Amateur Radio Club
Watts <> dBm <> Volts Converter
This calculator converts between watts, dBm, volts and dBmV.
Select the Impedance then enter any one of the other parameters below and the rest will be calculated automatically
|0||1||Exact by definition of dBm|
|3||2||3 dBm is actually 1.995 mW but that's near enough for most practical purposes|
|+3||X 2||Adding 3 to the power in dBm is the same as multiplying the power in Watts by two (actually 1.995 but that's near enough for most practical purposes)|
|+10||X 10||Adding 10 the the power in dBm is exactly the same as multiplying the power in Watts by 10|
Voltage Divider Resistance Calculator
Enter any of the three values and then click the Calculate button.