Free Online Tool

dBm to Watt Converter

Convert RF power values between dBm, mW, and W for communication and RF circuit work.

The result will appear here.

How to Use

  1. Choose the input unit from dBm, mW, or W.
  2. Enter a value.
  3. Review the result in dBm, mW, and W.

Examples

  • Check that 0dBm equals 1mW
  • Convert 1W to 30dBm

Calculation and Conversion Notes

To convert dBm to mW, the tool uses `P(mW) = 10^(dBm / 10)`. To convert mW to dBm, it uses `dBm = 10 × log10(P(mW))`. W and mW are converted using `P(mW) = P(W) × 1000`.

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