"How old am I exactly?" sounds simple until you need it in years, months and days for a visa form, an insurance quote, a school admission or a pension check. This free age calculator gives you the precise answer from a date of birth. You'll see your age in completed years, months and days; the total number of months, weeks and days you've been alive; the day of the week you were born; and a countdown to your next birthday. By default it calculates your age as of today, but you can set any other "age on" date, which is useful for forms that ask how old someone will be on a cut-off date such as September 1 for school entry, or for working out someone's age on a historical date. The calculator handles the awkward cases properly: leap years, months of different lengths, and people born on February 29 (we treat their birthday as March 1 in non-leap years, which is how many countries handle it legally, and say so). Dates are worked out in your own time zone, in your browser, and nothing is saved or sent anywhere.
Calculate exact age
How to use the age calculator
- Enter the date of birth.
- Leave "age on" as today, or change it to a cut-off date.
- Read the exact age and extra stats. Everything updates instantly.
How exact age is worked out
We count whole years first, then whole months, then the remaining days, borrowing days from the previous month when needed. This matches how most official forms define age.
FAQ
How are leap-year birthdays handled?
For people born on February 29, we count the birthday as March 1 in non-leap years. Some places use February 28 instead, so check if it matters legally.
Can I find someone’s age on a past or future date?
Yes. Change the “Age on this date” field.
Why might another calculator differ by a day?
Some tools count the end date as a full day, or use UTC rather than your local time. We use your local calendar dates and don’t count the end date.
Is my birth date stored?
No. Everything is calculated in your browser.
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