If you score norm-referenced language and articulation tests, you need a child's exact age in years;months;days — computed the way the test publisher expects. This calculator does exactly that, free.
Why SLPs need exact chronological age
Norm-referenced assessments sort children into age bands that are often only three to six months wide. A child's standard score, percentile, and eligibility decision all depend on landing in the right band — and that depends on an exact age, down to the day, computed with the publisher's borrow-30 method (every month treated as 30 days).
A single day off can move a child into the wrong band and change the score. Doing the borrow math by hand between back-to-back evaluations is exactly where errors creep in.
Tests this matters for
- CELF-5 — Clinical Evaluation of Language Fundamentals
- PLS-5 — Preschool Language Scales
- CASL-2 — Comprehensive Assessment of Spoken Language
- GFTA-3 — Goldman-Fristoe Test of Articulation
- PPVT-5 / EVT-3, and any Q-global–scored instrument
What this tool gives you
- The exact years;months;days in the borrow-30 format Q-global and the manuals expect
- A settable test date for evaluations scored after the fact
- Works offline — no connection needed during an evaluation
- Deterministic, unit-tested math — the same answer every time, not an AI guess
- 100% private: nothing you enter leaves your device or is tracked
Wondering why you can't just ask ChatGPT or use a generic calculator? Here's why that gives the wrong number for assessment scoring →
Built for your assessments
- Speech-Language Pathologists
- School Psychologists
- Pediatric OTs & PTs
- Early Intervention
Get the exact answer in seconds — free.
Free iOS / Mac app, or use it right in your browser. No ads, no accounts, no subscription.
