Baby Milestone Tracker Calculator
Milestones by Age
See expected milestones for your baby's age
Formula
Milestones based on CDC and AAP developmental guidelines across five domains: gross motor, fine motor, language, social/emotional, and cognitive development. Age ranges represent typical achievement windows.
Frequently Asked Questions
When should I be concerned about developmental milestones?
Talk to your pediatrician if your child: doesn't smile by 3 months, doesn't babble by 9 months, doesn't use any words by 16 months, doesn't walk by 18 months, loses previously acquired skills at any age, or if you have any concerns. Early intervention can make a significant difference.
Do premature babies reach milestones later?
Yes. For premature babies, use their 'adjusted age' (actual age minus weeks premature) when tracking milestones for the first 2 years. A baby born 2 months early should be expected to reach 6-month milestones at 8 months actual age.
What are the most important milestones to track?
Key milestones that pediatricians monitor closely include: social smile (2 months), sitting independently (6 months), babbling (9 months), first words (12 months), walking (12-15 months), 2-word phrases (24 months), and following 2-step instructions (24 months).
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