Age Calculator
Enter a date of birth to get your exact age down to the day — plus your next birthday, days lived and a few fun extras.
Your age
This tool runs entirely in your browser. Nothing you add is uploaded to any server.
Last checked: · Made by Fingertip Workshop
How to use
- 1
Pick a date of birth. “Age on” defaults to today.
- 2
See age in years, months and days instantly.
- 3
Need age on a specific date (an exam, a start date)? Change “Age on”.
How exact age is calculated
We count full years since birth, then full months since the last birthday, then remaining days — the same way age is calculated for legal and official purposes in most countries.
Fun extras
You'll also see your star sign, the Chinese zodiac animal for your birth year (traditionally it changes at Lunar New Year, so early-year birthdays may belong to the previous animal), the weekday you were born, and how many days and weeks you've lived.
FAQ
What about 29 February birthdays?
In non-leap years, the age increases on 1 March.
Is my birth date stored?
No. It's calculated in your browser and never saved.
Can I calculate age at a past date?
Yes, set “Age on” to any date after the birth date.