Child’s Age
Enter the exact age or click any quick age chip to view only that age's developmental parameters.
CLINICAL DOMAIN CHECKLIST
1 Year (12 Months) — 5 Domains
Fine Motor
Language & Comm.
Cognitive
Social-Emotional
CLINICAL DOMAIN CHECKLIST
2 Years (24 Months) — 5 Domains
Gross Motor
Fine Motor
Language & Comm.
Cognitive
Social-Emotional
CLINICAL DOMAIN CHECKLIST
3 Years (36 Months) — 5 Domains
Gross Motor
Fine Motor
Language & Comm.
Cognitive
Social-Emotional
CLINICAL DOMAIN CHECKLIST
4 Years (48 Months) — 5 Domains
Gross Motor
Fine Motor
Language & Comm.
Cognitive
Social-Emotional
CLINICAL DOMAIN CHECKLIST
5 Years (60 Months) — 5 Domains
Gross Motor
Fine Motor
Language & Comm.
Cognitive
Social-Emotional
No Age Selected
Enter completed years and additional months above, or choose an age preset to view age-specific developmental skills and warning signs.
Frequently Asked Questions
When do babies smile, sit, crawl and walk?
Most babies give a social smile by 6–8 weeks, hold their head steady by 3–4 months, roll over by 4–6 months, sit without support by 6–8 months, crawl around 9 months and walk alone between 12 and 15 months.
When should my baby start talking?
Babbling such as “baba” or “mama” starts around 6–9 months, the first meaningful words around 12 months, and two-word phrases such as “more milk” by 2 years.
My baby is late on a milestone. Should I worry?
Children reach milestones across a wide age range, so one slightly late skill is often normal. See your doctor if several milestones are delayed, a red flag sign appears, or your child loses a skill they already had.
What are developmental red flags?
Examples include no social smile by 2 months, no head control by 4 months, not sitting by 9 months, not walking by 18 months, no words by 16 months, no two-word phrases by 2 years, and any loss of speech or skills at any age.
How do I check milestones for a premature baby?
Use corrected age until about 2 years: subtract the number of weeks your baby was born early from their actual age.
How can I help my child’s development?
Talk, sing and read to your child daily, give tummy time to babies, play simple back-and-forth games, and avoid screen time under 2 years except video calls with family.