diff --git a/homeassistant/components/alexa/handlers.py b/homeassistant/components/alexa/handlers.py
index c10f7a50369..73410ba06d2 100644
--- a/homeassistant/components/alexa/handlers.py
+++ b/homeassistant/components/alexa/handlers.py
@@ -50,10 +50,9 @@ from homeassistant.const import (
     TEMP_FAHRENHEIT,
 )
 from homeassistant.helpers import network
-import homeassistant.util.color as color_util
+from homeassistant.util import color as color_util, dt as dt_util
 from homeassistant.util.decorator import Registry
-import homeassistant.util.dt as dt_util
-from homeassistant.util.temperature import convert as convert_temperature
+from homeassistant.util.unit_conversion import TemperatureConverter
 
 from .config import AbstractConfig
 from .const import (
@@ -820,7 +819,7 @@ def temperature_from_object(hass, temp_obj, interval=False):
         # convert to Celsius if absolute temperature
         temp -= 273.15
 
-    return convert_temperature(temp, from_unit, to_unit, interval)
+    return TemperatureConverter.convert(temp, from_unit, to_unit, interval=interval)
 
 
 @HANDLERS.register(("Alexa.ThermostatController", "SetTargetTemperature"))
diff --git a/homeassistant/components/citybikes/sensor.py b/homeassistant/components/citybikes/sensor.py
index b9085e24f45..5074378adca 100644
--- a/homeassistant/components/citybikes/sensor.py
+++ b/homeassistant/components/citybikes/sensor.py
@@ -35,7 +35,8 @@ from homeassistant.helpers.entity import async_generate_entity_id
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
 from homeassistant.helpers.event import async_track_time_interval
 from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType
-from homeassistant.util import distance, location
+from homeassistant.util import location
+from homeassistant.util.unit_conversion import DistanceConverter
 
 _LOGGER = logging.getLogger(__name__)
 
@@ -170,7 +171,7 @@ async def async_setup_platform(
     radius = config.get(CONF_RADIUS, 0)
     name = config[CONF_NAME]
     if not hass.config.units.is_metric:
-        radius = distance.convert(radius, LENGTH_FEET, LENGTH_METERS)
+        radius = DistanceConverter.convert(radius, LENGTH_FEET, LENGTH_METERS)
 
     # Create a single instance of CityBikesNetworks.
     networks = hass.data.setdefault(CITYBIKES_NETWORKS, CityBikesNetworks(hass))
diff --git a/homeassistant/components/climate/__init__.py b/homeassistant/components/climate/__init__.py
index 4ed875f2d31..67348d38625 100644
--- a/homeassistant/components/climate/__init__.py
+++ b/homeassistant/components/climate/__init__.py
@@ -31,7 +31,7 @@ from homeassistant.helpers.entity import Entity, EntityDescription
 from homeassistant.helpers.entity_component import EntityComponent
 from homeassistant.helpers.temperature import display_temp as show_temp
 from homeassistant.helpers.typing import ConfigType
-from homeassistant.util.temperature import convert as convert_temperature
+from homeassistant.util.unit_conversion import TemperatureConverter
 
 from .const import (  # noqa: F401
     ATTR_AUX_HEAT,
@@ -560,7 +560,7 @@ class ClimateEntity(Entity):
     def min_temp(self) -> float:
         """Return the minimum temperature."""
         if not hasattr(self, "_attr_min_temp"):
-            return convert_temperature(
+            return TemperatureConverter.convert(
                 DEFAULT_MIN_TEMP, TEMP_CELSIUS, self.temperature_unit
             )
         return self._attr_min_temp
@@ -569,7 +569,7 @@ class ClimateEntity(Entity):
     def max_temp(self) -> float:
         """Return the maximum temperature."""
         if not hasattr(self, "_attr_max_temp"):
-            return convert_temperature(
+            return TemperatureConverter.convert(
                 DEFAULT_MAX_TEMP, TEMP_CELSIUS, self.temperature_unit
             )
         return self._attr_max_temp
@@ -604,7 +604,7 @@ async def async_service_temperature_set(
 
