Age calculator
Exact age in years, months and days, and how long until the next birthday.
Result
Loading today's date…
- Age
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- In months
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- In weeks
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- In days
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- In hours
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- Next birthday ()
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- Born on a
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What this calculation assumes
- Age is counted the international way: it goes up by one on each birthday, and you are 0 at birth.
- When a month is shorter than the birth day (for example the 31st), the anniversary falls on the last day of that month.
- Someone born on February 29 turns a year older on February 28 in common years.
How age is counted
Your age is the number of birthdays you have had. The calculator counts whole months from your date of birth while the date stays on or before the day you choose, turns twelve months into a year, and then counts the remaining days.
When the birth day does not exist in a month (the 31st in April, or February 29 in a common year) the anniversary falls on that month's last day. That is why someone born on February 29 is counted a year older on February 28 in common years.
Questions people ask
How do I work out my age on a past or future date?
Change the Age on date. Leave it as today for your current age.
How many days old am I?
The tape shows your age in days, weeks, months and hours as well as years, months and days.
Does this use Korean or East Asian age?
No. It uses the international system, where you are 0 at birth and gain a year on each birthday.