dBm to Volt peak to peak (Vpp) Calculator

This tool converts from a dBm power value to Vpeak-to-peak. It also calculates the RMS voltage.

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

arrow Volt peak-to-peak to dBm


Vpeak-to-peak = 2*SQRT((2*Z)/1000)*10(PdBm/20)

Example Calculation

1 dBm into a 50 ohm impedance translates to Vpk-to-pk of 0.71 Volt.

The same power into half the impedance value gives a peak to peak voltage of 0.51 V.

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