diff --git a/homeassistant/components/ambient_station/__init__.py b/homeassistant/components/ambient_station/__init__.py
index 12f534eb8e9..d719f9b3728 100644
--- a/homeassistant/components/ambient_station/__init__.py
+++ b/homeassistant/components/ambient_station/__init__.py
@@ -28,6 +28,8 @@ from homeassistant.const import (
     IRRADIATION_WATTS_PER_SQUARE_METER,
     LIGHT_LUX,
     PERCENTAGE,
+    PRECIPITATION_INCHES,
+    PRECIPITATION_INCHES_PER_HOUR,
     PRESSURE_INHG,
     SPEED_MILES_PER_HOUR,
     TEMP_FAHRENHEIT,
@@ -156,7 +158,7 @@ TYPE_WINDSPDMPH_AVG2M = "windspdmph_avg2m"
 TYPE_WINDSPEEDMPH = "windspeedmph"
 TYPE_YEARLYRAININ = "yearlyrainin"
 SENSOR_TYPES = {
-    TYPE_24HOURRAININ: ("24 Hr Rain", "in", SENSOR, None),
+    TYPE_24HOURRAININ: ("24 Hr Rain", PRECIPITATION_INCHES, SENSOR, None),
     TYPE_BAROMABSIN: ("Abs Pressure", PRESSURE_INHG, SENSOR, DEVICE_CLASS_PRESSURE),
     TYPE_BAROMRELIN: ("Rel Pressure", PRESSURE_INHG, SENSOR, DEVICE_CLASS_PRESSURE),
     TYPE_BATT10: ("Battery 10", None, BINARY_SENSOR, DEVICE_CLASS_BATTERY),
@@ -172,11 +174,16 @@ SENSOR_TYPES = {
     TYPE_BATTOUT: ("Battery", None, BINARY_SENSOR, DEVICE_CLASS_BATTERY),
     TYPE_BATT_CO2: ("CO2 Battery", None, BINARY_SENSOR, DEVICE_CLASS_BATTERY),
     TYPE_CO2: ("co2", CONCENTRATION_PARTS_PER_MILLION, SENSOR, DEVICE_CLASS_CO2),
-    TYPE_DAILYRAININ: ("Daily Rain", "in", SENSOR, None),
+    TYPE_DAILYRAININ: ("Daily Rain", PRECIPITATION_INCHES, SENSOR, None),
     TYPE_DEWPOINT: ("Dew Point", TEMP_FAHRENHEIT, SENSOR, DEVICE_CLASS_TEMPERATURE),
-    TYPE_EVENTRAININ: ("Event Rain", "in", SENSOR, None),
+    TYPE_EVENTRAININ: ("Event Rain", PRECIPITATION_INCHES, SENSOR, None),
     TYPE_FEELSLIKE: ("Feels Like", TEMP_FAHRENHEIT, SENSOR, DEVICE_CLASS_TEMPERATURE),
-    TYPE_HOURLYRAININ: ("Hourly Rain Rate", "in/hr", SENSOR, None),
+    TYPE_HOURLYRAININ: (
+        "Hourly Rain Rate",
+        PRECIPITATION_INCHES_PER_HOUR,
+        SENSOR,
+        None,
+    ),
     TYPE_HUMIDITY10: ("Humidity 10", PERCENTAGE, SENSOR, DEVICE_CLASS_HUMIDITY),
     TYPE_HUMIDITY1: ("Humidity 1", PERCENTAGE, SENSOR, DEVICE_CLASS_HUMIDITY),
     TYPE_HUMIDITY2: ("Humidity 2", PERCENTAGE, SENSOR, DEVICE_CLASS_HUMIDITY),
@@ -191,7 +198,7 @@ SENSOR_TYPES = {
     TYPE_HUMIDITYIN: ("Humidity In", PERCENTAGE, SENSOR, DEVICE_CLASS_HUMIDITY),
     TYPE_LASTRAIN: ("Last Rain", None, SENSOR, DEVICE_CLASS_TIMESTAMP),
     TYPE_MAXDAILYGUST: ("Max Gust", SPEED_MILES_PER_HOUR, SENSOR, None),
-    TYPE_MONTHLYRAININ: ("Monthly Rain", "in", SENSOR, None),
+    TYPE_MONTHLYRAININ: ("Monthly Rain", PRECIPITATION_INCHES, SENSOR, None),
     TYPE_PM25_24H: (
         "PM25 24h Avg",
         CONCENTRATION_MICROGRAMS_PER_CUBIC_METER,
@@ -277,9 +284,9 @@ SENSOR_TYPES = {
     TYPE_TEMP9F: ("Temp 9", TEMP_FAHRENHEIT, SENSOR, DEVICE_CLASS_TEMPERATURE),
     TYPE_TEMPF: ("Temp", TEMP_FAHRENHEIT, SENSOR, DEVICE_CLASS_TEMPERATURE),
     TYPE_TEMPINF: ("Inside Temp", TEMP_FAHRENHEIT, SENSOR, DEVICE_CLASS_TEMPERATURE),
-    TYPE_TOTALRAININ: ("Lifetime Rain", "in", SENSOR, None),
+    TYPE_TOTALRAININ: ("Lifetime Rain", PRECIPITATION_INCHES, SENSOR, None),
     TYPE_UV: ("uv", "Index", SENSOR, None),
-    TYPE_WEEKLYRAININ: ("Weekly Rain", "in", SENSOR, None),
+    TYPE_WEEKLYRAININ: ("Weekly Rain", PRECIPITATION_INCHES, SENSOR, None),
     TYPE_WINDDIR: ("Wind Dir", DEGREE, SENSOR, None),
     TYPE_WINDDIR_AVG10M: ("Wind Dir Avg 10m", DEGREE, SENSOR, None),
     TYPE_WINDDIR_AVG2M: ("Wind Dir Avg 2m", SPEED_MILES_PER_HOUR, SENSOR, None),
@@ -288,7 +295,7 @@ SENSOR_TYPES = {
     TYPE_WINDSPDMPH_AVG10M: ("Wind Avg 10m", SPEED_MILES_PER_HOUR, SENSOR, None),
     TYPE_WINDSPDMPH_AVG2M: ("Wind Avg 2m", SPEED_MILES_PER_HOUR, SENSOR, None),
     TYPE_WINDSPEEDMPH: ("Wind Speed", SPEED_MILES_PER_HOUR, SENSOR, None),
-    TYPE_YEARLYRAININ: ("Yearly Rain", "in", SENSOR, None),
+    TYPE_YEARLYRAININ: ("Yearly Rain", PRECIPITATION_INCHES, SENSOR, None),
 }
 
