1–66 months Evidence-based Free & private

ASQ-3 Calculator — Ages & Stages Questionnaire Scoring

Score the Ages & Stages Questionnaire (ASQ-3) instantly across all five domains. Free, accurate, and aligned with official cutoffs.

Start calculating Learn about ASQ-3 Calculator — Ages & Stages Questionnaire Scoring
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ASQ-3 Calculator

Ages 1 month – 66 months

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Medically reviewed by ASQCalculator Editorial Team
Last reviewed: June 25, 2026Review policyMethodology

Understanding this tool

Plain-language explanations grounded in current pediatric evidence.

TL;DR

The ASQ-3 is a parent-completed developmental screener for children 1–66 months. Score each of the five domains (communication, gross motor, fine motor, problem solving, personal-social) against the official age-interval cutoffs to decide whether to monitor, rescreen, or refer.

What it is

The Ages & Stages Questionnaire, Third Edition (ASQ-3) is a parent-completed developmental screener for children 1 through 66 months across five domains: communication, gross motor, fine motor, problem solving, and personal-social.

How it's calculated

Each domain has 6 items scored 0/5/10. Totals are compared to age-interval cutoffs published with the ASQ-3. Scores above the monitoring cutoff are typical; between monitor and refer, monitor and rescreen; at or below refer, share with a clinician.

When to use it

Recommended at well-child visits at 9, 18, 24/30 months and any time a parent or clinician is concerned.

Who should use it

Parents, pediatricians, home visitors, early-intervention teams, Early Head Start, and child-care professionals.

Clinical importance

Early identification of developmental delay enables earlier intervention, which has well-established long-term cognitive, social, and educational benefits.

Example

A 12-month-old scoring 25 on Gross Motor (below the 12-month refer cutoff of 33.27) would prompt a clinical referral for further evaluation.

How to use this calculator

  1. 1
    Pick the right age interval
    Choose the ASQ-3 questionnaire that matches your child's age (or corrected age if born before 37 weeks).
  2. 2
    Answer every item
    For each item, select Yes (10), Sometimes (5), or Not Yet (0) based on what your child does on their own.
  3. 3
    Add domain totals
    Sum the six items in each of the five domains: communication, gross motor, fine motor, problem solving, personal-social.
  4. 4
    Compare to cutoffs
    Compare each total to the published monitoring and referral cutoffs for the age interval.
  5. 5
    Share with your pediatrician
    Save or print the results and bring them to your next well-child visit, especially if any score falls in the monitor or refer zones.

Common mistakes to avoid

  • Using chronological age for a preterm baby under 24 months instead of corrected age.
  • Picking the closest age interval rather than the one specified by the ASQ-3 age windows.
  • Scoring an item as 'Yes' when your child only does it with help — the criterion is independent performance.
  • Treating a score in the refer range as a diagnosis; it warrants further evaluation, not a label.
  • Skipping items rather than marking 'Not Yet' when your child hasn't shown the skill.

Glossary

Screener
A short tool used to flag children who may need a fuller diagnostic evaluation; not a diagnosis.
Cutoff
A score threshold that separates 'typical', 'monitor', and 'refer' zones for a given age interval.
Domain
One of the five developmental areas measured by ASQ-3.
Corrected age
Age adjusted for prematurity — used until 24 months for babies born before 37 weeks.

Medical references

Frequently asked questions

Answers parents and pediatric professionals ask most often about this tool.

Explore related topics

Developmental Screening

How developmental screening works, when to screen, and how to use validated tools like the ASQ-3 to catch delays early.

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Developmental Milestones

A practical guide to communication, motor, problem-solving, and social milestones — with calculators that turn dates into actionable insight.

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Preterm & Corrected Age

Why corrected age matters for premature infants, how to calculate it, and how to apply it to growth charts and developmental screening.

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    Official ASQ-3 cutoffs
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Medical disclaimer. This calculator is an educational tool and does not replace evaluation by a qualified pediatric clinician. If you are concerned about your child's development or health, contact your pediatrician.