diff --git a/homeassistant/components/sensor/__init__.py b/homeassistant/components/sensor/__init__.py
index f7fbecea224..3c158f1be9c 100644
--- a/homeassistant/components/sensor/__init__.py
+++ b/homeassistant/components/sensor/__init__.py
@@ -266,7 +266,7 @@ class SensorDeviceClass(StrEnum):
     SPEED = "speed"
     """Generic speed.
 
-    Unit of measurement: `SPEED_*` units
+    Unit of measurement: `SPEED_*` or `PRECIPITATION_INTENSITY_*` units
     - SI /metric: `mm/d`, `mm/h`, `m/s`, `km/h`
     - USCS / imperial: `in/d`, `in/h`, `ft/s`, `mph`
     - Nautical: `kn`
diff --git a/homeassistant/const.py b/homeassistant/const.py
index 99af9974ea0..49749c1b5e5 100644
--- a/homeassistant/const.py
+++ b/homeassistant/const.py
@@ -525,11 +525,15 @@ TIME_YEARS: Final = "y"
 
 # Length units
 LENGTH_MILLIMETERS: Final = "mm"
+"""Note: for precipitation, please use PRECIPITATION_MILLIMETERS"""
+
 LENGTH_CENTIMETERS: Final = "cm"
 LENGTH_METERS: Final = "m"
 LENGTH_KILOMETERS: Final = "km"
 
 LENGTH_INCHES: Final = "in"
+"""Note: for precipitation, please use PRECIPITATION_INCHES"""
+
 LENGTH_FEET: Final = "ft"
 LENGTH_YARD: Final = "yd"
 LENGTH_MILES: Final = "mi"
@@ -602,10 +606,25 @@ REVOLUTIONS_PER_MINUTE: Final = "rpm"
 IRRADIATION_WATTS_PER_SQUARE_METER: Final = "W/m²"
 IRRADIATION_BTUS_PER_HOUR_SQUARE_FOOT: Final = "BTU/(h×ft²)"
 
+# Precipitation intensity units
+# The derivation of these units is a volume of rain amassing in a container
+# with constant cross section in a given time
+PRECIPITATION_INTENSITY_INCHES_PER_DAY: Final = "in/d"
+PRECIPITATION_INTENSITY_INCHES_PER_HOUR: Final = "in/h"
+PRECIPITATION_INTENSITY_MILLIMETERS_PER_DAY: Final = "mm/d"
+PRECIPITATION_INTENSITY_MILLIMETERS_PER_HOUR: Final = "mm/h"
+
 # Precipitation units
-PRECIPITATION_MILLIMETERS_PER_HOUR: Final = "mm/h"
+# The derivation of these units is a volume of rain amassing in a container
+# with constant cross section
 PRECIPITATION_INCHES: Final = "in"
+PRECIPITATION_MILLIMETERS: Final = "mm"
+
+PRECIPITATION_MILLIMETERS_PER_HOUR: Final = "mm/h"
+"""Deprecated: please use PRECIPITATION_INTENSITY_MILLIMETERS_PER_HOUR"""
+
 PRECIPITATION_INCHES_PER_HOUR: Final = "in/h"
+"""Deprecated: please use PRECIPITATION_INTENSITY_INCHES_PER_HOUR"""
 
 # Concentration units
 CONCENTRATION_MICROGRAMS_PER_CUBIC_METER: Final = "µg/m³"
@@ -616,15 +635,22 @@ CONCENTRATION_PARTS_PER_MILLION: Final = "ppm"
 CONCENTRATION_PARTS_PER_BILLION: Final = "ppb"
 
 # Speed units
-SPEED_MILLIMETERS_PER_DAY: Final = "mm/d"
 SPEED_FEET_PER_SECOND: Final = "ft/s"
-SPEED_INCHES_PER_DAY: Final = "in/d"
 SPEED_METERS_PER_SECOND: Final = "m/s"
-SPEED_INCHES_PER_HOUR: Final = "in/h"
 SPEED_KILOMETERS_PER_HOUR: Final = "km/h"
 SPEED_KNOTS: Final = "kn"
 SPEED_MILES_PER_HOUR: Final = "mph"
 
