dBw is the same as dBm, dBw is a unit that represents the absolute value of power (based on 1W power, dBm is based on 1mW)
The formula for calculating dBw is:
Conversion of dBw and dBm: 0 dBw = 10log1 W = 10log1000 mw = 30 dBm
Enter the corresponding value and click "convert" to convert the calculation.