Age Calculator
Calculate your exact age in years, months and days from your date of birth, plus days until your next birthday.
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How Is Exact Age Calculated?
Enter your date of birth and the tool shows your exact age in years, months and days, your total days lived, and how many days remain until your next birthday. You can also change the "as of" date to compute an age at any date — useful for forms, school enrollment cut-offs or official paperwork.
The calculation counts full calendar years and months first, then the remaining days, which is the same convention used in official documents. Everything runs in your browser.
Frequently Asked Questions
How is age in years, months and days calculated?
First the number of complete years since birth is counted, then complete months after the last birthday, then the remaining days. For example, someone born on 10 March 2000 is, on 25 July 2026, exactly 26 years, 4 months and 15 days old.
Can I calculate age at a specific date?
Yes. Change the "as of" date field to any date — past or future — and the age is computed for that day. This is handy for enrollment cut-offs and official forms.
Is my date of birth stored anywhere?
No. The calculation runs entirely in your browser with JavaScript; the dates you enter are never sent to a server.
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Age Calculator