dBm to Volts Calculator

This tool converts Power in dBm to Voltage.

The default impedance (Z) is 50 ohm, although you can change that to any value.

arrow Convert Volt to dBm


V = SQRT(Z/1000)*10(PdBm/20)

Example Calculation

1 dBm into a 50 ohm impedance translates to Voltage of 251 millivolt.

The same power into half the impedance value gives 177 mV.

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