diff --git a/lib/microwaveprop/beacons/range_estimate.ex b/lib/microwaveprop/beacons/range_estimate.ex
index c26dd15b..532cc408 100644
--- a/lib/microwaveprop/beacons/range_estimate.ex
+++ b/lib/microwaveprop/beacons/range_estimate.ex
@@ -7,8 +7,10 @@ defmodule Microwaveprop.Beacons.RangeEstimate do
       Rx_dBm = EIRP_dBm + Rx_gain_dBi - FSPL(d, f) - atm_loss_per_km * d
 
   for the distance `d` at which the received power equals the tier threshold.
-  Free-space path loss uses the standard formula and atmospheric absorption
-  comes from the band's O₂/H₂O coefficients in `BandConfig`.
+  `EIRP_dBm` comes directly from the beacon's stored `power_mw` — the field
+  already represents EIRP (TX power × antenna gain). Free-space path loss uses
+  the standard formula and atmospheric absorption comes from the band's
+  O₂/H₂O coefficients in `BandConfig`.
 
   The result is then multiplied by a propagation-score factor derived from the
   latest `propagation_scores` row at the beacon's lat/lon — score 50 → 1.0x,
@@ -32,8 +34,6 @@ defmodule Microwaveprop.Beacons.RangeEstimate do
   # Assume the receiving station is an average amateur microwave station
   # (dish/horn + low-noise preamp).
   @rx_gain_dbi 20.0
-  # Beacons are typically omnidirectional.
-  @tx_gain_dbi 0.0
 
   @doc """
   Convert a power in milliwatts to dBm. Returns `-999.9` for non-positive input.
@@ -68,7 +68,7 @@ defmodule Microwaveprop.Beacons.RangeEstimate do
     valid_time = detail && detail.valid_time
 
     f_mhz = beacon.frequency_mhz * 1.0
-    eirp_dbm = mw_to_dbm(beacon.power_mw || 0.0) + @tx_gain_dbi
+    eirp_dbm = mw_to_dbm(beacon.power_mw || 0.0)
 
     atm_per_km = atm_loss_per_km(band_config)
     score_mult = 0.5 + score / 100.0
diff --git a/lib/microwaveprop_web/live/beacon_live/form.ex b/lib/microwaveprop_web/live/beacon_live/form.ex
index b1161a2b..1cd69468 100644
--- a/lib/microwaveprop_web/live/beacon_live/form.ex
+++ b/lib/microwaveprop_web/live/beacon_live/form.ex
@@ -32,7 +32,7 @@ defmodule MicrowavepropWeb.BeaconLive.Form do
         <.input
           field={@form[:power_mw]}
           type="number"
-          label="Power (mW)"
+          label="TX power (EIRP) (mW)"
           step="any"
           required
         />
diff --git a/lib/microwaveprop_web/live/beacon_live/index.ex b/lib/microwaveprop_web/live/beacon_live/index.ex
index d3e15edc..c160f681 100644
--- a/lib/microwaveprop_web/live/beacon_live/index.ex
+++ b/lib/microwaveprop_web/live/beacon_live/index.ex
@@ -28,7 +28,7 @@ defmodule MicrowavepropWeb.BeaconLive.Index do
         <:col :let={{_id, beacon}} label="Grid">{beacon.grid}</:col>
         <:col :let={{_id, beacon}} label="Lat">{beacon.lat}</:col>
         <:col :let={{_id, beacon}} label="Lon">{beacon.lon}</:col>
-        <:col :let={{_id, beacon}} label="Power (mW)">{beacon.power_mw}</:col>
+        <:col :let={{_id, beacon}} label="EIRP (mW)">{beacon.power_mw}</:col>
         <:col :let={{_id, beacon}} label="Height AGL (ft)">{beacon.height_ft}</:col>
         <:col :let={{_id, beacon}} label="On air">
           <span class={["badge badge-sm", beacon.on_the_air && "badge-success" || "badge-ghost"]}>
diff --git a/lib/microwaveprop_web/live/beacon_live/show.ex b/lib/microwaveprop_web/live/beacon_live/show.ex
index 9b47d76f..f56e63b4 100644
--- a/lib/microwaveprop_web/live/beacon_live/show.ex
+++ b/lib/microwaveprop_web/live/beacon_live/show.ex
@@ -79,7 +79,7 @@ defmodule MicrowavepropWeb.BeaconLive.Show do
         <:item title="Grid">{@beacon.grid}</:item>
         <:item title="Latitude">{@beacon.lat}</:item>
         <:item title="Longitude">{@beacon.lon}</:item>
-        <:item title="Power (mW)">{@beacon.power_mw}</:item>
+        <:item title="TX power (EIRP) (mW)">{@beacon.power_mw}</:item>
         <:item title="Height above ground (ft)">{@beacon.height_ft}</:item>
         <:item title="On the air">{if @beacon.on_the_air, do: "Yes", else: "No"}</:item>
       </.list>