     for value, temp in service_call.data.items():
         if value in CONVERTIBLE_ATTRIBUTE:
-            kwargs[value] = convert_temperature(
+            kwargs[value] = TemperatureConverter.convert(
                 temp, hass.config.units.temperature_unit, entity.temperature_unit
             )
         else:
diff --git a/homeassistant/components/ecobee/climate.py b/homeassistant/components/ecobee/climate.py
index c5490c55850..16870d76902 100644
--- a/homeassistant/components/ecobee/climate.py
+++ b/homeassistant/components/ecobee/climate.py
@@ -33,7 +33,7 @@ from homeassistant.helpers import entity_platform
 import homeassistant.helpers.config_validation as cv
 from homeassistant.helpers.entity import DeviceInfo
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
-from homeassistant.util.temperature import convert
+from homeassistant.util.unit_conversion import TemperatureConverter
 
 from .const import _LOGGER, DOMAIN, ECOBEE_MODEL_TO_NAME, MANUFACTURER
 from .util import ecobee_date, ecobee_time
@@ -763,12 +763,12 @@ class Thermostat(ClimateEntity):
     def create_vacation(self, service_data):
         """Create a vacation with user-specified parameters."""
         vacation_name = service_data[ATTR_VACATION_NAME]
-        cool_temp = convert(
+        cool_temp = TemperatureConverter.convert(
             service_data[ATTR_COOL_TEMP],
             self.hass.config.units.temperature_unit,
             TEMP_FAHRENHEIT,
         )
-        heat_temp = convert(
+        heat_temp = TemperatureConverter.convert(
             service_data[ATTR_HEAT_TEMP],
             self.hass.config.units.temperature_unit,
             TEMP_FAHRENHEIT,
diff --git a/homeassistant/components/life360/coordinator.py b/homeassistant/components/life360/coordinator.py
index 3bee1b5827e..edb86e9727a 100644
--- a/homeassistant/components/life360/coordinator.py
+++ b/homeassistant/components/life360/coordinator.py
@@ -21,8 +21,8 @@ from homeassistant.core import HomeAssistant
 from homeassistant.exceptions import ConfigEntryAuthFailed
 from homeassistant.helpers.aiohttp_client import async_get_clientsession
 from homeassistant.helpers.update_coordinator import DataUpdateCoordinator, UpdateFailed
-from homeassistant.util.distance import convert
-import homeassistant.util.dt as dt_util
+from homeassistant.util import dt as dt_util
+from homeassistant.util.unit_conversion import DistanceConverter
 
 from .const import (
     COMM_TIMEOUT,
@@ -207,7 +207,9 @@ class Life360DataUpdateCoordinator(DataUpdateCoordinator[Life360Data]):
 
                 speed = max(0, float(loc["speed"]) * SPEED_FACTOR_MPH)
                 if self._hass.config.units.is_metric:
-                    speed = convert(speed, LENGTH_MILES, LENGTH_KILOMETERS)
+                    speed = DistanceConverter.convert(
+                        speed, LENGTH_MILES, LENGTH_KILOMETERS
+                    )
 
                 data.members[member_id] = Life360Member(
                     address,
@@ -218,7 +220,11 @@ class Life360DataUpdateCoordinator(DataUpdateCoordinator[Life360Data]):
                     member["avatar"],
                     # Life360 reports accuracy in feet, but Device Tracker expects
                     # gps_accuracy in meters.
-                    round(convert(float(loc["accuracy"]), LENGTH_FEET, LENGTH_METERS)),
+                    round(
+                        DistanceConverter.convert(
+                            float(loc["accuracy"]), LENGTH_FEET, LENGTH_METERS
+                        )
+                    ),
                     dt_util.utc_from_timestamp(int(loc["timestamp"])),
                     float(loc["latitude"]),
                     float(loc["longitude"]),
diff --git a/homeassistant/components/met/__init__.py b/homeassistant/components/met/__init__.py
index b4889a62411..2857c057482 100644
--- a/homeassistant/components/met/__init__.py
+++ b/homeassistant/components/met/__init__.py
@@ -24,8 +24,8 @@ from homeassistant.core import Event, HomeAssistant
 from homeassistant.exceptions import HomeAssistantError
 from homeassistant.helpers.aiohttp_client import async_get_clientsession
 from homeassistant.helpers.update_coordinator import DataUpdateCoordinator, UpdateFailed
-from homeassistant.util.distance import convert as convert_distance
-import homeassistant.util.dt as dt_util
+from homeassistant.util import dt as dt_util
+from homeassistant.util.unit_conversion import DistanceConverter
 
