diff --git a/homeassistant/components/tessie/sensor.py b/homeassistant/components/tessie/sensor.py
index 7ed1b0416e3..07f54ebde5b 100644
--- a/homeassistant/components/tessie/sensor.py
+++ b/homeassistant/components/tessie/sensor.py
@@ -3,6 +3,7 @@ from __future__ import annotations
 
 from collections.abc import Callable
 from dataclasses import dataclass
+from datetime import datetime, timedelta
 
 from homeassistant.components.sensor import (
     SensorDeviceClass,
@@ -24,20 +25,29 @@ from homeassistant.const import (
     UnitOfTemperature,
     UnitOfTime,
 )
-from homeassistant.core import HomeAssistant
+from homeassistant.core import HomeAssistant, callback
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
 from homeassistant.helpers.typing import StateType
+from homeassistant.util import dt as dt_util
 
 from .const import DOMAIN
 from .coordinator import TessieStateUpdateCoordinator
 from .entity import TessieEntity
 
 
+@callback
+def hours_to_datetime(value: StateType) -> datetime | None:
+    """Convert relative hours into absolute datetime."""
+    if isinstance(value, (int, float)) and value > 0:
+        return dt_util.now() + timedelta(minutes=value)
+    return None
+
+
 @dataclass(frozen=True, kw_only=True)
 class TessieSensorEntityDescription(SensorEntityDescription):
     """Describes Tessie Sensor entity."""
 
-    value_fn: Callable[[StateType], StateType] = lambda x: x
+    value_fn: Callable[[StateType], StateType | datetime] = lambda x: x
 
 
 DESCRIPTIONS: tuple[TessieSensorEntityDescription, ...] = (
@@ -81,6 +91,12 @@ DESCRIPTIONS: tuple[TessieSensorEntityDescription, ...] = (
         device_class=SensorDeviceClass.SPEED,
         entity_category=EntityCategory.DIAGNOSTIC,
     ),
+    TessieSensorEntityDescription(
+        key="charge_state_minutes_to_full_charge",
+        device_class=SensorDeviceClass.TIMESTAMP,
+        entity_category=EntityCategory.DIAGNOSTIC,
+        value_fn=hours_to_datetime,
+    ),
     TessieSensorEntityDescription(
         key="charge_state_battery_range",
         state_class=SensorStateClass.MEASUREMENT,
@@ -243,6 +259,6 @@ class TessieSensorEntity(TessieEntity, SensorEntity):
         self.entity_description = description
 
     @property
-    def native_value(self) -> StateType:
+    def native_value(self) -> StateType | datetime:
         """Return the state of the sensor."""
         return self.entity_description.value_fn(self.get())
diff --git a/homeassistant/components/tessie/strings.json b/homeassistant/components/tessie/strings.json
index d8ccf47bb73..1f0a42bb781 100644
--- a/homeassistant/components/tessie/strings.json
+++ b/homeassistant/components/tessie/strings.json
@@ -88,6 +88,9 @@
       "charge_state_battery_range": {
         "name": "Battery range"
       },
+      "charge_state_minutes_to_full_charge": {
+        "name": "Time to full charge"
+      },
       "drive_state_speed": {
         "name": "Speed"
       },
diff --git a/tests/components/tessie/fixtures/vehicles.json b/tests/components/tessie/fixtures/vehicles.json
index c1b0851eee6..359e23f9cdd 100644
--- a/tests/components/tessie/fixtures/vehicles.json
+++ b/tests/components/tessie/fixtures/vehicles.json
@@ -62,7 +62,7 @@
           "fast_charger_type": "ACSingleWireCAN",
           "ideal_battery_range": 263.68,
           "max_range_charge_counter": 0,
-          "minutes_to_full_charge": 30,
+          "minutes_to_full_charge": 0,
           "not_enough_power_to_heat": null,
           "off_peak_charging_enabled": false,
           "off_peak_charging_times": "all_week",
@@ -77,7 +77,7 @@
           "scheduled_departure_time": 1694899800,
           "scheduled_departure_time_minutes": 450,
           "supercharger_session_trip_planner": false,
-          "time_to_full_charge": 0.5,
+          "time_to_full_charge": 0,
           "timestamp": 1701139037461,
           "trip_charging": false,
           "usable_battery_level": 75,