Enter a date of birth and get an exact age: years, months and days following calendar periods, plus total days, total weeks, the weekday you were born on, and a countdown to your next birthday.
The breakdown borrows days from the month before the reference date, so "3 months" always means three full calendar months rather than 90 days. A Feb 29 birthday counts Feb 28 in common years.
Frequently asked questions
Why is my age different in months vs 90-day blocks?
Ages follow the calendar: a month is however long that month is (28–31 days), not a fixed 30 or 90 days.
What happens on my birthday itself?
The countdown switches to next year's birthday, so it shows 365 or 366 days, never 0.
Which calendar does it use?
The Gregorian calendar with no time zones — the standard for legal ages worldwide.
中文说明
输入出生日期即得精确年龄：按日历周期拆分的年、月、日，以及已活总天数、总周数、出生当天是星期几和下一个生日的倒计时。
拆分算法按"基准日前一个月"借位，因此"3 个月"一定是三个完整日历月而非 90 天。2 月 29 日出生者平年按 2 月 28 日计算。
常见问题
为什么按月算和按 90 天算的年龄不一样？
年龄跟日历走：一个月是 28 到 31 天不等，而不是固定 30 天或 90 天。
生日当天会显示什么？
倒计时切换到下一个生日，显示 365 或 366 天，不会是 0。
用的是哪种历法？
公历（格里高利历），不涉及时区——这也是世界各国法定年龄的通用标准。