Age calculator

Find out exactly how old someone is — in years, months, and days — as of any date.

Date of birth

Calculate age as of

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Age as of the selected date

Total days lived—

Total weeks lived—

Total months lived—

Days until next birthday—

How this is calculated

This tool works out the calendar difference between the date of birth and the date you're comparing against, then breaks that gap down into full years, months, and remaining days — the same way you'd count age by hand.