Calculate the Effective Isotropic Radiated Power of a radio transmitter.
Radio Parameters
Radiation Results
Enter power, loss, and gain
About this calculator
Quick Reference
PTransmitter power output
LCable & connector losses
GAntenna gain (isotropic)
dBmPower relative to 1 milliwatt
Overview
EIRP represents the total power that would need to be radiated by an isotropic antenna to produce the same signal strength as the actual antenna in its direction of maximum gain.
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Pro Tips
EIRP = P (dBm) - L (dB) + G (dBi).
To convert Watts to dBm: dBm = 10 * log10(P_mW).
Isotropic antenna is a theoretical antenna that radiates equally in all directions.
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Fun Facts
"Regulatory bodies like the FCC set EIRP limits to prevent interference between radio services."
"A 3 dB increase in EIRP corresponds to a doubling of the radiated power."
"Satellite TV dishes have high gain (G) to capture weak signals from space."
