diff --git a/homeassistant/components/here_travel_time/coordinator.py b/homeassistant/components/here_travel_time/coordinator.py
index 447a45f5d2b..2c678316939 100644
--- a/homeassistant/components/here_travel_time/coordinator.py
+++ b/homeassistant/components/here_travel_time/coordinator.py
@@ -133,8 +133,8 @@ class HERERoutingDataUpdateCoordinator(DataUpdateCoordinator[HERETravelTimeData]
     def _parse_routing_response(self, response: dict[str, Any]) -> HERETravelTimeData:
         """Parse the routing response dict to a HERETravelTimeData."""
         distance: float = 0.0
-        duration: float = 0.0
-        duration_in_traffic: float = 0.0
+        duration: int = 0
+        duration_in_traffic: int = 0
 
         for section in response["routes"][0]["sections"]:
             distance += DistanceConverter.convert(
@@ -167,8 +167,8 @@ class HERERoutingDataUpdateCoordinator(DataUpdateCoordinator[HERETravelTimeData]
             destination_name = names[0]["value"]
         return HERETravelTimeData(
             attribution=None,
-            duration=round(duration / 60),
-            duration_in_traffic=round(duration_in_traffic / 60),
+            duration=duration,
+            duration_in_traffic=duration_in_traffic,
             distance=distance,
             origin=f"{mapped_origin_lat},{mapped_origin_lon}",
             destination=f"{mapped_destination_lat},{mapped_destination_lon}",
@@ -271,13 +271,13 @@ class HERETransitDataUpdateCoordinator(
             UnitOfLength.METERS,
             UnitOfLength.KILOMETERS,
         )
-        duration: float = sum(
+        duration: int = sum(
             section["travelSummary"]["duration"] for section in sections
         )
         return HERETravelTimeData(
             attribution=attribution,
-            duration=round(duration / 60),
-            duration_in_traffic=round(duration / 60),
+            duration=duration,
+            duration_in_traffic=duration,
             distance=distance,
             origin=f"{mapped_origin_lat},{mapped_origin_lon}",
             destination=f"{mapped_destination_lat},{mapped_destination_lon}",
diff --git a/homeassistant/components/here_travel_time/sensor.py b/homeassistant/components/here_travel_time/sensor.py
index 71184797a2e..da93c6e301e 100644
--- a/homeassistant/components/here_travel_time/sensor.py
+++ b/homeassistant/components/here_travel_time/sensor.py
@@ -56,7 +56,8 @@ def sensor_descriptions(travel_mode: str) -> tuple[SensorEntityDescription, ...]
             key=ATTR_DURATION,
             state_class=SensorStateClass.MEASUREMENT,
             device_class=SensorDeviceClass.DURATION,
-            native_unit_of_measurement=UnitOfTime.MINUTES,
+            native_unit_of_measurement=UnitOfTime.SECONDS,
+            suggested_unit_of_measurement=UnitOfTime.MINUTES,
         ),
         SensorEntityDescription(
             translation_key="duration_in_traffic",
@@ -64,7 +65,8 @@ def sensor_descriptions(travel_mode: str) -> tuple[SensorEntityDescription, ...]
             key=ATTR_DURATION_IN_TRAFFIC,
             state_class=SensorStateClass.MEASUREMENT,
             device_class=SensorDeviceClass.DURATION,
-            native_unit_of_measurement=UnitOfTime.MINUTES,
+            native_unit_of_measurement=UnitOfTime.SECONDS,
+            suggested_unit_of_measurement=UnitOfTime.MINUTES,
         ),
         SensorEntityDescription(
             translation_key="distance",
diff --git a/tests/components/here_travel_time/test_sensor.py b/tests/components/here_travel_time/test_sensor.py
index 0231ac6428f..22042f863bc 100644
--- a/tests/components/here_travel_time/test_sensor.py
+++ b/tests/components/here_travel_time/test_sensor.py
@@ -150,10 +150,10 @@ async def test_sensor(
     duration = hass.states.get("sensor.test_duration")
     assert duration.attributes.get("unit_of_measurement") == UnitOfTime.MINUTES
     assert duration.attributes.get(ATTR_ICON) == icon
-    assert duration.state == "26"
+    assert duration.state == "26.1833333333333"
 
