diff --git a/homeassistant/components/group/sensor.py b/homeassistant/components/group/sensor.py
index 52ce90b2535..088678b6c1a 100644
--- a/homeassistant/components/group/sensor.py
+++ b/homeassistant/components/group/sensor.py
@@ -244,7 +244,6 @@ class SensorGroup(GroupEntity, SensorEntity):
 
     _attr_available = False
     _attr_should_poll = False
-    _attr_icon = "mdi:calculator"
 
     def __init__(
         self,
@@ -352,6 +351,16 @@ class SensorGroup(GroupEntity, SensorEntity):
             return self._attr_device_class
         return self.calc_device_class
 
+    @property
+    def icon(self) -> str | None:
+        """Return the icon.
+
+        Only override the icon if the device class is not set.
+        """
+        if not self.device_class:
+            return "mdi:calculator"
+        return None
+
     @property
     def state_class(self) -> SensorStateClass | str | None:
         """Return state class."""
diff --git a/tests/components/group/test_sensor.py b/tests/components/group/test_sensor.py
index 03e067a5082..89897e3e985 100644
--- a/tests/components/group/test_sensor.py
+++ b/tests/components/group/test_sensor.py
@@ -24,6 +24,7 @@ from homeassistant.components.sensor import (
 from homeassistant.const import (
     ATTR_DEVICE_CLASS,
     ATTR_ENTITY_ID,
+    ATTR_ICON,
     ATTR_UNIT_OF_MEASUREMENT,
     SERVICE_RELOAD,
     STATE_UNAVAILABLE,
@@ -99,6 +100,7 @@ async def test_sensors(
     for key, value in attributes.items():
         assert state.attributes.get(key) == value
     assert state.attributes.get(ATTR_DEVICE_CLASS) == SensorDeviceClass.VOLUME
+    assert state.attributes.get(ATTR_ICON) is None
     assert state.attributes.get(ATTR_STATE_CLASS) == SensorStateClass.MEASUREMENT
     assert state.attributes.get(ATTR_UNIT_OF_MEASUREMENT) == "L"