Detailed Age Calculator
Calculate age down to the second — years, months, days, hours, minutes, and seconds. Useful for milestones and trivia.
Result
General calculation reads
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How to use this calculator
- Enter your date of birth.
- Optionally change the "as of" date to see how old you were on a particular day or how old you will be on a future date.
- Read the breakdown for cumulative day/hour/minute/second figures.
About this calculator
A detailed age calculator goes beyond "you are 25". It tells you the exact years/months/days, plus the cumulative count in hours, minutes, and seconds — handy for milestone birthdays, trivia, and "I have been alive for a billion seconds" curiosities (which lands at about 31.7 years).
Frequently asked
When did I cross one billion seconds alive?+
How does the calculator handle leap years for someone born on Feb 29?+
Are time zones taken into account?+
Can I find the age on a past date?+
What does "decimal years" mean?+
Will I get a different number on the actual second I was born?+
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