# Chronological Age Calculator — Agentic & LLM Documentation

> Chronological Age Calculator (https://chronoagecalc.online/) is a free, high-precision, client-side clinical and educational calculation suite. Designed for school psychologists, speech-language pathologists (SLPs), pediatric clinicians, parents, and educators.

## Primary Tools & Endpoints

- [Chronological Age Calculator](https://chronoagecalc.online/): Main application for calculating exact elapsed chronological age from Date of Birth to Reference / Test Date in Years, Months, Days, Hours, and Minutes.
- [Testing & Assessment Age Calculator](https://chronoagecalc.online/testing-calculator.html): Clinical assessment tool formatting age into standard semicolon notation (`Y;M;D`) for Pearson (WISC-V, WAIS), Woodcock-Johnson, and school district IEP evaluation documentation.
- [Pediatric Preterm Adjusted Age Calculator](https://chronoagecalc.online/pediatric-age.html): Pediatric tool utilizing the American Academy of Pediatrics (AAP) 2-Year Rule to calculate corrected age for infants born prior to 37 completed gestational weeks.
- [Age Difference Calculator](https://chronoagecalc.online/age-difference.html): Bilateral date comparison tool calculating the exact age gap between two people or historical dates.
- [USA School Age & Kindergarten Cutoff Calculator](https://chronoagecalc.online/school-age.html): Grade placement verification based on state cutoff benchmarks (e.g., September 1st, October 1st).

## Calculation Standards & Formats

- **Clinical Semicolon Notation:** `Years;Months;Days` (e.g., `8;5;14` indicates 8 years, 5 months, 14 days).
- **Gregorian Calendar Borrowing Rule:** Precise date borrowing accounting for specific calendar days in preceding months (28/29, 30, or 31 days).
- **Gestational Correction:** `Adjusted Age = Chronological Age - (40 - Gestational Weeks)`.

## Policies & Compliance

- [About Us](https://chronoagecalc.online/about.html): Clinical methodology, team overview, and performance architecture.
- [Privacy Policy](https://chronoagecalc.online/privacy.html): Strict zero-logging, client-side only data processing guarantee.
- [Terms of Service](https://chronoagecalc.online/terms.html): Educational & testing reference disclaimers.
- [Contact Support](https://chronoagecalc.online/contact.html): Evaluator inquiries and feedback.