 from .const import (
     CONF_TRACK_HOME,
@@ -160,7 +160,7 @@ class MetWeatherData:
 
         if not self._is_metric:
             elevation = int(
-                round(convert_distance(elevation, LENGTH_FEET, LENGTH_METERS))
+                round(DistanceConverter.convert(elevation, LENGTH_FEET, LENGTH_METERS))
             )
 
         coordinates = {
diff --git a/homeassistant/components/nws/sensor.py b/homeassistant/components/nws/sensor.py
index ec53d909561..1e062bf3d36 100644
--- a/homeassistant/components/nws/sensor.py
+++ b/homeassistant/components/nws/sensor.py
@@ -17,10 +17,12 @@ from homeassistant.core import HomeAssistant
 from homeassistant.helpers.entity import DeviceInfo
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
 from homeassistant.helpers.update_coordinator import CoordinatorEntity
-from homeassistant.util.distance import convert as convert_distance
 from homeassistant.util.dt import utcnow
-from homeassistant.util.pressure import convert as convert_pressure
-from homeassistant.util.speed import convert as convert_speed
+from homeassistant.util.unit_conversion import (
+    DistanceConverter,
+    PressureConverter,
+    SpeedConverter,
+)
 
 from . import base_unique_id, device_info
 from .const import (
@@ -91,12 +93,16 @@ class NWSSensor(CoordinatorEntity, SensorEntity):
         unit_of_measurement = self.native_unit_of_measurement
         if unit_of_measurement == SPEED_MILES_PER_HOUR:
             return round(
-                convert_speed(value, SPEED_KILOMETERS_PER_HOUR, SPEED_MILES_PER_HOUR)
+                SpeedConverter.convert(
+                    value, SPEED_KILOMETERS_PER_HOUR, SPEED_MILES_PER_HOUR
+                )
             )
         if unit_of_measurement == LENGTH_MILES:
-            return round(convert_distance(value, LENGTH_METERS, LENGTH_MILES))
+            return round(DistanceConverter.convert(value, LENGTH_METERS, LENGTH_MILES))
         if unit_of_measurement == PRESSURE_INHG:
-            return round(convert_pressure(value, PRESSURE_PA, PRESSURE_INHG), 2)
+            return round(
+                PressureConverter.convert(value, PRESSURE_PA, PRESSURE_INHG), 2
+            )
         if unit_of_measurement == TEMP_CELSIUS:
             return round(value, 1)
         if unit_of_measurement == PERCENTAGE:
diff --git a/homeassistant/components/nws/weather.py b/homeassistant/components/nws/weather.py
index eb6f7a4f39d..4684714d58c 100644
--- a/homeassistant/components/nws/weather.py
+++ b/homeassistant/components/nws/weather.py
@@ -25,8 +25,7 @@ from homeassistant.core import HomeAssistant, callback
 from homeassistant.helpers.entity import DeviceInfo
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
 from homeassistant.util.dt import utcnow
-from homeassistant.util.speed import convert as convert_speed
-from homeassistant.util.temperature import convert as convert_temperature
+from homeassistant.util.unit_conversion import SpeedConverter, TemperatureConverter
 
 from . import base_unique_id, device_info
 from .const import (
@@ -235,7 +234,7 @@ class NWSWeather(WeatherEntity):
             }
 