+SPEED_MILLIMETERS_PER_DAY: Final = "mm/d"
+"""Deprecated: please use PRECIPITATION_INTENSITY_MILLIMETERS_PER_DAY"""
+
+SPEED_INCHES_PER_DAY: Final = "in/d"
+"""Deprecated: please use PRECIPITATION_INTENSITY_INCHES_PER_DAY"""
+
+SPEED_INCHES_PER_HOUR: Final = "in/h"
+"""Deprecated: please use PRECIPITATION_INTENSITY_INCHES_PER_HOUR"""
+
+
 # Signal_strength units
 SIGNAL_STRENGTH_DECIBELS: Final = "dB"
 SIGNAL_STRENGTH_DECIBELS_MILLIWATT: Final = "dBm"
diff --git a/homeassistant/util/unit_conversion.py b/homeassistant/util/unit_conversion.py
index 9aa3084887e..0bf895f34a0 100644
--- a/homeassistant/util/unit_conversion.py
+++ b/homeassistant/util/unit_conversion.py
@@ -21,6 +21,10 @@ from homeassistant.const import (
     MASS_POUNDS,
     POWER_KILO_WATT,
     POWER_WATT,
+    PRECIPITATION_INTENSITY_INCHES_PER_DAY,
+    PRECIPITATION_INTENSITY_INCHES_PER_HOUR,
+    PRECIPITATION_INTENSITY_MILLIMETERS_PER_DAY,
+    PRECIPITATION_INTENSITY_MILLIMETERS_PER_HOUR,
     PRESSURE_BAR,
     PRESSURE_CBAR,
     PRESSURE_HPA,
@@ -31,13 +35,10 @@ from homeassistant.const import (
     PRESSURE_PA,
     PRESSURE_PSI,
     SPEED_FEET_PER_SECOND,
-    SPEED_INCHES_PER_DAY,
-    SPEED_INCHES_PER_HOUR,
     SPEED_KILOMETERS_PER_HOUR,
     SPEED_KNOTS,
     SPEED_METERS_PER_SECOND,
     SPEED_MILES_PER_HOUR,
-    SPEED_MILLIMETERS_PER_DAY,
     TEMP_CELSIUS,
     TEMP_FAHRENHEIT,
     TEMP_KELVIN,
@@ -238,24 +239,26 @@ class SpeedConverter(BaseUnitConverter):
     UNIT_CLASS = "speed"
     NORMALIZED_UNIT = SPEED_METERS_PER_SECOND
     _UNIT_CONVERSION: dict[str, float] = {
+        PRECIPITATION_INTENSITY_INCHES_PER_DAY: _DAYS_TO_SECS / _IN_TO_M,
+        PRECIPITATION_INTENSITY_INCHES_PER_HOUR: _HRS_TO_SECS / _IN_TO_M,
+        PRECIPITATION_INTENSITY_MILLIMETERS_PER_DAY: _DAYS_TO_SECS / _MM_TO_M,
+        PRECIPITATION_INTENSITY_MILLIMETERS_PER_HOUR: _HRS_TO_SECS / _MM_TO_M,
         SPEED_FEET_PER_SECOND: 1 / _FOOT_TO_M,
-        SPEED_INCHES_PER_DAY: _DAYS_TO_SECS / _IN_TO_M,
-        SPEED_INCHES_PER_HOUR: _HRS_TO_SECS / _IN_TO_M,
         SPEED_KILOMETERS_PER_HOUR: _HRS_TO_SECS / _KM_TO_M,
         SPEED_KNOTS: _HRS_TO_SECS / _NAUTICAL_MILE_TO_M,
         SPEED_METERS_PER_SECOND: 1,
         SPEED_MILES_PER_HOUR: _HRS_TO_SECS / _MILE_TO_M,
-        SPEED_MILLIMETERS_PER_DAY: _DAYS_TO_SECS / _MM_TO_M,
     }
     VALID_UNITS = {
+        PRECIPITATION_INTENSITY_INCHES_PER_DAY,
+        PRECIPITATION_INTENSITY_INCHES_PER_HOUR,
+        PRECIPITATION_INTENSITY_MILLIMETERS_PER_DAY,
+        PRECIPITATION_INTENSITY_MILLIMETERS_PER_HOUR,
         SPEED_FEET_PER_SECOND,
-        SPEED_INCHES_PER_DAY,
-        SPEED_INCHES_PER_HOUR,
         SPEED_KILOMETERS_PER_HOUR,
         SPEED_KNOTS,
         SPEED_METERS_PER_SECOND,
         SPEED_MILES_PER_HOUR,
-        SPEED_MILLIMETERS_PER_DAY,
     }
 
