# chronologicagecalc.com


## Pages

- [Privacy Policy](https://chronologicagecalc.com/privacy-policy-2/): What information this site collects, how it is used, and the choices you have.
- [Contact Us](https://chronologicagecalc.com/contact/): Questions, feedback or found a mistake? We read every message.
- [Editorial Policy](https://chronologicagecalc.com/editorial-policy/): How we research, write, check and update the calculators and guides on this site.
- [About Us](https://chronologicagecalc.com/about/): Free, accurate age calculators and plain-English guides for parents, teachers, therapists and anyone who needs an exact age.
- [Methodology](https://chronologicagecalc.com/methodology/): The exact methods, formulas and sources behind every calculator on this site, so you can check our results and know when to rely on them.
- [Types of Age](https://chronologicagecalc.com/types-of-age/): The main types of age explained, from chronological and biological age to bone, mental and social age: what each one means, how it is measured, and who uses it.
- [Chronological Age in Psychology](https://chronologicagecalc.com/chronological-age-in-psychology/): What chronological age means in psychology, how psychologists record and use it in testing, development and research, and how it compares with mental, developmental and psychological age.
- [Age Calculators](https://chronologicagecalc.com/age-calculators/): Find out exactly how old you are today with our free online age calculator, then explore every specialist age tool on the site, from baby ages to biological age.
- [Baby & Child Age Calculator](https://chronologicagecalc.com/child-age-calculator/): Find your baby's or child's exact age in weeks, months and years from their date of birth, plus their developmental stage and corrected age if they were born early.
- [Chronological Age Examples](https://chronologicagecalc.com/chronological-age-examples/): Work through eight chronological age examples, from easy to tricky, and check your answers instantly.
- [Chronological vs Developmental Age](https://chronologicagecalc.com/chronological-vs-developmental-age/): How a child's real age and their developmental age are measured, why they can differ, what a gap means, and how families, teachers and therapists use both.
- [Developmental Age Calculator](https://chronologicagecalc.com/developmental-age-calculator/): Enter a child's dates and the age-equivalent scores from an assessment to see their developmental age in each area and the percent delay compared with chronological age.
- [Mental vs Chronological Age](https://chronologicagecalc.com/chronological-vs-mental-age/): What mental age and chronological age mean, how psychologists compared them to create the first IQ scores, worked examples, and how the popular idea of "mental age" differs from the scientific one.
- [Speech Therapy Age Calculator](https://chronologicagecalc.com/chronological-age-calculator-speech-therapy/): A free chronological age calculator for speech-language pathologists.
- [Age Rounding Rules for Testing](https://chronologicagecalc.com/age-rounding-rules-for-testing/): When to round chronological age up, when to drop the days and when to use the exact age, with examples and a quick decision guide for evaluators.
- [Chronological Age for Testing](https://chronologicagecalc.com/chronological-age-for-testing/): Everything clinicians and teachers need to calculate chronological age for testing: the method, rounding, corrected age, test age ranges and free calculators for Pearson, Super Duper and Brigance users.
- [Biological Age Calculator](https://chronologicagecalc.com/biological-age-calculator/): Estimate your biological age from nine common blood test results using the published PhenoAge formula.
- [Mental Age Calculator](https://chronologicagecalc.com/mental-age-calculator/): Convert between IQ, mental age and chronological age with the classic ratio IQ formula.
- [School Age Calculator](https://chronologicagecalc.com/school-age-calculator/): Enter your child's birthday and your state or district's cut-off date to see when they can start kindergarten, their age on the first day, and what grade they should be in this school year.
- [Age Difference Calculator](https://chronologicagecalc.com/age-difference-calculator/): Find the exact age gap between two people in years, months and days.
- [Brigance Age Calculator](https://chronologicagecalc.com/brigance-age-calculator/): Find a child's exact age on the screening date before you give a Brigance screen.
- [Super Duper Age Calculator Alternative](https://chronologicagecalc.com/super-duper-age-calculator-alternative/): A free chronological age calculator for testing, made for SLPs who use the Super Duper age calculator.
- [Age in Months Calculator](https://chronologicagecalc.com/age-in-months-calculator/): How many months old is your child, or how many months old are you?
- [Chronological vs Biological Age](https://chronologicagecalc.com/chronological-vs-biological-age/): Your chronological age is how long you have lived. Your biological age is how old your body seems.
- [What Is Chronological Age](https://chronologicagecalc.com/what-is-chronological-age/): Home › Learn › What Is Chronological Age?
- [Test Age Ranges](https://chronologicagecalc.com/test-age-ranges/): A quick chart of the age ranges for 19 common psychological, speech-language and developmental tests, plus a finder that shows which tests fit your client's age.
- [How to Calculate Chronological Age](https://chronologicagecalc.com/how-to-calculate-chronological-age/): Learn how to calculate chronological age by hand from a birth date to the current date or a test date, with two methods, worked examples, practice questions and a ready-made Excel formula.
- [Pearson Age Calculator Alternative](https://chronologicagecalc.com/pearson-age-calculator-alternative/): A free chronological age calculator for testing that works like the Pearson age calculator, with Y;M;D output, optional rounding, corrected age and step-by-step working you can paste into your report.
- [Corrected Age Calculator](https://chronologicagecalc.com/corrected-age-calculator/): Find a premature baby's corrected (adjusted) age in seconds.
- [Chronological Age Calculator](https://chronologicagecalc.com/): Enter a date of birth and a test date to get the exact chronological age in years, months and days.


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