Chronological age (CA) is age computed in years, months, and days from a specific reference date. Used in school admissions (Indian schools assess on April 1 / June 1), developmental psychology / IQ tests (Wechsler, Stanford-Binet), language and learning assessments, and pediatric medical evaluations.
When to use this
Use to: fill school admission forms that ask for 'age as on April 1', compute age for IQ test scoring (mental age / chronological age ratio), prep age-relative assessments for developmental psychologists, calculate test-result percentiles where chronological age matters.
Frequently Asked Questions
What's the difference from regular age?
Regular age is just age 'today'. Chronological age is age 'on a specific date' - usually April 1 or June 1 for Indian school admissions. CA also expresses the result in years-months-days (e.g. '6 years 4 months 12 days') rather than just years.
Which date should I use for school admissions?
Indian schools traditionally use April 1 (start of academic year) or June 1 (some states). CBSE / NCERT guidance: minimum age 6 years for Class 1 (computed as on March 31). Check the specific school's prospectus - cutoff dates vary.
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