Developmental Milestones Checker

1 What is the Developmental Milestones Checker?

The Developmental Milestones module is a hub of five linked tools for tracking a child's development against normative milestone ages. Its Smart View supports bidirectional lookup — pick an age to see expected milestones, or pick what a child is doing to estimate developmental age — while Browse by Domain lists every milestone across six domains: Gross Motor, Fine Motor, Language, Hearing, Socioadaptive, and Vision. The milestone data is sourced verbatim from AIIMS New Delhi's Department of Paediatrics, Child Neurology Division (Prof. Sheffali Gulati), with cross-source enrichment for Developmental Quotient interpretation bands drawn from Nelson and Ghai.

2 When to use it

Checking which gross motor, fine motor, language, hearing, socioadaptive, or vision milestones a child is expected to have reached by a given age.
Estimating a child's developmental age from the skills they are currently demonstrating.
Screening for developmental red flags — the tool lists 23 age-by-domain combinations that warrant formal developmental assessment.
Calculating a per-domain Developmental Quotient (DQ) with interpretation bands.
Correcting chronological age for prematurity, since the tool's own guidance says to always correct gestational age for infants 24 months or younger.
Cross-checking a child's status against the Trivandrum Developmental Screening Chart via the linked assistant tool.

3 Formula & method

The hub itself routes to five sub-tools rather than computing a single score. The one formula it states directly is for Developmental Quotient: 'DQ = (Developmental age / Chronological age) × 100', calculated per domain with interpretation bands. The Red Flags tool separately lists 23 age-by-domain flags, and the milestone ages throughout are described as the ages by which most healthy children achieve the skill, rather than fixed pass/fail cutoffs — the tool's own disclaimer notes that failing to achieve a milestone at the listed age does not equal pathology, but it should trigger formal screening.

AIIMS New Delhi, Department of Paediatrics, Child Neurology Division (Prof. Sheffali Gulati)

4 Frequently asked questions

How is Developmental Quotient (DQ) calculated?

DQ = (Developmental age / Chronological age) × 100, calculated separately for each developmental domain with interpretation bands.

Does missing a milestone always mean there's a problem?

No — per the tool's own disclaimer, milestone ages are the ages by which most healthy children achieve the skill; not achieving one at the listed age does not equal pathology, but it should trigger formal screening.

Do I need to adjust for prematurity?

Yes — the tool instructs users to always correct gestational age for infants 24 months or younger.

What domains does the milestone checker cover?

Six: Gross Motor, Fine Motor, Language, Hearing, Socioadaptive, and Vision.

Where do the milestone ages come from?

They are sourced verbatim from AIIMS New Delhi's Department of Paediatrics, Child Neurology Division (Prof. Sheffali Gulati), with DQ interpretation bands cross-enriched from Nelson and Ghai.

5 Related tools

For qualified clinicians. This page and the PediAid app are a clinical aid only. Calculations and reference data must be verified against the patient's clinical context, the source guideline and your local protocols before any treatment decision is made.