Chronological Age Calculator for iPhone
The age math you run between sessions, on the phone already in your hand. Years, months, and days for standardized assessments, plus corrected age for premature birth.
Free, and it does one job properly.
No account, no subscription, no trial. Built for the minute before an assessment when you need an exact age and the test manual is unforgiving about rounding.
What it does
The number your report needs
Enter a date of birth and an assessment date. The age comes back in years, months, and days, and copies as 6;3, as the long form, or as total months.
Corrected age for preemies
Switch on prematurity, enter the weeks of gestation, and corrected age appears alongside chronological age. The American Academy of Pediatrics recommends it for developmental expectations through 24 months.
The math runs on the phone
A date of birth never leaves the device. Calculations, saved recents, and the optional label are stored on the phone only.
Nothing retyped
Save a calculation with a label, like initials or a case number, and pull it back later. Share or copy a result straight into your notes.
A look at it
Questions
You enter a date of birth and an assessment date, and it returns the age in years, months, and days. The result copies in the formats a test manual expects: 6;3, the long form, or total months. It is the same math as the calculator on this site, built to be faster on a phone during a session.