 CONFIG_SCHEMA = cv.deprecated(DOMAIN)
diff --git a/homeassistant/components/arwn/sensor.py b/homeassistant/components/arwn/sensor.py
index 1c95911a19e..2300319f9a4 100644
--- a/homeassistant/components/arwn/sensor.py
+++ b/homeassistant/components/arwn/sensor.py
@@ -7,6 +7,7 @@ from homeassistant.components.sensor import SensorEntity
 from homeassistant.const import (
     DEGREE,
     DEVICE_CLASS_TEMPERATURE,
+    PRECIPITATION_INCHES,
     TEMP_CELSIUS,
     TEMP_FAHRENHEIT,
 )
@@ -44,7 +45,11 @@ def discover_sensors(topic, payload):
     if domain == "rain":
         if len(parts) >= 3 and parts[2] == "today":
             return ArwnSensor(
-                topic, "Rain Since Midnight", "since_midnight", "in", "mdi:water"
+                topic,
+                "Rain Since Midnight",
+                "since_midnight",
+                PRECIPITATION_INCHES,
+                "mdi:water",
             )
         return (
             ArwnSensor(topic + "/total", "Total Rainfall", "total", unit, "mdi:water"),
diff --git a/homeassistant/components/huawei_lte/sensor.py b/homeassistant/components/huawei_lte/sensor.py
index 6554e69d76e..4340d5912c9 100644
--- a/homeassistant/components/huawei_lte/sensor.py
+++ b/homeassistant/components/huawei_lte/sensor.py
@@ -18,6 +18,7 @@ from homeassistant.config_entries import ConfigEntry
 from homeassistant.const import (
     DATA_BYTES,
     DATA_RATE_BYTES_PER_SECOND,
+    FREQUENCY_MEGAHERTZ,
     PERCENTAGE,
     STATE_UNKNOWN,
     TIME_SECONDS,
@@ -192,11 +193,11 @@ SENSOR_META: dict[str | tuple[str, str], SensorMeta] = {
     ),
     (KEY_DEVICE_SIGNAL, "ltedlfreq"): SensorMeta(
         name="Downlink frequency",
-        formatter=lambda x: (round(int(x) / 10), "MHz"),
+        formatter=lambda x: (round(int(x) / 10), FREQUENCY_MEGAHERTZ),
     ),
     (KEY_DEVICE_SIGNAL, "lteulfreq"): SensorMeta(
         name="Uplink frequency",
-        formatter=lambda x: (round(int(x) / 10), "MHz"),
+        formatter=lambda x: (round(int(x) / 10), FREQUENCY_MEGAHERTZ),
     ),
     KEY_MONITORING_CHECK_NOTIFICATIONS: SensorMeta(
         exclude=re.compile(
diff --git a/homeassistant/const.py b/homeassistant/const.py
index 13b94b799db..0b8523bfa6f 100644
--- a/homeassistant/const.py
+++ b/homeassistant/const.py
@@ -452,6 +452,7 @@ LENGTH_MILES: Final = "mi"
 
 # Frequency units
 FREQUENCY_HERTZ: Final = "Hz"
+FREQUENCY_MEGAHERTZ: Final = "MHz"
 FREQUENCY_GIGAHERTZ: Final = "GHz"
 
 # Pressure units
@@ -509,6 +510,8 @@ IRRADIATION_BTUS_PER_HOUR_SQUARE_FOOT: Final = "BTU/(h×ft²)"
 
 # Precipitation units
 PRECIPITATION_MILLIMETERS_PER_HOUR: Final = "mm/h"
+PRECIPITATION_INCHES: Final = "in"
+PRECIPITATION_INCHES_PER_HOUR: Final = "in/h"
 
 # Concentration units
 CONCENTRATION_MICROGRAMS_PER_CUBIC_METER: Final = "µg/m³"