             if (temp := forecast_entry.get("temperature")) is not None:
-                data[ATTR_FORECAST_NATIVE_TEMP] = convert_temperature(
+                data[ATTR_FORECAST_NATIVE_TEMP] = TemperatureConverter.convert(
                     temp, TEMP_FAHRENHEIT, TEMP_CELSIUS
                 )
             else:
@@ -255,7 +254,7 @@ class NWSWeather(WeatherEntity):
             data[ATTR_FORECAST_WIND_BEARING] = forecast_entry.get("windBearing")
             wind_speed = forecast_entry.get("windSpeedAvg")
             if wind_speed is not None:
-                data[ATTR_FORECAST_NATIVE_WIND_SPEED] = convert_speed(
+                data[ATTR_FORECAST_NATIVE_WIND_SPEED] = SpeedConverter.convert(
                     wind_speed, SPEED_MILES_PER_HOUR, SPEED_KILOMETERS_PER_HOUR
                 )
             else:
diff --git a/homeassistant/components/opensky/sensor.py b/homeassistant/components/opensky/sensor.py
index 1b480e997d8..66579eb8173 100644
--- a/homeassistant/components/opensky/sensor.py
+++ b/homeassistant/components/opensky/sensor.py
@@ -22,7 +22,8 @@ from homeassistant.core import HomeAssistant
 import homeassistant.helpers.config_validation as cv
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
 from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType
-from homeassistant.util import distance as util_distance, location as util_location
+from homeassistant.util import location as util_location
+from homeassistant.util.unit_conversion import DistanceConverter
 
 CONF_ALTITUDE = "altitude"
 
@@ -105,7 +106,9 @@ class OpenSkySensor(SensorEntity):
         self._session = requests.Session()
         self._latitude = latitude
         self._longitude = longitude
-        self._radius = util_distance.convert(radius, LENGTH_KILOMETERS, LENGTH_METERS)
+        self._radius = DistanceConverter.convert(
+            radius, LENGTH_KILOMETERS, LENGTH_METERS
+        )
         self._altitude = altitude
         self._state = 0
         self._hass = hass
diff --git a/homeassistant/components/openweathermap/weather_update_coordinator.py b/homeassistant/components/openweathermap/weather_update_coordinator.py
index 98c3b56fb5e..b5435c92680 100644
--- a/homeassistant/components/openweathermap/weather_update_coordinator.py
+++ b/homeassistant/components/openweathermap/weather_update_coordinator.py
@@ -12,7 +12,7 @@ from homeassistant.components.weather import (
 from homeassistant.helpers import sun
 from homeassistant.helpers.update_coordinator import DataUpdateCoordinator, UpdateFailed
 from homeassistant.util import dt
-from homeassistant.util.temperature import kelvin_to_celsius
+from homeassistant.util.unit_conversion import TemperatureConverter
 
 from .const import (
     ATTR_API_CLOUDS,
@@ -191,7 +191,7 @@ class WeatherUpdateCoordinator(DataUpdateCoordinator):
     def _fmt_dewpoint(dewpoint):
         """Format the dewpoint data."""
         if dewpoint is not None:
-            return round(kelvin_to_celsius(dewpoint), 1)
+            return round(TemperatureConverter.kelvin_to_celsius(dewpoint), 1)
         return None
 
     @staticmethod
diff --git a/homeassistant/components/prometheus/__init__.py b/homeassistant/components/prometheus/__init__.py
index d247af922d3..e5dcebd3ca9 100644
--- a/homeassistant/components/prometheus/__init__.py
+++ b/homeassistant/components/prometheus/__init__.py
@@ -40,7 +40,7 @@ import homeassistant.helpers.config_validation as cv
 from homeassistant.helpers.entity_registry import EVENT_ENTITY_REGISTRY_UPDATED
 from homeassistant.helpers.entity_values import EntityValues
 from homeassistant.helpers.typing import ConfigType
-from homeassistant.util.temperature import fahrenheit_to_celsius
+from homeassistant.util.unit_conversion import TemperatureConverter
 
 _LOGGER = logging.getLogger(__name__)
 
@@ -348,7 +348,7 @@ class PrometheusMetrics:
         with suppress(ValueError):
             value = self.state_as_number(state)
             if state.attributes.get(ATTR_UNIT_OF_MEASUREMENT) == TEMP_FAHRENHEIT:
-                value = fahrenheit_to_celsius(value)
+                value = TemperatureConverter.fahrenheit_to_celsius(value)
             metric.labels(**self._labels(state)).set(value)
 
