Effective Radiated Power (ERP) Calculator

In wireless transmission, ERP is the acronym for Effective Radiated Power. ERP is the sum of the transmitter RF power plus antenna gain, minus any transmission, filtering, combining, or interconnecting cable losses. ERP can be difficult to calculate because transmitter output power is often stated in watts while antenna gain and losses are stated in decibels (dB). The following calculator removes the guess work in unit differences and allows one to calculate ERP from known transmission variables.

If you would like to calculate just wattage and antenna gain without the transmission line and its effects, simply insert a low frequency into the Frequency text box (0.01 MHz) and insert a very short length in the Transmission Line Length text box (0.01 feet).

Transmitter Outuput Power:
W or kW
Transmission Line Type:
Transmission Line Length:
Antenna Gain:
W or kW

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