About this calculator
How old are you exactly, today or on any date? This age calculator gives you the precise answer in years, months and days, and also expresses your age as a total number of months, weeks and days — handy for milestones, forms, or simple curiosity.
How it works
The calculator subtracts your date of birth from the comparison date (today by default). It works out full years first, then the remaining months and days, borrowing from the previous month where needed so the result is always accurate. Leave the second date blank to use today.
Frequently asked questions
How do I find my exact age?
Enter your date of birth. The calculator subtracts it from today’s date and breaks the result into years, months and days.
Can I find my age on a future or past date?
Yes — fill in the "Age at date" field with any date to see how old you were, or will be, then.
Does it account for leap years?
Yes. It uses real calendar months and leap years, so the day count is exact.
Is anything stored?
No. The calculation runs entirely in your browser.