What is a healthy weight for my baby?

A healthy weight varies based on your baby's age, sex, and individual growth pattern. Rather than focusing on a specific number, pediatricians look at whether your baby is following a consistent growth curve on the WHO or CDC growth charts. Most healthy babies fall between the 5th and 95th percentiles. What matters most is that your baby maintains their growth trajectory over time.

What do baby percentiles mean?

Baby percentiles compare your child's measurements to other children of the same age and sex. For example, if your baby is in the 60th percentile for weight, it means they weigh more than 60% of babies their age and less than 40%. Percentiles are not grades - a baby in the 20th percentile can be just as healthy as one in the 80th percentile. The key is consistent growth along their own curve.

When should I worry about my baby's growth?

Consult your pediatrician if your baby's growth crosses two or more percentile lines (up or down), falls below the 3rd percentile or above the 97th percentile, shows no weight gain for an extended period, or if you notice other concerning symptoms like poor feeding, lethargy, or developmental delays. Regular well-baby checkups help monitor growth patterns effectively.

How often should I track my baby's growth?

During the first year, pediatricians typically measure growth at well-baby visits: at birth, 1 week, 1 month, 2 months, 4 months, 6 months, 9 months, and 12 months. After the first year, measurements are usually taken every 3-6 months. At home, weighing weekly or monthly can help you stay informed, but avoid daily weighing as normal fluctuations can cause unnecessary worry.

What affects baby growth rates?

Multiple factors influence baby growth rates including genetics (parental height and build), nutrition (breast milk, formula, or solid foods), birth weight and gestational age, overall health, sleep quality, and activity level. Premature babies may follow adjusted growth curves initially. Environmental factors and chronic health conditions can also impact growth patterns.

Are WHO and CDC growth charts different?

Yes, WHO and CDC growth charts use different reference populations. WHO charts (recommended for children under 2) are based on breastfed babies from multiple countries and represent how children should grow under optimal conditions. CDC charts (often used for children 2-20) reflect how American children actually grew. WHO charts tend to show slightly lower weight percentiles, which can affect how growth is interpreted.

Baby Growth Tracker

Track your baby's weight, length, and head circumference against growth percentiles

Track Your Baby's Growth

Enter measurements to estimate growth percentiles

Gender

Age (months)

Weight (lbs)

Length (in)

Head (in)

First Checkup

2-Month Visit

4-Month Visit

6-Month Visit

9-Month Visit

12m

1 Year!

18m

18-Month Visit

24m

2 Years!

Common Questions

What do percentiles mean?

How often should I track growth?

What if my baby changed percentiles?

Are these calculations accurate?

Medical Disclaimer

This calculator provides educational estimates only and is not a substitute for professional medical advice. Always consult your pediatrician or healthcare provider for guidance specific to your child.

Last reviewed: December 2024|

Sources:CDC Growth Charts WHO Standards AAP