Detailed Age Calculator
Calculate age down to the second — years, months, days, hours, minutes, and seconds. Useful for milestones and trivia.
Result
Age
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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
One billion seconds is about 31.71 years (1,000,000,000 ÷ 60 ÷ 60 ÷ 24 ÷ 365.25). To find your specific date, use date-add with your birth date and add 31 years 8 months 19 days.
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