🟩 英亩 ↔ 平方码Acre to Square Yard
1 acre = 4840 yd²。支持英亩、平方码、平方英尺、平方米互算。1 acre = 4,840 yd². Units: acre, square yard, square foot, square metre.
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
「英亩 ↔ 平方码」是什么？What is the Acre to Square Yard tool?
1 acre = 4840 yd²。支持英亩、平方码、平方英尺、平方米互算。1 acre = 4,840 yd². Units: acre, square yard, square foot, square metre.
如何使用「英亩 ↔ 平方码」？How do I use the Acre to Square Yard tool?
在「英亩 ↔ 平方码」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 Acre to Square Yard and choose the source unit; the table shows the value in every other unit at once, ready to copy.
英亩和平方码是什么关系？How do acres and square yards relate?
1 英亩 = 4840 平方码 = 43560 平方英尺。历史上英亩是 1 弗隆（220 码）× 1 链（22 码）的面积，220 × 22 = 4840。1 acre = 4,840 sq yd = 43,560 sq ft. Historically an acre was one furlong (220 yd) by one chain (22 yd): 220 × 22 = 4,840.
1 英亩 等于多少其他单位？How much is 1 acre in the other units?
1 英亩 = 4840 平方码 = 43560 平方英尺 = 4046.856422 平方米（按定义系数计算，最多保留 10 位有效数字）。本页不接受负数：输入负值会提示错误。1 acre = 4840 square yard = 43560 square foot = 4046.856422 square metre (from the defined factors, up to 10 significant digits). Negative values are not accepted here and show an error.
有哪些选项可以调整？What options can I adjust?
「英亩 ↔ 平方码」的设置：「数值」默认 1。每次生成结果都按当前设置处理。Settings in the Acre to Square Yard — "Value" default 1. The result always uses the current settings.
换算系数准确吗？Are the conversion factors exact?
「英亩 ↔ 平方码」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 Acre to Square Yard uses factors defined by the SI or other recognised standards and shows about 10 significant digits.
「英亩 ↔ 平方码」免费吗？需要注册吗？Is the Acre to Square Yard free? Do I need an account?
「英亩 ↔ 平方码」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 Acre to Square Yard is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.