How is exact age calculated?

We count full years, then full months, then remaining days between your birth date and the chosen date, accounting for different month lengths and leap years.

Can I calculate age on a specific date?

Yes. Change the "as of" date to any day to see how old you were or will be on that date.

Does it handle leap year birthdays?

Yes. For 29 February birthdays, the next birthday in non-leap years is treated as 1 March.

Is my date of birth stored?

No. All calculations run in your browser and nothing is saved or uploaded.

Can I use it for official documents?

It's accurate for everyday use, but always confirm age with the official rules of the organisation requesting it.

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Age Calculator— Find your exact age in years, months and days.

Date of birth

Age as of (optional)

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How to Use the Age Calculator

Pick your date of birth using the date field. Optionally change the "as of" date to calculate your age on any past or future day. Your exact age, total time lived and next birthday countdown appear instantly. Nothing is sent to a server, so your birth date stays private.

Frequently Asked Questions

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