计算工具
年龄计算器
免费年龄计算器。从任何出生日期开始，精确计算您的年龄，包括年、月、日、小时甚至秒。可选择与自定义日期进行比较。
Runs in your browser
编辑注
Understanding · Subtracting two dates is harder than it looks.
本深度章节目前仅有英文版本。上方的转换工具支持您的语言;长篇说明文章尚未翻译。
常见问题
Quick answers.
›How is age calculated?
We compute the difference between today (or your chosen date) and the date of birth, accounting for leap years and varying month lengths.
›Why does my age in days seem off by 1?
Edge cases around midnight and the exact moment you were born can shift the result by a day. We use UTC midnight for both dates.
›Can I calculate age on a future date?
Yes — pick any date for the 'as of' field. Useful for figuring out 'how old will I be on my anniversary'.
›What's the oldest verified age?
Jeanne Calment, 122 years 164 days (1875-1997). For perspective, that's about 44,724 days.
›Is the calculator free?
Yes — free, no signup, runs in your browser. Birth dates never leave your device.
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