Baby Growth Chart
Compare your baby's weight with WHO growth standards.
WHO Weight Table (50th Percentile)
| Age | 👦 Boys | 👧 Girls |
|---|---|---|
| Birth | 3.3 kg | 3.2 kg |
| 1 month | 4.5 kg | 4.2 kg |
| 2 months | 5.6 kg | 5.1 kg |
| 3 months | 6.4 kg | 5.8 kg |
| 4 months | 7 kg | 6.4 kg |
| 5 months | 7.5 kg | 6.9 kg |
| 6 months | 7.9 kg | 7.3 kg |
| 7 months | 8.3 kg | 7.6 kg |
| 8 months | 8.6 kg | 7.9 kg |
| 9 months | 8.9 kg | 8.2 kg |
| 10 months | 9.1 kg | 8.5 kg |
| 11 months | 9.4 kg | 8.7 kg |
| 12 months | 9.6 kg | 8.9 kg |
| 15 months | 10.3 kg | 9.6 kg |
| 18 months | 10.9 kg | 10.2 kg |
| 21 months | 11.5 kg | 10.9 kg |
| 24 months | 12.2 kg | 11.5 kg |
Source: WHO Child Growth Standards, 2006
FAQ
What are percentiles?
Percentiles show where your baby's weight falls compared to other babies of the same age. The 50th percentile is average. Between the 3rd and 97th percentile is normal. What matters most is that your baby follows their own curve consistently.
My baby is below the 3rd percentile — is that dangerous?
Not necessarily. Some babies are naturally smaller or lighter. What matters is development over time — does your baby follow their own curve? If weight drops suddenly, talk to your paediatrician.
Why is my baby suddenly gaining less weight?
Around 4-6 months, growth naturally slows down. Illness, teething, or starting solids can temporarily affect weight gain. If it lasts more than 2-3 weeks, discuss it at your next check-up.
How often should I weigh my baby?
In the first 6 months, your baby is weighed at every check-up. At home, once a week is enough. Daily weighing only creates stress — fluctuations of 100-200g are normal depending on feeds, nappy, time of day.
This calculator is based on WHO growth standards and serves as guidance. It does not replace paediatric assessment.