Radiated Power Calculator
Convert between EIRP, ERP and idealized free-space electric field strength at 3 m or 10 m. Power may be entered in mW or dBm; field strength is expressed in dBµV/m.
| Unit | Value |
|---|---|
| EIRP (mW) | – |
| EIRP (dBm) | – |
| ERP (mW) | – |
| ERP (dBm) | – |
| dBµV/m at 3m | – |
| dBµV/m at 10m | – |
Model assumptions:
- EIRP is referenced to an ideal isotropic radiator; ERP is referenced to a half-wave dipole.
- EIRP/ERP uses the exact 2.15 dB relationship: 102.15/10 ≈ 1.64.
- Values at 3 m and 10 m are idealized free-space far-field estimates.
The field-strength values are engineering estimates for ideal far-field free-space conditions. They do not account for cable loss, mismatch, antenna pattern, reflections or a prescribed regulatory measurement setup.
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Last updated on September 24, 2026
Author: IBL-Editors Team
Technical Review: Andreas Bender - Deputy Managing Director | IBL-Lab GmbH Give feedback on this article
Author: IBL-Editors Team
Technical Review: Andreas Bender - Deputy Managing Director | IBL-Lab GmbH Give feedback on this article