🌾 费丹 ↔ 斯特雷马Feddan to Stremma
费丹与斯特雷马互算（1 feddan = 4.2 stremma）。本地换算，附常用相关单位。Convert feddan and stremma (1 feddan = 4.2 stremma). 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
「费丹 ↔ 斯特雷马」是什么？What is the Feddan to Stremma tool?
费丹与斯特雷马互算（1 feddan = 4.2 stremma）。本地换算，附常用相关单位。Convert feddan and stremma (1 feddan = 4.2 stremma). Runs locally with related units.
如何使用「费丹 ↔ 斯特雷马」？How do I use the Feddan to Stremma tool?
在「费丹 ↔ 斯特雷马」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 Feddan to Stremma and choose the source unit; the table shows the value in every other unit at once, ready to copy.
1 费丹等于多少斯特雷马？How many stremma in 1 feddan?
1 feddan = 4.2 stremma（按国际定义系数）。1 feddan = 4.2 stremma (international definition).
如何把费丹换算成斯特雷马？How do I convert feddan to stremma?
结果 = 数值 × 4.2。例如 1 feddan = 4.2 stremma。result = value × 4.2. Example: 1 feddan = 4.2 stremma.
费丹/斯特雷马属于哪类单位？What kind of units are feddan/stremma?
二者同属「面积」量纲，可安全互算；也可打开「area-converter」做多单位对照。Both are area units; see also the area converter hub.
换算系数准确吗？Are the conversion factors exact?
「费丹 ↔ 斯特雷马」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 Feddan to Stremma uses factors defined by the SI or other recognised standards and shows about 10 significant digits.
「费丹 ↔ 斯特雷马」免费吗？需要注册吗？Is the Feddan to Stremma free? Do I need an account?
「费丹 ↔ 斯特雷马」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 Feddan to Stremma is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.