从出生日期计算精确年龄，支持计算到今天或任意日期的年龄。结果包含年、月、日、周和总天数。纯客户端处理，保护隐私。
本年龄计算器精确计算两个日期之间的时间差，以年、月、日的形式展示结果。它考虑了不同月份的天数差异和闰年。所有计算都在您的浏览器中进行 — 数据不会发送到任何服务器。您可以用它来计算您的精确年龄、年龄差异，或规划未来的里程碑。
Our calculator fully accounts for leap years. It recognizes that February has 29 days in a leap year instead of 28, and correctly calculates the exact number of days, months, and years between any two dates, including across leap year boundaries.
Yes! Simply enter your birth date and then enter any future date in the "Calculate Age On" field. The tool will show you exactly how old you will be on that date, including your zodiac sign and life milestones at that time.
The age in years, months, and days shows the human-readable breakdown (e.g., 25 years, 3 months, 12 days). Total days is the exact count of all days between the two dates. Total hours is the cumulative hours lived, which is fun trivia!
Absolutely. All calculations happen entirely in your browser using JavaScript. Your birth date and any other data are never sent to a server, stored in a database, or shared with anyone.
The Western zodiac is calculated based on the standard astrological calendar dates. The Chinese zodiac is determined by the lunar year of your birth. Both are calculated using established astrological systems and are accurate for most use cases.
The calculator will show an error message: "Birth date cannot be in the future." This is a safety check to prevent invalid calculations. Please enter a date that has already occurred.
Yes, you can enter any valid birth date to calculate the age of any person, pet, or even the age of an event. Simply input their birth date and optionally a target date to see their exact age at that time.
Life milestones (18, 30, 50, 65, 100) are common benchmarks people are curious about. The calculator shows whether you have passed each milestone and the exact date it will occur (or did occur), helping with planning and reflection.