Terms & conditions

Last updated: July 2026.

Use of the tools

ChronoAge Pro provides free chronological-age calculators for clinical and educational assessment work. You are welcome to use them in your professional practice. Please do not attempt to disrupt the site or misrepresent it as your own.

A professional aid, not a substitute for the manual

The calculations are standard and unit-tested, but you remain the professional. Rounding and age-band conventions differ between assessments, and each test's published manual is the authority. Always confirm the age band and scoring rule against your specific test's manual before recording a standard score.

Assessment names

Assessment names referenced on this site (for example WISC-V, CELF-5, PLS-5) are trademarks of their respective publishers and are used descriptively and nominatively only. ChronoAge Pro is not affiliated with, sponsored by, or endorsed by any test publisher.

No warranty

ChronoAge Pro is provided “as is”, without warranty of any kind. We work to keep the math correct, but we are not liable for any loss arising from use of the site. If you spot an error, tell us and we will fix it.

Changes

We may update these terms and the tools from time to time. Continued use of the site means you accept the current version.

Contact

Questions? See the contact page.