精确计算年龄 — 到年、月、日、小时、秒
Calculate your exact age — down to years, months, days, hours, and seconds
Enter your date of birth and a reference date. The calculator shows your age in years, months, and days, plus total days lived and hours elapsed.输入出生日期和参考日期，计算器会显示年/月/日龄，以及活了多少天和小时。
The calculator automatically shows a countdown to your next birthday when you enter your date of birth.输入出生日期后，计算器会自动显示距离下次生日的倒计时。
Enter the older person's birth date as 'Date of Birth' and the younger person's birth date as 'Age at Date'. The result shows the gap.把年长者的生日作为"出生日期"，年幼者的生日作为"计算到日期"，结果就是年龄差。
Yes. Total days and hours are calculated using exact JavaScript Date objects, which correctly handle leap years.是的。总天数和小时数使用 JavaScript Date 对象精确计算，自动处理闰年。