Age Calculator
Find your exact age in years, months and days, plus a few fun extra facts.
How to use the age calculator
Enter your date of birth. By default your age is calculated as of today, but you can change the second date to see your age (or someone else's) on any specific day — handy for figuring out age at a past or future event. You'll get your exact age in years, months and days, your total age in days, and a countdown to your next birthday.
Frequently asked questions
How is the age in years/months/days calculated?
It counts the full years, then full months, then remaining days between your birth date and the "as of" date — the same way you'd count age by hand on a calendar.
Does it account for leap years?
Yes — all date math uses actual calendar dates, so leap years are automatically handled correctly.
Is anything I enter here saved or tracked?
No — everything happens locally in your browser. Nothing is uploaded, logged, or stored.