🟩 圆英寸 ↔ 杜纳姆Circular inch to Dunam
圆英寸与杜纳姆互算（1 circ in = 5.06707479097e-07 dunam）。本地换算，附常用相关单位。Convert circular inch and dunam (1 circ in = 5.06707479097e-07 dunam). 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
「圆英寸 ↔ 杜纳姆」是什么？What is the Circular inch to Dunam tool?
圆英寸与杜纳姆互算（1 circ in = 5.06707479097e-07 dunam）。本地换算，附常用相关单位。Convert circular inch and dunam (1 circ in = 5.06707479097e-07 dunam). Runs locally with related units.
如何使用「圆英寸 ↔ 杜纳姆」？How do I use the Circular inch to Dunam tool?
在「圆英寸 ↔ 杜纳姆」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 Circular inch to Dunam and choose the source unit; the table shows the value in every other unit at once, ready to copy.
1 圆英寸等于多少杜纳姆？How many dunam in 1 circular inch?
1 circ in = 5.06707479097e-07 dunam（按国际定义系数）。1 circ in = 5.06707479097e-07 dunam (international definition).
如何把圆英寸换算成杜纳姆？How do I convert circular inch to dunam?
结果 = 数值 × 5.06707479097e-07。例如 1973525.24139 circ in = 1 dunam。result = value × 5.06707479097e-07. Example: 1973525.24139 circ in = 1 dunam.
圆英寸/杜纳姆属于哪类单位？What kind of units are circular inch/dunam?
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?
「圆英寸 ↔ 杜纳姆」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 Circular inch to Dunam uses factors defined by the SI or other recognised standards and shows about 10 significant digits.
「圆英寸 ↔ 杜纳姆」免费吗？需要注册吗？Is the Circular inch to Dunam free? Do I need an account?
「圆英寸 ↔ 杜纳姆」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 Circular inch to Dunam is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.