⏬ 下载时间计算器Download Time Calculator
根据文件大小和网速（Mbps、MB/s 等）计算下载或上传所需时间，可考虑网络开销。How long a download or upload takes for a given file size and connection speed (Mbps, MB/s…), with overhead.
使用说明与常见问题How-to & FAQ
「下载时间计算器」是什么？What is the Download Time Calculator tool?
根据文件大小和网速（Mbps、MB/s 等）计算下载或上传所需时间，可考虑网络开销。How long a download or upload takes for a given file size and connection speed (Mbps, MB/s…), with overhead.
如何使用「下载时间计算器」？How do I use the Download Time Calculator tool?
在「下载时间计算器」中，填写「文件大小」、「单位」、「网速」、「网速单位」、「网络开销%」等参数，结果会随输入实时计算并显示在下方。In the Download Time Calculator: Fill in "File size", "Unit", "Speed", "Speed unit", "Overhead %"; results are recalculated instantly as you type.
需要联网吗？Does it need an internet connection?
不需要。「下载时间计算器」的解析和计算都在浏览器本地完成，不会向任何服务器发送请求。No. The Download Time Calculator parses and calculates entirely in your browser and sends no network requests.
「下载时间计算器」免费吗？需要注册吗？Is the Download Time Calculator free? Do I need an account?
「下载时间计算器」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 Download Time 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.