Chronological Age Calculator

About

Chronological Age Calculator is a free online tool for calculating a person's exact calendar age from their date of birth. Instead of returning only completed years, it calculates age in years, months, and days while accounting for calendar differences such as varying month lengths and leap years. The main calculator determines a user's chronological age as of today and includes a live counter showing hours, minutes, and seconds. The website also provides related tools for calculating age on a specific date, age differences between two people, total days alive, and age in completed months. A separate testing-date calculator can calculate chronological age from a birth date to an assessment or test date. The site also displays related birth information such as birthstones, zodiac signs, and the number of days until the next birthday. Birth-date calculations are processed locally in the user's browser.

Problem & solution

Who it's for

People who need an exact age for personal, school, assessment, or record purposes.

• Chronological Age Calculator: A Simple Way to Calculate Your Exact Age

  Free chronological age calculator that calculates your exact age in years, months, and days from your date of birth. Fast, private, accurate, and no signup required.

  NxGn Tools·Sep 5, 2026

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