Chronological age in years;months.days
The format record forms actually ask for — 10;11.17, not “about 11 years”. Plus corrected age for children born preterm, nearest-month rounding where an instrument requires it, and the published age range for 43 assessments. Nothing you type leaves your browser.
For Educators & Clinicians
By Assessment
All 43 instrumentsEach page pre-selects the age format that instrument records, checks the age against the publisher's published range, and says whether corrected age applies.
WISC-V Age Calculator
6:0 – 16:11 · Pearson
CELF-5 Age Calculator
5:0 – 21:11 · Pearson
PPVT-5 Age Calculator
2:6 – 90:0 and older · Pearson
BRIGANCE Screens III Age Calculator
Birth – 6:11 · Curriculum Associates
Bayley-4 Age Calculator
16 days – 42 months · Pearson
WIAT-4 Age Calculator
4:0 – 50:11 · Pearson
Everyday Answers
Everyday & Novelty Calculators
Report-ready output
One click copies the bare years;months.days string — the thing that actually goes into the report, not a paragraph you have to edit.
Dates never leave your browser
Every calculation runs locally. No date of birth is transmitted, logged or stored — which matters when the date belongs to a student on your caseload.
Documented arithmetic
Month-end clamping, leap days and the 15-day rounding threshold are all written down in the methodology and covered by an automated test suite.