Chronological Age Calculator for Testing: Pearson, Brigance, Cornell, and More

Why Exact Age Matters for Assessment Scoring

Norm tables, age-equivalent scores, and standard scores are based on "age as of [date]." A difference of a few days can put a child in another band and change how results are interpreted. That's why manuals ask for years, months, and days.

Brigance screening and inventory tools use chronological age for scoring and age-equivalent results. The manual typically wants age in years, months, and days before you score. What people mean by a "Brigance calculator" or "Brigance chronological age calculator" is really: get the precise age first, then fill in the form. Brigance scoring depends on that same input—exact chronological age as of the assessment date.

Pearson assessments (e.g. CELF, WPPSI, and other clinical and educational tests) require chronological age as of the assessment date for table lookups and scoring. A "Pearson age calculator" or "Pearson chronological age calculator" is the same idea: calculate the exact age, then use it with the manual. One calculator gives you what both Brigance and Pearson need.

School and District Use: Cornell, LAUSD, and Age Cutoffs

Schools and districts often use age cutoffs or bands for enrollment, placement, or referrals. When people search for a "Cornell age calculator" or "age calculator Cornell," they're usually looking for the same thing: exact age from date of birth as of a given date (e.g. cutoff or evaluation day). Large districts like LAUSD may have forms or systems that require age as of a specific date—so an "age calculator LAUSD" need is again just birth date plus that date, yielding years, months, and days.

In practice: enter the child's birth date and the cutoff or assessment date into a chronological age calculator. Copy the result into the district form or system. One tool covers Cornell-style and LAUSD-style requirements.

Other Common Assessments: AGS, ASQ, Super Duper

AGS assessments also need chronological age for scoring. An "AGS age calculator" need is the same as for Pearson or Brigance: get the exact age, then use it with the protocol or record form.

The Ages and Stages Questionnaire (ASQ) often asks for age at the time of the questionnaire. An "ASQ calculator" or "ages and stages questionnaire calculator" is really just: birth date plus questionnaire date → chronological age in years, months, and days. The same calculator works.

Super Duper publications and many speech or language materials reference chronological age to choose the right level or interpret results. Searches like "chronological age calculator Super Duper" or "super duper chronological age calculator" come from that—get the exact age, then use their materials. One tool covers testing, scoring, and forms across all these names.

How to Use One Calculator for All of Them

To get test age (chronological age as of the test or assessment date):

1. Open our free chronological age calculator.
2. Enter date of birth and the test or assessment date (or cutoff date, if that's what the form needs).
3. Use the result—years, months, days, and total days—and copy it into your record form or system.

If the protocol asks for adjusted age (e.g. for prematurity), use the due date instead of birth date as the start date in the same calculator. For more on that and other use cases, see our post on how to calculate chronological age.

Bottom Line

Pearson, Brigance, Cornell, AGS, ASQ, LAUSD, and Super Duper all expect the same thing when they ask for exact age: chronological age in years, months, and days as of a specific date. One free chronological age calculator for testing gives you that for every one of them—no need to hunt for a different tool per assessment. Enter the two dates, copy the result, and move on.