EIRP Calculator

Effective Isotropic Radiated Power or Equivalent Isotropically Radiated Power (EIRP) is a measure of the radiated output power from an ideal isotropic antenna in a single direction. It is the maximum available radiation at the antenna after all power losses and gains in the system have been taken into consideration. This calculator calculates the Effective Isotropic Radiated Power.

Enter Output Power of the Transmitter, Cable Loss and Antenna Gain

  • dBm
  • dB
  • dB


  • Effective Isotropic Radiated Power
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Effective Isotropic Radiated Power (EIRP) is the power that would need to be radiated by a hypothetical isotropic antenna in order to achieve a signal level that is similar in the direction of the antenna's highest radiation. The EIRP allows comparisons between different emitters regardless of type, size or form. Manufacturers of access points often indicate the transmitter power in EIRP which denotes that the equipment complies with the rules when simply using an external or built-in antenna. It is represented in dBm.