Question 1

How do I calculate test age correctly?

Accepted Answer

Use birth date and the actual testing date, then record the Y-M-D output for score interpretation and reporting.

Question 2

What is the most common test-age mistake?

Accepted Answer

Using scheduling date instead of real testing date creates avoidable age-boundary errors.

Question 3

Can this be used across different assessments?

Accepted Answer

Yes. The chronological age method is consistent for WISC, CELF, PPVT, and similar workflows.

Test Age Calculator