🎂 虚岁与周岁计算器Chinese Nominal vs Actual Age Calculator
按公历生日计算国际周岁，以及按农历春节换岁的传统虚岁（出生即 1 岁，每过春节 +1）。International age from a Gregorian birthday, plus traditional Chinese nominal age (1 at birth, +1 each Lunar New Year).
使用说明与常见问题How-to & FAQ
「虚岁与周岁计算器」是什么？What is the Chinese Nominal vs Actual Age Calculator tool?
按公历生日计算国际周岁，以及按农历春节换岁的传统虚岁（出生即 1 岁，每过春节 +1）。International age from a Gregorian birthday, plus traditional Chinese nominal age (1 at birth, +1 each Lunar New Year).
如何使用「虚岁与周岁计算器」？How do I use the Chinese Nominal vs Actual Age Calculator tool?
在「虚岁与周岁计算器」中，填写「出生日期」、「参考日期（空白=今天）」等参数，结果会随输入实时计算并显示在下方。In the Chinese Nominal vs Actual Age Calculator: Fill in "Birth date", "Reference (blank=today)"; results are recalculated instantly as you type.
虚岁怎么算？How is nominal age counted?
出生即 1 岁，之后每过一个农历春节（正月初一）全体加一岁，与公历生日无关。公式≈参考日农历年 − 出生农历年 + 1。You are 1 at birth and gain a year at each Chinese New Year (1st of month 1), not on the Gregorian birthday. Roughly: reference lunar year − birth lunar year + 1.
法律用哪个？Which age is legal?
中国大陆法律与行政一般用周岁（满岁）。虚岁多见于传统习俗、生肖与口语。Mainland China law and administration generally use the international age. Nominal age appears in custom, zodiac talk and casual speech.
本结果准吗？Is this accurate?
不准，也不打算准。本工具仅供娱乐或传统文化参考，没有任何科学或命理保证，请勿据此做人生、婚恋或财务决定。No, and it is not meant to be. For entertainment or cultural reference only — not scientific or divinatory advice. Do not base life, relationship or money decisions on it.
数据会上传吗？Is my data uploaded?
不会。所有计算都在你的浏览器本地完成，本站不保存你的生日或姓名。No. Everything runs locally in your browser; this site does not store your birthday or name.
「虚岁与周岁计算器」免费吗？需要注册吗？Is the Chinese Nominal vs Actual Age Calculator free? Do I need an account?
「虚岁与周岁计算器」完全免费，无需注册或安装，打开网页即可使用，手机和电脑都能用；输入的内容只在你的浏览器本地处理。The Chinese Nominal vs Actual Age Calculator is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.