🌾 英亩换算平方英尺（ac 转 ft²）Acres to Square feet Converter (ac to ft²)

使用说明与常见问题How-to & FAQ

「英亩换算平方英尺（ac 转 ft²）」是什么？What is the Acres to Square feet Converter (ac to ft²) tool?

把英亩换算成平方英尺：输入数值立即得到结果，并附换算公式和常用值对照表。Convert acres to square feet instantly, with the conversion formula and a table of common values.

如何使用「英亩换算平方英尺（ac 转 ft²）」？How do I use the Acres to Square feet Converter (ac to ft²) tool?

在「英亩换算平方英尺（ac 转 ft²）」中，填写「英亩 (ac)」等参数，结果会随输入实时计算并显示在下方。In the Acres to Square feet Converter (ac to ft²): Fill in "Acres (ac)"; results are recalculated instantly as you type.

1 英亩等于多少平方英尺？How many square feet are in 1 acre?

1 ac = 43560 ft²。1 ac = 43560 ft².

如何手动把英亩换算成平方英尺？How do I convert acres to square feet by hand?

用公式 平方英尺 = 英亩 × 43560。例如 1 ac = 43560 ft²。Use square feet = acres × 43560. For example, 1 ac = 43560 ft².

有什么需要注意的？Anything to watch out for?

1 英亩 = 43,560 平方英尺（国际英尺）。按美国测量英尺定义的“测量英亩”（约 4,046.873 m²）比国际英亩（4,046.856 m²）大约百万分之四（测量英尺本身只差约百万分之二，面积是平方关系），日常可忽略。1 acre = 43,560 square feet (international foot). The older US survey acre (about 4,046.873 m²) is about 4 ppm larger than the international acre (4,046.856 m²) — the survey foot differs by about 2 ppm, and area doubles that.

可以反向换算吗？Can I convert the other way?

可以。页面下方有反向换算页面的链接，也可以打开完整的单位换算器，在多种单位之间同时换算。「英亩换算平方英尺（ac 转 ft²）」的换算系数采用国际标准定义。Yes. Use the reverse-conversion link below, or open the full unit converter to see many units at once. The Acres to Square feet Converter (ac to ft²) uses internationally defined factors.

「英亩换算平方英尺（ac 转 ft²）」免费吗？需要注册吗？Is the Acres to Square feet Converter (ac to ft²) free? Do I need an account?

「英亩换算平方英尺（ac 转 ft²）」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 Acres to Square feet Converter (ac to ft²) is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.