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🧭 经纬度度分秒转换Degrees Minutes Seconds Converter
经纬度在十进制度（39.9087°）和度分秒（39°54′31.3″N）、度+十进制分之间互相转换，支持批量和各种写法，自动识别南纬、西经。Convert latitude/longitude between decimal degrees (39.9087°), degrees-minutes-seconds (39°54′31.3″N) and degrees + decimal minutes, in batches and with almost any notation, including S/W hemispheres.
使用说明与常见问题How-to & FAQ
「经纬度度分秒转换」是什么？What is the Degrees Minutes Seconds Converter tool?
经纬度在十进制度（39.9087°）和度分秒（39°54′31.3″N）、度+十进制分之间互相转换，支持批量和各种写法，自动识别南纬、西经。Convert latitude/longitude between decimal degrees (39.9087°), degrees-minutes-seconds (39°54′31.3″N) and degrees + decimal minutes, in batches and with almost any notation, including S/W hemispheres.
如何使用「经纬度度分秒转换」？How do I use the Degrees Minutes Seconds Converter?
每行输入一个数值或一对坐标，可以写成 39.9087、39°54'31.3"N、39 54 31.3 N、N39°54.522' 等形式，选择输出格式即可。负数表示南纬或西经。Enter one value or coordinate pair per line — 39.9087, 39°54'31.3"N, 39 54 31.3 N or N39°54.522' all work — and choose the output format. Negative numbers mean south or west.
度分秒和十进制度怎么换算？How do DMS and decimal degrees relate?
1 度 = 60 分，1 分 = 60 秒。十进制度 = 度 + 分 ÷ 60 + 秒 ÷ 3600；反过来把小数部分乘 60 得到分，再把分的小数部分乘 60 得到秒。1 degree = 60 minutes and 1 minute = 60 seconds. Decimal = degrees + minutes/60 + seconds/3600; going back, multiply the fraction by 60 for minutes and the remaining fraction by 60 for seconds.
1 秒对应地面多远？How far is one arc-second on the ground?
纬度方向 1″ 约 30.9 米，0.01″ 约 31 厘米；经度方向的距离还要乘以 cos(纬度)，在北京约 23.7 米。One arc-second of latitude is about 30.9 m (0.01″ ≈ 31 cm); for longitude multiply by cos(latitude) — about 23.7 m in Beijing.
「经纬度度分秒转换」免费吗？数据会上传吗？Is the Degrees Minutes Seconds Converter free? Is my data uploaded?
「经纬度度分秒转换」完全免费，无需注册或安装，手机和电脑都能用；所有处理都在你的浏览器本地完成，输入的内容和文件不会上传到服务器。The Degrees Minutes Seconds Converter is completely free with no sign-up or install and works on phones and desktops; everything runs locally in your browser and nothing you enter is uploaded.