     def _handle_device_tracker(self, state):
@@ -394,7 +394,7 @@ class PrometheusMetrics:
     def _handle_climate_temp(self, state, attr, metric_name, metric_description):
         if temp := state.attributes.get(attr):
             if self._climate_units == TEMP_FAHRENHEIT:
-                temp = fahrenheit_to_celsius(temp)
+                temp = TemperatureConverter.fahrenheit_to_celsius(temp)
             metric = self._metric(
                 metric_name,
                 self.prometheus_cli.Gauge,
@@ -507,7 +507,7 @@ class PrometheusMetrics:
             try:
                 value = self.state_as_number(state)
                 if state.attributes.get(ATTR_UNIT_OF_MEASUREMENT) == TEMP_FAHRENHEIT:
-                    value = fahrenheit_to_celsius(value)
+                    value = TemperatureConverter.fahrenheit_to_celsius(value)
                 _metric.labels(**self._labels(state)).set(value)
             except ValueError:
                 pass
diff --git a/homeassistant/components/proximity/__init__.py b/homeassistant/components/proximity/__init__.py
index 7a54b11ef34..cf99f4fa503 100644
--- a/homeassistant/components/proximity/__init__.py
+++ b/homeassistant/components/proximity/__init__.py
@@ -22,8 +22,8 @@ import homeassistant.helpers.config_validation as cv
 from homeassistant.helpers.entity import Entity
 from homeassistant.helpers.event import track_state_change
 from homeassistant.helpers.typing import ConfigType
-from homeassistant.util.distance import convert
 from homeassistant.util.location import distance
+from homeassistant.util.unit_conversion import DistanceConverter
 
 _LOGGER = logging.getLogger(__name__)
 
@@ -235,7 +235,10 @@ class Proximity(Entity):
             if not proximity:
                 continue
             distances_to_zone[device] = round(
-                convert(proximity, LENGTH_METERS, self.unit_of_measurement), 1
+                DistanceConverter.convert(
+                    proximity, LENGTH_METERS, self.unit_of_measurement
+                ),
+                1,
             )
 
         # Loop through each of the distances collected and work out the
diff --git a/homeassistant/components/sensibo/climate.py b/homeassistant/components/sensibo/climate.py
index 36047fe0ddd..9c3c5c111f5 100644
--- a/homeassistant/components/sensibo/climate.py
+++ b/homeassistant/components/sensibo/climate.py
@@ -23,7 +23,7 @@ from homeassistant.core import HomeAssistant
 from homeassistant.exceptions import HomeAssistantError
 from homeassistant.helpers import config_validation as cv, entity_platform
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
-from homeassistant.util.temperature import convert as convert_temperature
+from homeassistant.util.unit_conversion import TemperatureConverter
 
 from .const import DOMAIN
 from .coordinator import SensiboDataUpdateCoordinator
@@ -169,7 +169,7 @@ class SensiboClimate(SensiboDeviceBaseEntity, ClimateEntity):
     def current_temperature(self) -> float | None:
         """Return the current temperature."""
         if self.device_data.temp:
-            return convert_temperature(
+            return TemperatureConverter.convert(
                 self.device_data.temp,
                 TEMP_CELSIUS,
                 self.temperature_unit,
diff --git a/homeassistant/components/smarttub/climate.py b/homeassistant/components/smarttub/climate.py
index 758cffe7fa8..0afebbd6433 100644
--- a/homeassistant/components/smarttub/climate.py
+++ b/homeassistant/components/smarttub/climate.py
@@ -17,7 +17,7 @@ from homeassistant.config_entries import ConfigEntry
 from homeassistant.const import ATTR_TEMPERATURE, TEMP_CELSIUS
 from homeassistant.core import HomeAssistant
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
-from homeassistant.util.temperature import convert as convert_temperature
+from homeassistant.util.unit_conversion import TemperatureConverter
 
 from .const import DEFAULT_MAX_TEMP, DEFAULT_MIN_TEMP, DOMAIN, SMARTTUB_CONTROLLER
 from .entity import SmartTubEntity
@@ -87,13 +87,17 @@ class SmartTubThermostat(SmartTubEntity, ClimateEntity):
     def min_temp(self):
         """Return the minimum temperature."""
         min_temp = DEFAULT_MIN_TEMP
-        return convert_temperature(min_temp, TEMP_CELSIUS, self.temperature_unit)
+        return TemperatureConverter.convert(
+            min_temp, TEMP_CELSIUS, self.temperature_unit
+        )
 
