Requirements: Compatible with iPhone and iPad. Requires iOS 16.0 or later.
The Chronological Age Calculator is the go-to tool for professionals who need exact age calculations down to the day. Originally built in 2013 for speech-language pathologists, it's now used by thousands of SLPs, psychologists, educators, and special education teams across the country.
The app uses the Pearson borrow-30 method — the same calculation standard required by major standardized assessments including the CELF, PLS, GFTA, PPVT, and Goldman-Fristoe. Unlike generic age calculators, this method correctly handles month-length variations and borrowing across month boundaries, giving you the precise years-months-days result that test manuals demand.
Speech-Language Pathologists, school psychologists, occupational therapists, special education teachers, clinical psychologists, developmental pediatricians — anyone who administers standardized assessments and needs accurate chronological age. Save a few minutes on every evaluation.
In a hurry or don't have an iPhone. You can use our Online Chronological Age Calculator.
This free online utility calculates a person’s exact chronological age, all the way down to the day. Open Online Age Calculator!