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EIRP Calculator

Pasternack's EIRP Calculator determines the radiated power given the transmitter power, the cable loss to the antenna, and the gain of the antenna.

Radar Output Power:
Cable Loss (dB):
Antenna Gain (dBi):

Result:
Effective Isotropic
Radiated Power:

EIRP, or effective isotropically radiated power, or equivalent isotropically radiated power, is a measurement of output power in one direction from an ideal, one dimensional source. The ideal point-source radiates electromagnetic energy in a spherical pattern, so the "maximum" radiated power should be the same in all directions.

**Note: Like our EIRP calculator, all of our RF calculators allow SI prefix input. For example, if you wish to input "25000000", just type "25M" instead. See the quick-reference table below for all compatible SI prefixes.
Prefix Symbol Value
Tera 'T' 1012
Giga 'G' 109
Mega 'M' 106
kilo 'k' 103
Prefix Symbol Value
pico 'p' 10-12
nano 'n' 10-9
micro 'u' 10-6
milli 'm' 10-3