     @property
     def max_temp(self):
         """Return the maximum temperature."""
         max_temp = DEFAULT_MAX_TEMP
-        return convert_temperature(max_temp, TEMP_CELSIUS, self.temperature_unit)
+        return TemperatureConverter.convert(
+            max_temp, TEMP_CELSIUS, self.temperature_unit
+        )
 
     @property
     def preset_mode(self):
diff --git a/homeassistant/components/subaru/sensor.py b/homeassistant/components/subaru/sensor.py
index ba96902f6fb..f1a1ea96382 100644
--- a/homeassistant/components/subaru/sensor.py
+++ b/homeassistant/components/subaru/sensor.py
@@ -20,14 +20,13 @@ from homeassistant.const import (
 )
 from homeassistant.core import HomeAssistant
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
-from homeassistant.util.distance import convert as dist_convert
+from homeassistant.util.unit_conversion import DistanceConverter, VolumeConverter
 from homeassistant.util.unit_system import (
     IMPERIAL_SYSTEM,
     LENGTH_UNITS,
     PRESSURE_UNITS,
     TEMPERATURE_UNITS,
 )
-from homeassistant.util.volume import convert as vol_convert
 
 from .const import (
     API_GEN_2,
@@ -42,8 +41,8 @@ from .const import (
 )
 from .entity import SubaruEntity
 
-L_PER_GAL = vol_convert(1, VOLUME_GALLONS, VOLUME_LITERS)
-KM_PER_MI = dist_convert(1, LENGTH_MILES, LENGTH_KILOMETERS)
+L_PER_GAL = VolumeConverter.convert(1, VOLUME_GALLONS, VOLUME_LITERS)
+KM_PER_MI = DistanceConverter.convert(1, LENGTH_MILES, LENGTH_KILOMETERS)
 
 # Fuel Economy Constants
 FUEL_CONSUMPTION_L_PER_100KM = "L/100km"
diff --git a/homeassistant/components/tomorrowio/sensor.py b/homeassistant/components/tomorrowio/sensor.py
index ea114af0544..b2179cd60f5 100644
--- a/homeassistant/components/tomorrowio/sensor.py
+++ b/homeassistant/components/tomorrowio/sensor.py
@@ -38,8 +38,7 @@ from homeassistant.const import (
 from homeassistant.core import HomeAssistant
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
 from homeassistant.util import slugify
-from homeassistant.util.distance import convert as distance_convert
-from homeassistant.util.speed import convert as speed_convert
+from homeassistant.util.unit_conversion import DistanceConverter, SpeedConverter
 
 from . import TomorrowioDataUpdateCoordinator, TomorrowioEntity
 from .const import (
@@ -135,7 +134,7 @@ SENSOR_TYPES = (
         name="Cloud Base",
         unit_imperial=LENGTH_MILES,
         unit_metric=LENGTH_KILOMETERS,
-        imperial_conversion=lambda val: distance_convert(
+        imperial_conversion=lambda val: DistanceConverter.convert(
             val, LENGTH_KILOMETERS, LENGTH_MILES
         ),
     ),
@@ -145,7 +144,7 @@ SENSOR_TYPES = (
         name="Cloud Ceiling",
         unit_imperial=LENGTH_MILES,
         unit_metric=LENGTH_KILOMETERS,
-        imperial_conversion=lambda val: distance_convert(
+        imperial_conversion=lambda val: DistanceConverter.convert(
             val, LENGTH_KILOMETERS, LENGTH_MILES
         ),
     ),
@@ -160,7 +159,7 @@ SENSOR_TYPES = (
         name="Wind Gust",
         unit_imperial=SPEED_MILES_PER_HOUR,
         unit_metric=SPEED_METERS_PER_SECOND,
-        imperial_conversion=lambda val: speed_convert(
+        imperial_conversion=lambda val: SpeedConverter.convert(
             val, SPEED_METERS_PER_SECOND, SPEED_MILES_PER_HOUR
         ),
     ),
diff --git a/homeassistant/components/water_heater/__init__.py b/homeassistant/components/water_heater/__init__.py
index 8881b3babd4..4712d4a2701 100644
--- a/homeassistant/components/water_heater/__init__.py
+++ b/homeassistant/components/water_heater/__init__.py
@@ -34,7 +34,7 @@ from homeassistant.helpers.entity import Entity, EntityDescription
 from homeassistant.helpers.entity_component import EntityComponent
 from homeassistant.helpers.temperature import display_temp as show_temp
 from homeassistant.helpers.typing import ConfigType
-from homeassistant.util.temperature import convert as convert_temperature
+from homeassistant.util.unit_conversion import TemperatureConverter
 
