Baby Growth Calculator by Week

Tracking your baby's growth by week is essential for monitoring their development. This calculator helps you track weight, height, and head circumference, providing insights into your baby's growth patterns and helping you identify any potential concerns.

How to Use This Calculator

Using the baby growth calculator is simple. Follow these steps:

Enter your baby's age in weeks (0-52 weeks)
Select your baby's gender (optional)
Enter your baby's weight in pounds or kilograms
Enter your baby's height in inches or centimeters
Enter your baby's head circumference in inches or centimeters
Click the "Calculate" button

The calculator will display your baby's growth percentile and compare it to average growth patterns. You'll receive a detailed analysis of your baby's growth, including whether they're growing at a healthy rate.

Baby Growth Stages by Week

Babies grow rapidly during the first year of life. Here's a general overview of growth stages:

Week	Milestone	Key Development
0-4 weeks	Newborn	Basic survival skills, reflexes, and early sensory development
5-8 weeks	Early Infant	Improved motor skills, better head control, and social smiling
9-12 weeks	Active Infant	Grasping objects, sitting with support, and cooing sounds
13-16 weeks	Mobile Infant	Rolling over, reaching for objects, and babbling sounds
17-20 weeks	Independent Infant	Sitting without support, transferring objects, and first words

These are general guidelines. Every baby develops at their own pace, and some milestones may be reached earlier or later than expected.

Key Measurements to Track

Tracking these key measurements helps monitor your baby's growth:

Weight: Helps determine if your baby is gaining weight appropriately
Height: Shows how tall your baby is compared to average growth
Head Circumference: Indicates brain development and growth

Important Note

Always consult with your pediatrician if you have concerns about your baby's growth. While this calculator provides general guidance, it's not a substitute for professional medical advice.

Growth Comparison Table

Compare your baby's growth to average measurements:

Week	Average Weight (lbs)	Average Height (in)	Average Head Circumference (in)
0-4	6.6-8.8	19.3-20.5	12.6-13.4
5-8	7.7-9.9	20.1-21.3	13.0-13.8
9-12	8.8-10.9	20.9-22.1	13.4-14.2
13-16	9.9-12.0	21.7-22.9	13.8-14.6
17-20	11.0-13.1	22.5-23.7	14.2-15.0

These averages are based on general population data. Individual variations are normal.

Frequently Asked Questions

How often should I track my baby's growth?

It's recommended to track growth at each well-child visit, typically every 2-4 weeks during the first year. After the first year, visits may be less frequent.

What should I do if my baby's growth seems slow?

If you're concerned about your baby's growth, consult your pediatrician. They can provide guidance and may recommend additional tests if needed.

Can this calculator replace doctor visits?

No, this calculator provides general guidance but should not replace professional medical advice. Always consult with your pediatrician for personalized recommendations.