📆 周与年换算Weeks to Years Converter

使用说明与常见问题How-to & FAQ

「周与年换算」是什么？What is the Weeks to Years Converter tool?

把周数换算成年（公历平均年 = 52.1775 周），同时给出按 52 周一年、按月和按天的换算；也可以把年换回周。Convert weeks to years (an average Gregorian year is 52.1775 weeks), along with 52-week years, months and days — or convert years back to weeks.

如何使用「周与年换算」？How do I use the Weeks to Years Converter tool?

在「周与年换算」中，填写「方向」、「周」、「年」等参数，结果会随输入实时计算并显示在下方。In the Weeks to Years Converter: Fill in "Direction", "Weeks", "Years"; results are recalculated instantly as you type.

一年有多少周？How many weeks are in a year?

平年 365 天 = 52 周零 1 天（52.142857 周），闰年 366 天 = 52 周零 2 天（52.285714 周）。按公历 400 年周期的平均年长 365.2425 天计算，一年 = 52.1775 周，本工具默认用这个平均值。A 365-day year is 52 weeks and 1 day (52.142857 weeks) and a 366-day leap year 52 weeks and 2 days (52.285714 weeks). Using the average Gregorian year of 365.2425 days over the 400-year cycle, a year is 52.1775 weeks — the value this tool uses.

「按每年 52 周」是什么意思？What are 52-week years?

有些场合（如财务周历、项目排期）把一年简单当作 52 周 = 364 天，这一行按此口径给出，便于对照。Some contexts, such as 52-week fiscal calendars or project plans, treat a year as exactly 52 weeks = 364 days; this row uses that convention for comparison.

月数怎么算？How are months worked out?

按公历平均月长 30.436875 天（365.2425 ÷ 12）换算，所以 26 周（182 天）约为 5.98 个月。Using the average Gregorian month of 30.436875 days (365.2425 ÷ 12), so 26 weeks (182 days) is about 5.98 months.

换算系数准确吗？Are the conversion factors exact?

「周与年换算」采用国际单位制（SI）或公认标准中的定义值作为换算系数，结果保留约 10 位有效数字。The Weeks to Years Converter uses factors defined by the SI or other recognised standards and shows about 10 significant digits.

「周与年换算」免费吗？需要注册吗？Is the Weeks to Years Converter free? Do I need an account?

「周与年换算」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 Weeks to Years Converter is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.