⚡ 焦耳 ↔ 兆瓦时Joule to Megawatt-hour
焦耳与兆瓦时互算（1 J = 2.77777777778e-10 MWh）。本地换算，附常用相关单位。Convert joule and megawatt-hour (1 J = 2.77777777778e-10 MWh). Runs locally with related units.
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
「焦耳 ↔ 兆瓦时」是什么？What is the Joule to Megawatt-hour tool?
焦耳与兆瓦时互算（1 J = 2.77777777778e-10 MWh）。本地换算，附常用相关单位。Convert joule and megawatt-hour (1 J = 2.77777777778e-10 MWh). Runs locally with related units.
如何使用「焦耳 ↔ 兆瓦时」？How do I use the Joule to Megawatt-hour tool?
在「焦耳 ↔ 兆瓦时」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 Joule to Megawatt-hour and choose the source unit; the table shows the value in every other unit at once, ready to copy.
1 焦耳等于多少兆瓦时？How many megawatt-hour in 1 joule?
1 J = 2.77777777778e-10 MWh（按国际定义系数）。1 J = 2.77777777778e-10 MWh (international definition).
如何把焦耳换算成兆瓦时？How do I convert joule to megawatt-hour?
结果 = 数值 × 2.77777777778e-10。例如 3600000000 J = 1 MWh。result = value × 2.77777777778e-10. Example: 3600000000 J = 1 MWh.
焦耳/兆瓦时属于哪类单位？What kind of units are joule/megawatt-hour?
二者同属「能量」量纲，可安全互算；也可打开「energy-converter」做多单位对照。Both are energy units; see also the energy converter hub.
换算系数准确吗？Are the conversion factors exact?
「焦耳 ↔ 兆瓦时」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 Joule to Megawatt-hour uses factors defined by the SI or other recognised standards and shows about 10 significant digits.
「焦耳 ↔ 兆瓦时」免费吗？需要注册吗？Is the Joule to Megawatt-hour free? Do I need an account?
「焦耳 ↔ 兆瓦时」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 Joule to Megawatt-hour is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.