📏 毫米 ↔ 密耳Millimetre to Mil (thou)
毫米与密耳互算（1 mm = 39.3700787402 mil）。本地换算，附常用相关单位。Convert millimetre and mil (thou) (1 mm = 39.3700787402 mil). 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
「毫米 ↔ 密耳」是什么？What is the Millimetre to Mil (thou) tool?
毫米与密耳互算（1 mm = 39.3700787402 mil）。本地换算，附常用相关单位。Convert millimetre and mil (thou) (1 mm = 39.3700787402 mil). Runs locally with related units.
如何使用「毫米 ↔ 密耳」？How do I use the Millimetre to Mil (thou) tool?
在「毫米 ↔ 密耳」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 Millimetre to Mil (thou) and choose the source unit; the table shows the value in every other unit at once, ready to copy.
1 毫米等于多少密耳？How many mil (thou) in 1 millimetre?
1 mm = 39.3700787402 mil（按国际定义系数）。1 mm = 39.3700787402 mil (international definition).
如何把毫米换算成密耳？How do I convert millimetre to mil (thou)?
结果 = 数值 × 39.3700787402。例如 1 mm = 39.3700787402 mil。result = value × 39.3700787402. Example: 1 mm = 39.3700787402 mil.
毫米/密耳属于哪类单位？What kind of units are millimetre/mil (thou)?
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?
「毫米 ↔ 密耳」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 Millimetre to Mil (thou) uses factors defined by the SI or other recognised standards and shows about 10 significant digits.
「毫米 ↔ 密耳」免费吗？需要注册吗？Is the Millimetre to Mil (thou) free? Do I need an account?
「毫米 ↔ 密耳」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 Millimetre to Mil (thou) is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.