Age Calculator

Find an exact age in years, months, and days from any birth date.

Date of birth

Age at date (defaults to today)

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Years

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Months

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Days

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Total days

How to use

Enter the date of birth.
Optionally change the "age at" date (defaults to today).
See the exact age in years, months, and days, plus total days.

Frequently asked questions

How does the age calculator handle leap years?

It counts real calendar days, so February 29 and varying month lengths are handled automatically.

Can I calculate age on a future or past date?

Yes. Change the second date to any date to find the age at that moment.

🔒 This tool runs entirely in your browser. Nothing you enter is uploaded, logged, or stored.

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