diff --git a/homeassistant/components/sensor/const.py b/homeassistant/components/sensor/const.py
index f1b158ab4dd..09bddd0f1e0 100644
--- a/homeassistant/components/sensor/const.py
+++ b/homeassistant/components/sensor/const.py
@@ -43,6 +43,7 @@ from homeassistant.util.unit_conversion import (
     EnergyConverter,
     InformationConverter,
     MassConverter,
+    PowerConverter,
     PressureConverter,
     SpeedConverter,
     TemperatureConverter,
@@ -429,6 +430,7 @@ UNIT_CONVERTERS: dict[SensorDeviceClass | str | None, type[BaseUnitConverter]] =
     SensorDeviceClass.DISTANCE: DistanceConverter,
     SensorDeviceClass.ENERGY: EnergyConverter,
     SensorDeviceClass.GAS: VolumeConverter,
+    SensorDeviceClass.POWER: PowerConverter,
     SensorDeviceClass.POWER_FACTOR: UnitlessRatioConverter,
     SensorDeviceClass.PRECIPITATION: DistanceConverter,
     SensorDeviceClass.PRECIPITATION_INTENSITY: SpeedConverter,
diff --git a/tests/components/sensor/test_websocket_api.py b/tests/components/sensor/test_websocket_api.py
index c2187d5fe7c..0bde4070c81 100644
--- a/tests/components/sensor/test_websocket_api.py
+++ b/tests/components/sensor/test_websocket_api.py
@@ -33,7 +33,7 @@ async def test_device_class_units(hass: HomeAssistant, hass_ws_client) -> None:
         {
             "id": 2,
             "type": "sensor/device_class_convertible_units",
-            "device_class": "power",
+            "device_class": "pm1",
         }
     )
     msg = await client.receive_json()