ERP Calculator

Do not use this calculator for frequencies above 499Mhz.

 Power from Rig:     Watts 
 Frequency:     MHz
 Coax Type:   
  Coax Length:     Metres
Antenna Type:      Gain:  dB( i )

  Watts   dB   dBi

Please note that although dBi is rarely used these days this calculator provides for either option.

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