Average Baby Weight Chart Calculator

Tracking a baby's weight is an important part of monitoring their growth and development. This calculator provides average weight charts for newborns to infants, helping parents and caregivers assess whether their baby is growing at a healthy rate.

How to Use This Calculator

To use the average baby weight chart calculator:

Enter your baby's age in weeks (0-52 weeks)
Select the gender (male or female)
Click "Calculate" to generate the weight chart
Review the results and compare your baby's weight to the average

This calculator uses standard growth charts based on average measurements from the World Health Organization (WHO) and Centers for Disease Control and Prevention (CDC).

Interpreting the Results

The calculator will display:

The average weight range for your baby's age and gender
A visual chart showing the growth curve
Percentile rankings to indicate if your baby is below, at, or above average

If your baby's weight falls outside the 5th-95th percentile range, consult with a healthcare provider to rule out any potential issues.

Average weight (grams) = (Age in weeks × 0.5 + 3000) × Gender factor
Gender factor: 1.0 for male, 0.95 for female

Baby Weight Chart

The chart below shows the average weight range for babies of different ages. The blue area represents the typical range, while the green line shows the median weight.

Use the calculator to generate a personalized chart for your baby's specific age and gender.

Frequently Asked Questions

How often should I weigh my baby?

Newborns should be weighed immediately after birth and then weekly for the first month. After that, weigh them every 2-4 weeks until they're 3 months old, then monthly until they're 1 year old.

What's a normal weight gain for a baby?

Newborns typically gain about 10-20% of their birth weight in the first week. After that, they should gain about 5-10% of their birth weight each week. Consult your pediatrician if you notice unusual weight changes.

When should I be concerned about my baby's weight?

Contact your healthcare provider if your baby's weight falls outside the 5th-95th percentile range on the growth chart, or if you notice significant weight loss or gain that doesn't match the expected pattern.