⚪ 球体计算器Sphere Calculator
输入半径、直径、表面积或体积中的任意一个，求球的其余参数（含体积换算为升）。Enter a sphere's radius, diameter, surface area or volume to get all the others (with volume in liters).
使用说明与常见问题How-to & FAQ
「球体计算器」是什么？What is the Sphere Calculator tool?
输入半径、直径、表面积或体积中的任意一个，求球的其余参数（含体积换算为升）。Enter a sphere's radius, diameter, surface area or volume to get all the others (with volume in liters).
如何使用「球体计算器」？How do I use the Sphere Calculator tool?
在「球体计算器」中，填写「数值」、「已知」、「长度单位」等参数，结果会随输入实时计算并显示在下方。In the Sphere Calculator: Fill in "Value", "Given", "Length unit"; results are recalculated instantly as you type.
计算精度如何？How precise are the results?
「球体计算器」使用 JavaScript 双精度浮点数（约 15–16 位有效数字）；极大或极小的数值可能存在精度误差。The Sphere Calculator uses double-precision floating point (about 15–16 significant digits); very large or very small values may lose precision.
「球体计算器」免费吗？需要注册吗？Is the Sphere Calculator free? Do I need an account?
「球体计算器」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 Sphere Calculator is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.