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📶 dBm 转瓦特dBm to Watts
P(W)=10^((dBm-30)/10)。可设置「方向」、「数值」。P(W)=10^((dBm-30)/10). Settings: Direction, Value.
使用说明与常见问题How-to & FAQ
「dBm 转瓦特」是什么？What is the dBm to Watts tool?
P(W)=10^((dBm-30)/10)。可设置「方向」、「数值」。P(W)=10^((dBm-30)/10). Settings: Direction, Value.
如何使用「dBm 转瓦特」？How do I use the dBm to Watts tool?
在「dBm 转瓦特」中，填写「方向」、「数值」等参数，结果会随输入实时计算并显示在下方。In the dBm to Watts: Fill in "Direction", "Value"; results are recalculated instantly as you type.
dBm 的定义是什么？How is dBm defined?
dBm 是以 1 毫瓦为基准的分贝值：0 dBm = 1 mW，30 dBm = 1 W，每增加 10 dB 功率乘以 10，每增加 3 dB 约翻倍。公式 P(W) = 10^((dBm − 30) ÷ 10)。dBm is decibels relative to 1 milliwatt: 0 dBm = 1 mW and 30 dBm = 1 W; every +10 dB multiplies the power by 10 and +3 dB roughly doubles it. P(W) = 10^((dBm − 30) ÷ 10).
能举个计算实例吗？Can you show a worked example?
例如在「dBm 转瓦特」中填 方向 = dBm→W，数值 = 0，结果区显示：功率：0.001 W；毫瓦：1 mWFor example, entering Direction = dBm→W, Value = 0 in the dBm to Watts gives: Power: 0.001 W; Milliwatts: 1 mW
哪些输入会被检查？Which inputs are validated?
「dBm 转瓦特」会检查这些输入——「数值」：所选方式用到时必须填写，须大于 0；绝对值超过 10¹⁵ 的数也会被拒绝。不符合时结果区显示具体提示，不会给出数字。The dBm to Watts checks its inputs — "Value": required when the chosen option uses it, must be greater than 0; numbers above 10¹⁵ in absolute value are rejected too. When a value fails, the result area names the problem instead of showing a number.
有哪些选项可以调整？What options can I adjust?
「dBm 转瓦特」的设置：「方向」可选 dBm→W、W→dBm（默认 dBm→W）；「数值」默认 0。每次生成结果都按当前设置处理。Settings in the dBm to Watts — "Direction": dBm→W, W→dBm (default dBm→W); "Value" default 0. The result always uses the current settings.
计算结果可以用于作业或工程吗？Can I use the results for homework or engineering?
「dBm 转瓦特」使用教科书标准公式（公式写在说明和常见问题中），适合学习和估算核对；涉及安全的工程设计请以规范和实测为准。The dBm to Watts uses standard textbook formulas (given in the description and FAQ), which is good for learning and checking estimates; for safety-critical engineering follow codes and measured values.
「dBm 转瓦特」免费吗？需要注册吗？Is the dBm to Watts free? Do I need an account?
「dBm 转瓦特」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 dBm to Watts is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.