dBm to milliwatts calculator

RF power in dBm measures decibels relative to one milliwatt.

Formula

P(mW) = 10^(dBm / 10)

Worked example

At 0 dBm, power is 1 mW. At 30 dBm, power is 1,000 mW (1 W).

A change of 10 dB multiplies power by ten.

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