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Free ASQ Calculator Online

Determine the exact developmental screening age for the Ages and Stages Questionnaire (ASQ) adjusted for prematurity.

Inputs

Results

Adjusted Screening Age
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Chronological Age: Enter dates...

Developmental Screening Age Adjustments

Estimate ASQ screening intervals and adjust for premature births to identify the correct developmental questionnaire sheet.

Frequently Asked Questions (FAQ)

What is the ASQ screening age?

The ASQ uses specific questionnaires tailored for ages 1 month to 5.5 years. Finding the exact age in months and days determines which questionnaire to administer.

How does prematurity affect the screening?

If a child is born three or more weeks premature, and is under 24 months old, their age must be adjusted to ensure developmental screening aligns with biological rather than chronological benchmarks.

When should I stop adjusting for prematurity?

Clinical guidelines recommend stopping age adjustments for prematurity once the child reaches 24 months of chronological age.

What is a month in ASQ calculations?

A month is mathematically standardized as 30.4375 days (365 days / 12 months).

Is my child's birth date kept secure?

Yes, all date operations run locally in your browser. We track and store nothing.