This convertor calculates the Effective Isotropic Radiated Power (EIRP) based on your transmitter power, cable losses, and antenna gain. It allows engineers and RF enthusiasts to quickly determine the equivalent radiated power in multiple units.
Formula Used in EIRP Convertor
EIRP (dBm) = Transmit Power (dBm) – Loss (dB) + Antenna Gain (dBi)
EIRP (dBW) = EIRP (dBm) – 30
EIRP (Watts) = 10^(EIRP(dBm)/10) / 1000
How the Formula Works
The EIRP in dBm is calculated by adjusting the transmitter power with the losses from cables and connectors and adding the antenna’s gain. Converting dBm to dBW subtracts 30, while converting to Watts uses the standard logarithmic relationship.
Example Calculation with the Convertor
If your transmitter outputs 20 dBm, cable loss is 3 dB, and antenna gain is 12 dBi:
EIRP (dBm) = 20 – 3 + 12 = 29 dBm
EIRP (dBW) = 29 – 30 = -1 dBW
EIRP (Watts) = 10^(29/10) / 1000 ≈ 0.794 W
Reasons to use this EIRP Convertor:
1. Quickly determine the radiated power for regulatory compliance.
2. Optimize antenna placement and system performance.
3. Simplifies link budget calculations for RF communication systems.
4. Supports multiple units to fit different design standards.
5. Useful for engineers, technicians, and RF hobbyists planning wireless links.
