Age calculator
Find an exact age in years, months and days, the total days lived, and the days until the next birthday.
🔒 Everything runs in your browser. Nothing you choose or type is uploaded. How to verify
How to use it
- Enter the date of birth.
- Leave the second date as today, or pick another date.
- Read the result, which updates as you type.
Handy for
Finding an exact age for forms, birthdays, eligibility checks and anniversaries.
Good to know
People born on 29 February have the next-birthday figure counted to 1 March in years that are not leap years.
Privacy: where the work happens
Everything you enter or choose is processed by JavaScript in your browser and never sent anywhere. Only the page code, and any library this tool needs, is downloaded from cdnjs or jsDelivr.
Questions
Can I calculate age on a past date?
Yes. Change the second date to any date after the birth date.
How are months counted?
Whole calendar months are counted first, and the leftover days are shown separately.