 
diff --git a/tests/util/test_unit_conversion.py b/tests/util/test_unit_conversion.py
index d74bacc66f8..98be32584c6 100644
--- a/tests/util/test_unit_conversion.py
+++ b/tests/util/test_unit_conversion.py
@@ -21,6 +21,10 @@ from homeassistant.const import (
     MASS_POUNDS,
     POWER_KILO_WATT,
     POWER_WATT,
+    PRECIPITATION_INTENSITY_INCHES_PER_DAY,
+    PRECIPITATION_INTENSITY_INCHES_PER_HOUR,
+    PRECIPITATION_INTENSITY_MILLIMETERS_PER_DAY,
+    PRECIPITATION_INTENSITY_MILLIMETERS_PER_HOUR,
     PRESSURE_CBAR,
     PRESSURE_HPA,
     PRESSURE_INHG,
@@ -30,13 +34,10 @@ from homeassistant.const import (
     PRESSURE_PA,
     PRESSURE_PSI,
     SPEED_FEET_PER_SECOND,
-    SPEED_INCHES_PER_DAY,
-    SPEED_INCHES_PER_HOUR,
     SPEED_KILOMETERS_PER_HOUR,
     SPEED_KNOTS,
     SPEED_METERS_PER_SECOND,
     SPEED_MILES_PER_HOUR,
-    SPEED_MILLIMETERS_PER_DAY,
     TEMP_CELSIUS,
     TEMP_FAHRENHEIT,
     TEMP_KELVIN,
@@ -93,14 +94,15 @@ INVALID_SYMBOL = "bob"
         (PressureConverter, PRESSURE_CBAR),
         (PressureConverter, PRESSURE_MMHG),
         (PressureConverter, PRESSURE_PSI),
+        (SpeedConverter, PRECIPITATION_INTENSITY_INCHES_PER_DAY),
+        (SpeedConverter, PRECIPITATION_INTENSITY_INCHES_PER_HOUR),
+        (SpeedConverter, PRECIPITATION_INTENSITY_MILLIMETERS_PER_DAY),
+        (SpeedConverter, PRECIPITATION_INTENSITY_MILLIMETERS_PER_HOUR),
         (SpeedConverter, SPEED_FEET_PER_SECOND),
-        (SpeedConverter, SPEED_INCHES_PER_DAY),
-        (SpeedConverter, SPEED_INCHES_PER_HOUR),
         (SpeedConverter, SPEED_KILOMETERS_PER_HOUR),
         (SpeedConverter, SPEED_KNOTS),
         (SpeedConverter, SPEED_METERS_PER_SECOND),
         (SpeedConverter, SPEED_MILES_PER_HOUR),
-        (SpeedConverter, SPEED_MILLIMETERS_PER_DAY),
         (TemperatureConverter, TEMP_CELSIUS),
         (TemperatureConverter, TEMP_FAHRENHEIT),
         (TemperatureConverter, TEMP_KELVIN),
@@ -389,17 +391,44 @@ def test_pressure_convert(
         # 5 mi/h * 1.609 km/mi = 8.04672 km/h
         (5, SPEED_MILES_PER_HOUR, 8.04672, SPEED_KILOMETERS_PER_HOUR),
         # 5 in/day * 25.4 mm/in = 127 mm/day
-        (5, SPEED_INCHES_PER_DAY, 127, SPEED_MILLIMETERS_PER_DAY),
+        (
+            5,
+            PRECIPITATION_INTENSITY_INCHES_PER_DAY,
+            127,
+            PRECIPITATION_INTENSITY_MILLIMETERS_PER_DAY,
+        ),
         # 5 mm/day / 25.4 mm/in = 0.19685 in/day
-        (5, SPEED_MILLIMETERS_PER_DAY, pytest.approx(0.1968504), SPEED_INCHES_PER_DAY),
+        (
+            5,
+            PRECIPITATION_INTENSITY_MILLIMETERS_PER_DAY,
+            pytest.approx(0.1968504),
+            PRECIPITATION_INTENSITY_INCHES_PER_DAY,
+        ),
+        # 48 mm/day = 2 mm/h
+        (
+            48,
+            PRECIPITATION_INTENSITY_MILLIMETERS_PER_DAY,
+            pytest.approx(2),
+            PRECIPITATION_INTENSITY_MILLIMETERS_PER_HOUR,
+        ),
         # 5 in/hr * 24 hr/day = 3048 mm/day
-        (5, SPEED_INCHES_PER_HOUR, 3048, SPEED_MILLIMETERS_PER_DAY),
+        (
+            5,
+            PRECIPITATION_INTENSITY_INCHES_PER_HOUR,
+            3048,
+            PRECIPITATION_INTENSITY_MILLIMETERS_PER_DAY,
+        ),
         # 5 m/s * 39.3701 in/m * 3600 s/hr = 708661
-        (5, SPEED_METERS_PER_SECOND, pytest.approx(708661.42), SPEED_INCHES_PER_HOUR),
+        (
+            5,
+            SPEED_METERS_PER_SECOND,
+            pytest.approx(708661.42),
+            PRECIPITATION_INTENSITY_INCHES_PER_HOUR,
+        ),
         # 5000 in/h / 39.3701 in/m / 3600 s/h = 0.03528 m/s
         (
             5000,
-            SPEED_INCHES_PER_HOUR,
+            PRECIPITATION_INTENSITY_INCHES_PER_HOUR,
             pytest.approx(0.0352778),
             SPEED_METERS_PER_SECOND,
         ),