 DEFAULT_MIN_TEMP = 110
 DEFAULT_MAX_TEMP = 140
@@ -328,7 +328,7 @@ class WaterHeaterEntity(Entity):
         """Return the minimum temperature."""
         if hasattr(self, "_attr_min_temp"):
             return self._attr_min_temp
-        return convert_temperature(
+        return TemperatureConverter.convert(
             DEFAULT_MIN_TEMP, TEMP_FAHRENHEIT, self.temperature_unit
         )
 
@@ -337,7 +337,7 @@ class WaterHeaterEntity(Entity):
         """Return the maximum temperature."""
         if hasattr(self, "_attr_max_temp"):
             return self._attr_max_temp
-        return convert_temperature(
+        return TemperatureConverter.convert(
             DEFAULT_MAX_TEMP, TEMP_FAHRENHEIT, self.temperature_unit
         )
 
@@ -361,7 +361,7 @@ async def async_service_temperature_set(
 
     for value, temp in service.data.items():
         if value in CONVERTIBLE_ATTRIBUTE:
-            kwargs[value] = convert_temperature(
+            kwargs[value] = TemperatureConverter.convert(
                 temp, hass.config.units.temperature_unit, entity.temperature_unit
             )
         else:
diff --git a/homeassistant/components/zwave_js/climate.py b/homeassistant/components/zwave_js/climate.py
index 264bb5e6ee8..07119d365e0 100644
--- a/homeassistant/components/zwave_js/climate.py
+++ b/homeassistant/components/zwave_js/climate.py
@@ -43,7 +43,7 @@ from homeassistant.const import (
 from homeassistant.core import HomeAssistant, callback
 from homeassistant.helpers.dispatcher import async_dispatcher_connect
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
-from homeassistant.util.temperature import convert as convert_temperature
+from homeassistant.util.unit_conversion import TemperatureConverter
 
 from .const import DATA_CLIENT, DOMAIN
 from .discovery import ZwaveDiscoveryInfo
@@ -388,7 +388,7 @@ class ZWaveClimate(ZWaveBaseEntity, ClimateEntity):
         except (IndexError, ValueError, TypeError):
             pass
 
-        return convert_temperature(min_temp, base_unit, self.temperature_unit)
+        return TemperatureConverter.convert(min_temp, base_unit, self.temperature_unit)
 
     @property
     def max_temp(self) -> float:
@@ -404,7 +404,7 @@ class ZWaveClimate(ZWaveBaseEntity, ClimateEntity):
         except (IndexError, ValueError, TypeError):
             pass
 
-        return convert_temperature(max_temp, base_unit, self.temperature_unit)
+        return TemperatureConverter.convert(max_temp, base_unit, self.temperature_unit)
 
     async def async_set_fan_mode(self, fan_mode: str) -> None:
         """Set new target fan mode."""
diff --git a/homeassistant/helpers/temperature.py b/homeassistant/helpers/temperature.py
index e0f089e93b9..5a35f1bee13 100644
--- a/homeassistant/helpers/temperature.py
+++ b/homeassistant/helpers/temperature.py
@@ -5,7 +5,7 @@ from numbers import Number
 
 from homeassistant.const import PRECISION_HALVES, PRECISION_TENTHS
 from homeassistant.core import HomeAssistant
-from homeassistant.util.temperature import convert as convert_temperature
+from homeassistant.util.unit_conversion import TemperatureConverter
 
 
 def display_temp(
@@ -24,7 +24,9 @@ def display_temp(
         raise TypeError(f"Temperature is not a number: {temperature}")
 
     if temperature_unit != ha_unit:
-        temperature = convert_temperature(temperature, temperature_unit, ha_unit)
+        temperature = TemperatureConverter.convert(
+            temperature, temperature_unit, ha_unit
+        )
 
     # Round in the units appropriate
     if precision == PRECISION_HALVES: