ERP ↔ EIRP Converter
Convert between effective radiated power (ERP, dipole reference) and equivalent isotropically radiated power (EIRP, isotropic reference). The difference is 2.15 dB.
Results will appear here
Conversion:
- EIRP [dB] = ERP [dB] + 2.15 dB
- EIRP [linear] = ERP [linear] × 10(2.15/10) ≈ ERP × 1.6406
ERP is referenced to a half-wave dipole; EIRP is referenced to an isotropic radiator.
The calculator compares power values stated against different reference antennas. The applicable technical or regulatory requirement determines which reference quantity must be used.
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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