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Age Calculator

Date Time

Age Calculator

Calculate age in years, months, and days from a birth date.

Birth date

As of

Result

—

How it works

Age is the elapsed calendar time from birth to a chosen as-of date, expressed in years, months, and days.

Count full years, then remaining months and days.

\[ \mathrm{age} = t_{\mathrm{as\text{-}of}} - t_{\mathrm{birth}} \]

Reference → Tutorial: How to Calculate Age from Dates →

Sources

https://en.wikipedia.org/wiki/Age

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