⌛ 年（365 天） ↔ 秒Year (365 d) to Second
年（365 天）与秒互算（1 yr = 31536000 s）。本地换算，附常用相关单位。Convert year (365 d) and second (1 yr = 31536000 s). Runs locally with related units.
点击任意一行可复制该结果；小于 0.0001 或不小于 10¹⁵ 的数值用 × 10ⁿ 科学计数法显示Click any row to copy that result. Values below 0.0001 or at least 10¹⁵ are shown in × 10ⁿ notation
使用说明与常见问题How-to & FAQ
「年（365 天） ↔ 秒」是什么？What is the Year (365 d) to Second tool?
年（365 天）与秒互算（1 yr = 31536000 s）。本地换算，附常用相关单位。Convert year (365 d) and second (1 yr = 31536000 s). Runs locally with related units.
如何使用「年（365 天） ↔ 秒」？How do I use the Year (365 d) to Second tool?
在「年（365 天） ↔ 秒」中输入数值并选择原单位，表格会同时列出换算到所有其他单位的结果，可一键复制。Enter a value in the Year (365 d) to Second and choose the source unit; the table shows the value in every other unit at once, ready to copy.
1 年（365 天）等于多少秒？How many seconds in 1 year (365 d)?
1 yr = 31536000 s（按国际定义系数）。1 yr = 31536000 s (international definition).
如何把年（365 天）换算成秒？How do I convert year (365 d) to second?
结果 = 数值 × 31536000。例如 1 yr = 31536000 s。result = value × 31536000. Example: 1 yr = 31536000 s.
年（365 天）/秒属于哪类单位？What kind of units are year (365 d)/second?
二者同属「时间」量纲，可安全互算；也可打开「time-unit-converter」做多单位对照。Both are time units; see also the time unit converter hub.
换算系数准确吗？Are the conversion factors exact?
「年（365 天） ↔ 秒」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 Year (365 d) to Second uses factors defined by the SI or other recognised standards and shows about 10 significant digits.
「年（365 天） ↔ 秒」免费吗？需要注册吗？Is the Year (365 d) to Second free? Do I need an account?
「年（365 天） ↔ 秒」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 Year (365 d) to Second is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.