Can I use this tool for any antenna system?

Yes, as long as you have the feedline loss and transmitter power values.

Do I need to account for feeder loss separately?

Yes, the calculator assumes feeder loss is already included in your input values.

Can I use this for regulatory compliance calculations?

Yes, but verify local regulations, as some jurisdictions have additional restrictions beyond ERP limits.

EIRP Calculator — Effective Isotropic Radiated Power

Provided byOmni Calculatoromnicalculator.com

The EIRP calculator helps you determine the effective isotropic radiated power, i.e., the actual power level radiated...

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Energy, work, and power calculators

Screenshot of EIRP Calculator — Effective Isotropic Radiated Power on Omni Calculator — omnicalculator.comOpen the live tool →

About this tool

What EIRP Calculator — Effective Isotropic Radiated Power does

EIRP (Effective Isotropic Radiated Power) is the total power radiated from an antenna in a specific direction, calculated by adding the transmitter output power to antenna gain and cable losses. It is calculated as EIRP = transmitter power + antenna gain - feed line loss. This metric is essential for regulatory compliance and link budget calculations in radio planning, as it represents the effective radiated power (ERP) of the system.

Step by step

How to use the Omni Calculator EIRP Calculator — Effective Isotropic Radiated Power

1
Identify the transmitter power output in watts or dBm.
2
Subtract cable and connector losses using the formula: EIRP = Input Power - Cable Loss.
3
Apply the result to link budget calculations or regulatory compliance checks.

Is it right for you

Best for

Link budget planning and regulatory compliance verification.

Limitations

Does not account for multipath fading or atmospheric conditions.
Assumes ideal feeder cable loss; real-world losses may vary.

Questions

EIRP Calculator — Effective Isotropic Radiated Power FAQ

Can I use this tool for any antenna system?: Yes, as long as you have the feedline loss and transmitter power values.
Do I need to account for feeder loss separately?: Yes, the calculator assumes feeder loss is already included in your input values.
Can I use this for regulatory compliance calculations?: Yes, but verify local regulations, as some jurisdictions have additional restrictions beyond ERP limits.

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