     assert float(hass.states.get("sensor.test_distance").state) == pytest.approx(13.682)
-    assert hass.states.get("sensor.test_duration_in_traffic").state == "30"
+    assert hass.states.get("sensor.test_duration_in_traffic").state == "29.6"
     assert hass.states.get("sensor.test_origin").state == "22nd St NW"
     assert (
         hass.states.get("sensor.test_origin").attributes.get(ATTR_LATITUDE)
@@ -501,13 +501,13 @@ async def test_restore_state(hass: HomeAssistant) -> None:
                     "1234",
                     attributes={
                         ATTR_LAST_RESET: last_reset,
-                        ATTR_UNIT_OF_MEASUREMENT: UnitOfTime.MINUTES,
+                        ATTR_UNIT_OF_MEASUREMENT: UnitOfTime.SECONDS,
                         ATTR_STATE_CLASS: SensorStateClass.MEASUREMENT,
                     },
                 ),
                 {
                     "native_value": 1234,
-                    "native_unit_of_measurement": UnitOfTime.MINUTES,
+                    "native_unit_of_measurement": UnitOfTime.SECONDS,
                     "icon": "mdi:car",
                     "last_reset": last_reset,
                 },
@@ -518,13 +518,13 @@ async def test_restore_state(hass: HomeAssistant) -> None:
                     "5678",
                     attributes={
                         ATTR_LAST_RESET: last_reset,
-                        ATTR_UNIT_OF_MEASUREMENT: UnitOfTime.MINUTES,
+                        ATTR_UNIT_OF_MEASUREMENT: UnitOfTime.SECONDS,
                         ATTR_STATE_CLASS: SensorStateClass.MEASUREMENT,
                     },
                 ),
                 {
                     "native_value": 5678,
-                    "native_unit_of_measurement": UnitOfTime.MINUTES,
+                    "native_unit_of_measurement": UnitOfTime.SECONDS,
                     "icon": "mdi:car",
                     "last_reset": last_reset,
                 },
@@ -596,12 +596,12 @@ async def test_restore_state(hass: HomeAssistant) -> None:
 
     # restore from cache
     state = hass.states.get("sensor.test_duration")
-    assert state.state == "1234"
+    assert state.state == "20.5666666666667"
     assert state.attributes.get(ATTR_UNIT_OF_MEASUREMENT) == UnitOfTime.MINUTES
     assert state.attributes.get(ATTR_STATE_CLASS) == SensorStateClass.MEASUREMENT
 
     state = hass.states.get("sensor.test_duration_in_traffic")
-    assert state.state == "5678"
+    assert state.state == "94.6333333333333"
     assert state.attributes.get(ATTR_UNIT_OF_MEASUREMENT) == UnitOfTime.MINUTES
     assert state.attributes.get(ATTR_STATE_CLASS) == SensorStateClass.MEASUREMENT
 
@@ -799,10 +799,12 @@ async def test_multiple_sections(
     await hass.async_block_till_done()
 
     duration = hass.states.get("sensor.test_duration")
-    assert duration.state == "18"
+    assert duration.state == "18.4833333333333"
 
     assert float(hass.states.get("sensor.test_distance").state) == pytest.approx(3.583)
-    assert hass.states.get("sensor.test_duration_in_traffic").state == "18"
+    assert (
+        hass.states.get("sensor.test_duration_in_traffic").state == "18.4833333333333"
+    )
     assert hass.states.get("sensor.test_origin").state == "Chemin de Halage"
     assert (
         hass.states.get("sensor.test_origin").attributes.get(ATTR_LATITUDE)