About

This site is run by Abhishek, an independent developer in India. It exists because speech therapists, psychologists, and parents still have to compute Y;M;D by hand, and because none of the ranking calculators offer a fact you can share after the number.

Results are computed in your browser from the dates you enter. Calendar mode borrows the real length of the month before Age on. Testing mode borrows 30 days per month, matching the Pearson WIAT-III support note that months have 30 days and ages are not rounded up. Leap-day birthdays count as 1 March in non-leap years. Corrected age subtracts (40 minus gestational age) weeks and is shown until chronological age 3.

Fun facts are computed from your dates. Each card has a source link. Constants come from NASA fact sheets, NOAA CO2, NASA GISTEMP, UN World Population Prospects 2024, and the papers named on the card. Estimates are labelled as about or roughly.

There is no team page, no invented clinic, and no street address. Email hello@chronologicalage.online.