✨ 光毫秒 ↔ 光幺秒Light-millisecond to Light-yoctosecond
光毫秒与光幺秒互算（1 light-ms = 1e+21 light-ys）。本地换算，附常用相关单位。Convert light-millisecond and light-yoctosecond (1 light-ms = 1e+21 light-ys). 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
「光毫秒 ↔ 光幺秒」是什么？What is the Light-millisecond to Light-yoctosecond tool?
光毫秒与光幺秒互算（1 light-ms = 1e+21 light-ys）。本地换算，附常用相关单位。Convert light-millisecond and light-yoctosecond (1 light-ms = 1e+21 light-ys). Runs locally with related units.
如何使用「光毫秒 ↔ 光幺秒」？How do I use the Light-millisecond to Light-yoctosecond tool?
在「光毫秒 ↔ 光幺秒」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 Light-millisecond to Light-yoctosecond and choose the source unit; the table shows the value in every other unit at once, ready to copy.
1 光毫秒等于多少光幺秒？How many light-yoctosecond in 1 light-millisecond?
1 light-ms = 1e+21 light-ys（按国际定义系数）。1 light-ms = 1e+21 light-ys (international definition).
如何把光毫秒换算成光幺秒？How do I convert light-millisecond to light-yoctosecond?
结果 = 数值 × 1e+21。例如 1e-21 light-ms = 1 light-ys。result = value × 1e+21. Example: 1e-21 light-ms = 1 light-ys.
光毫秒/光幺秒属于哪类单位？What kind of units are light-millisecond/light-yoctosecond?
二者同属「长度」量纲，可安全互算；也可打开「length-converter」做多单位对照。Both are length units; see also the length converter hub.
换算系数准确吗？Are the conversion factors exact?
「光毫秒 ↔ 光幺秒」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 Light-millisecond to Light-yoctosecond uses factors defined by the SI or other recognised standards and shows about 10 significant digits.
「光毫秒 ↔ 光幺秒」免费吗？需要注册吗？Is the Light-millisecond to Light-yoctosecond free? Do I need an account?
「光毫秒 ↔ 光幺秒」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 Light-millisecond to Light-yoctosecond is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.