Age Calculator — How Old Am I Exactly?

This age calculator works out your exact chronological age — years, months and days — from your date of birth, entirely in your browser. Your birth date is never uploaded or stored anywhere, there is no sign-up, and once the page has loaded it keeps working even offline. Alongside the headline age you get your total days lived, weeks, approximate hours, and a live countdown to your next birthday.

The maths is calendar-aware rather than a crude divide-by-365. It subtracts years, months and days as calendar components, borrowing days from the actual length of the previous month when needed — so 31-day months, 30-day months, February and leap years are all handled correctly. That is why the answer here matches the way ages are counted on official documents, rather than drifting by a day or two the way "days ÷ 365.25" shortcuts can.

The optional "age on date" field is the part most calculators skip: instead of your age today, you can find your age on any past or future date. That is exactly what you need for school admission cut-offs, exam or job eligibility rules that say "age as on" a specific date, or simply to know how old you were when something happened. When you are done, one tap copies a shareable stat like "I am 12,345 days old" to your clipboard.