Volt to dBm Calculator

Use this calculator to convert from Volt to Power in dBm. Note that Volt implies a it’s a root-mean-square value or VRMS

The default impedance is 50 ohm. However it can be changed to any value.

You can use this calculator to convert voltage specifications for an operational amplifier (Opamp) or analog-to-digital converter (ADC) to a dBm value. The RF input level to a receiver is specified in dBm, so this tool will help you convert from one to the other.

Pay special attention to the input impedance of the ADC when using the tool. In many cases it is not clearly mentioned or specified in the data sheet.

If instead you would like to convert from Vpeak-peak to dBm, use this calculator instead.

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