🟩 圆英寸 ↔ 平方链Circular inch to Square chain
圆英寸与平方链互算（1 circ in = 1.25210144915e-06 ch²）。本地换算，附常用相关单位。Convert circular inch and square chain (1 circ in = 1.25210144915e-06 ch²). 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 ↔ 平方链」是什么？What is the Circular inch to Square chain tool?
圆英寸与平方链互算（1 circ in = 1.25210144915e-06 ch²）。本地换算，附常用相关单位。Convert circular inch and square chain (1 circ in = 1.25210144915e-06 ch²). Runs locally with related units.
如何使用「圆英寸 ↔ 平方链」？How do I use the Circular inch to Square chain tool?
在「圆英寸 ↔ 平方链」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 Square chain and choose the source unit; the table shows the value in every other unit at once, ready to copy.
1 圆英寸等于多少平方链？How many square chain in 1 circular inch?
1 circ in = 1.25210144915e-06 ch²（按国际定义系数）。1 circ in = 1.25210144915e-06 ch² (international definition).
如何把圆英寸换算成平方链？How do I convert circular inch to square chain?
结果 = 数值 × 1.25210144915e-06。例如 798657.329789 circ in = 1 ch²。result = value × 1.25210144915e-06. Example: 798657.329789 circ in = 1 ch².
圆英寸/平方链属于哪类单位？What kind of units are circular inch/square chain?
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 ↔ 平方链」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 Square chain uses factors defined by the SI or other recognised standards and shows about 10 significant digits.
「圆英寸 ↔ 平方链」免费吗？需要注册吗？Is the Circular inch to Square chain free? Do I need an account?
「圆英寸 ↔ 平方链」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 Square chain is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.