Enter a date of birth to get an exact age, total days lived and a countdown to the next birthday.
Two dates, instant answer.
Pick the date of birth in the first field.
Optionally change the "age at" date — it defaults to today.
Read the exact age in years, months and days instantly.
Check the total days and the next-birthday countdown below.
Built for speed, privacy and reliability — on any device.
Real calendar math — leap years and month lengths are handled correctly.
Not just today: calculate age as of a wedding, exam, match or any other date.
See total days lived and exactly how many days until the next birthday.
Dates are calculated locally — nothing is stored or sent anywhere.
No account, no limits.
Calendar math: full years first, then remaining months, then remaining days — the same way humans count age, with leap years handled.
Yes — change the "age at" date to any date. It must be after the date of birth.
No. The calculation runs entirely in your browser and nothing is saved or sent.
Yes — 29 February birthdays are counted on 1 March in non-leap years for the next-birthday countdown.
The tool works in all modern browsers including Google Chrome, Mozilla Firefox, Microsoft Edge, Safari and Opera. We recommend keeping your browser up to date for the best experience.
Step-by-step guide with screenshots and tips.
Read guide →Step-by-step guide with screenshots and tips.
Read guide →Step-by-step guide with screenshots and tips.
Read guide →Step-by-step guide with screenshots and tips.
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