Child Development Milestone Tracker

View expected developmental milestones by age and domain based on CDC guidelines (informational only).

Child Age (months)

Domain (1=Motor, 2=Language, 3=Cognitive, 4=Social)

Tab to move between fields

Expected Milestone Count

Baseline Score (percentile)50

Typical Percentile50

How to Use This Calculator

Enter child age in months (0–72) and select the developmental domain to assess.
Review Expected Milestone Count for that domain and age group.
Use the baseline assessment score and percentile to contextualize your observations.
Consult a pediatric specialist if a child is significantly below expected milestones for their age.

How the result changes with Child Age (months)

Child Age (months): Child's age in months (0-72 months / 0-6 years)
Domain (1=Motor, 2=Language, 3=Cognitive, 4=Social): Developmental domain to assess milestones for

Identify Input Parameters
Child Age (months) = 24, Domain (1=Motor, 2=Language, 3=Cognitive, 4=Social) = 1 = 2 input(s) provided
Calculate Expected Milestone Count
8 = 8
Calculate Baseline Score
Baseline Score
50 = 50
Calculate Typical Percentile
Typical Percentile
50 = 50

Engine last updated August 4, 2026. Checked against 2 independently-derived tests — how we verify calculators.

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