www.KF6ELU.com dBW Calculator
 Power Calculator — db /Watts/ EIRP


Convert dBWatts to Watts

Enter Value (dBW) :  dBWatts =  Watts 

Convert Watts to dBWatts

Enter Value (Watts) :  Watts =  dBW 

Calculating ERP and EIRP

Enter the Transmitter Power Output (TPO) : 
Enter the Antenna Gain :  dBi-2.15 = dBd
Effective Radiated Power (ERP) =  dBW =  Watts 
Effective Isotropic Radiated Power (EIRP) =  dBW =  Watts 

NOTE: Some companies present the gain of their antennas in dBi, not dBd, as most do. That makes it look like they have the same (or more) gain as other antennas, but subtract 2.15 dB from the dBi and you have leveled the playing field.

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