ,MRC Psychiatry, Postgraduate certification in Child and Adolescence Mental Health Certification in Perinatal Mental Health
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Dr. Charan Kumar Pottem
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5 Years • MBBS, MD Psychiatry(NIMHANS)
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