Input
Birth date: 1995-06-15
Output
Years, months, and days as of today
Date & Time
Age Calculator — Years and Birthday Countdown
Calculate exact age in years, months, and days from a birth date, plus total days lived and days until the next birthday. Optionally set a custom as-of date; everything runs locally in the browser.
AgeDateBirthday
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日期时间
年龄计算器
计算结果
周岁：-
详细：-
总天数：-
下次生日：-
请选择出生日期
已复制
Use cases
- Check someone’s exact age in years
- Count days until the next birthday
- Verify age as of a specific date
How to use
- Choose a birth date
- Optionally set an as-of date
- Review years, detail breakdown, total days, and next birthday
Example input and output
FAQ
Can I customize the as-of date?
Yes. It defaults to today, but you can set any end date before calculating.
Does it use lunar calendars?
No. Age and day counts use the Gregorian calendar only.
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