ERP and EIRP Calculator

Calculation of ERP and EIRP
(Effective radiated power and effective isotropic radiated power)

Calculation of ERP and EIRP

If you know the lenght of your transmission line and have
an approximate value for the loss in the transmission line
per 100 ft, use this spreadsheet:

Power of Transmitted signal Pt (W):		Enter Value
Gain of Transmitting Antenna Gt (dBi):		Enter Value
Loss in TX transmission line (db/100ft):		Enter Value
Lenght of TX transmission line (m):		Enter Value
Total loss in transmission line (db):		Calculated
ERP (dBW):		Calculated
EIRP (dBW):		Calculated
dBm:		Calculated
ERP (W):		Calculated
EIRP (W):		Calculated

If you have measured the loss of your transmission line
at the frequency you want to transmit on,
use this spreadsheet:

Power of Transmitted signal Pt (W):		Enter Value
Gain of Transmitting Antenna Gt (dBi):		Enter Value
Loss in TX transmission line (db):		Enter Value
ERP (dBW):		Calculated
EIRP (dBW):		Calculated
dBm:		Calculated
ERP (W):		Calculated
EIRP (W):		Calculated


* To calculate the power at the end of a transmission line,
set the antenna gain to 0 dB.

This page was last updated 21.12.14

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