diff --git a/homeassistant/components/onewire/const.py b/homeassistant/components/onewire/const.py
index 4904d1568ef..f9f40e49ced 100644
--- a/homeassistant/components/onewire/const.py
+++ b/homeassistant/components/onewire/const.py
@@ -43,8 +43,6 @@ MANUFACTURER_MAXIM = "Maxim Integrated"
 MANUFACTURER_HOBBYBOARDS = "Hobby Boards"
 MANUFACTURER_EDS = "Embedded Data Systems"
 
-PRESSURE_CBAR = "cbar"
-
 READ_MODE_BOOL = "bool"
 READ_MODE_FLOAT = "float"
 READ_MODE_INT = "int"
diff --git a/homeassistant/components/onewire/sensor.py b/homeassistant/components/onewire/sensor.py
index fa477ff27e0..54528cf05f3 100644
--- a/homeassistant/components/onewire/sensor.py
+++ b/homeassistant/components/onewire/sensor.py
@@ -34,6 +34,7 @@ from homeassistant.const import (
     ELECTRIC_POTENTIAL_VOLT,
     LIGHT_LUX,
     PERCENTAGE,
+    PRESSURE_CBAR,
     PRESSURE_MBAR,
     TEMP_CELSIUS,
 )
@@ -47,7 +48,6 @@ from .const import (
     CONF_TYPE_OWSERVER,
     CONF_TYPE_SYSBUS,
     DOMAIN,
-    PRESSURE_CBAR,
     READ_MODE_FLOAT,
     READ_MODE_INT,
 )
diff --git a/homeassistant/const.py b/homeassistant/const.py
index 302cf3b00ab..2142556a217 100644
--- a/homeassistant/const.py
+++ b/homeassistant/const.py
@@ -479,6 +479,7 @@ PRESSURE_PA: Final = "Pa"
 PRESSURE_HPA: Final = "hPa"
 PRESSURE_KPA: Final = "kPa"
 PRESSURE_BAR: Final = "bar"
+PRESSURE_CBAR: Final = "cbar"
 PRESSURE_MBAR: Final = "mbar"
 PRESSURE_INHG: Final = "inHg"
 PRESSURE_PSI: Final = "psi"
diff --git a/homeassistant/util/pressure.py b/homeassistant/util/pressure.py
index 53bbbffc01e..8ff3f9f5f93 100644
--- a/homeassistant/util/pressure.py
+++ b/homeassistant/util/pressure.py
@@ -6,6 +6,7 @@ from numbers import Number
 from homeassistant.const import (
     PRESSURE,
     PRESSURE_BAR,
+    PRESSURE_CBAR,
     PRESSURE_HPA,
     PRESSURE_INHG,
     PRESSURE_KPA,
@@ -20,6 +21,7 @@ VALID_UNITS: tuple[str, ...] = (
     PRESSURE_HPA,
     PRESSURE_KPA,
     PRESSURE_BAR,
+    PRESSURE_CBAR,
     PRESSURE_MBAR,
     PRESSURE_INHG,
     PRESSURE_PSI,
@@ -30,6 +32,7 @@ UNIT_CONVERSION: dict[str, float] = {
     PRESSURE_HPA: 1 / 100,
     PRESSURE_KPA: 1 / 1000,
     PRESSURE_BAR: 1 / 100000,
+    PRESSURE_CBAR: 1 / 1000,
     PRESSURE_MBAR: 1 / 100,
     PRESSURE_INHG: 1 / 3386.389,
     PRESSURE_PSI: 1 / 6894.757,
diff --git a/tests/components/onewire/const.py b/tests/components/onewire/const.py
index 1d0bf0f8e84..55663c65d36 100644
--- a/tests/components/onewire/const.py
+++ b/tests/components/onewire/const.py
@@ -8,7 +8,6 @@ from homeassistant.components.onewire.const import (
     MANUFACTURER_EDS,
     MANUFACTURER_HOBBYBOARDS,
     MANUFACTURER_MAXIM,
-    PRESSURE_CBAR,
 )
 from homeassistant.components.sensor import (
     ATTR_STATE_CLASS,
@@ -37,6 +36,7 @@ from homeassistant.const import (
     ELECTRIC_POTENTIAL_VOLT,
     LIGHT_LUX,
     PERCENTAGE,
+    PRESSURE_CBAR,
     PRESSURE_MBAR,
     STATE_OFF,
     STATE_ON,
diff --git a/tests/util/test_pressure.py b/tests/util/test_pressure.py
index d6211fa5343..0109d045a55 100644
--- a/tests/util/test_pressure.py
+++ b/tests/util/test_pressure.py
@@ -2,6 +2,7 @@
 import pytest
 
 from homeassistant.const import (
+    PRESSURE_CBAR,
     PRESSURE_HPA,
     PRESSURE_INHG,
     PRESSURE_KPA,
@@ -22,6 +23,7 @@ def test_convert_same_unit():
     assert pressure_util.convert(4, PRESSURE_MBAR, PRESSURE_MBAR) == 4
     assert pressure_util.convert(5, PRESSURE_INHG, PRESSURE_INHG) == 5
     assert pressure_util.convert(6, PRESSURE_KPA, PRESSURE_KPA) == 6
+    assert pressure_util.convert(7, PRESSURE_CBAR, PRESSURE_CBAR) == 7
 
 
 def test_convert_invalid_unit():
@@ -57,6 +59,9 @@ def test_convert_from_hpascals():
     assert pressure_util.convert(
         hpascals, PRESSURE_HPA, PRESSURE_MBAR
     ) == pytest.approx(1000)
+    assert pressure_util.convert(
+        hpascals, PRESSURE_HPA, PRESSURE_CBAR
+    ) == pytest.approx(100)
 
 
 def test_convert_from_kpascals():
@@ -77,6 +82,9 @@ def test_convert_from_kpascals():
     assert pressure_util.convert(
         kpascals, PRESSURE_KPA, PRESSURE_MBAR
     ) == pytest.approx(1000)
+    assert pressure_util.convert(
+        kpascals, PRESSURE_KPA, PRESSURE_CBAR
+    ) == pytest.approx(100)
 
 
 def test_convert_from_inhg():
@@ -97,3 +105,6 @@ def test_convert_from_inhg():
     assert pressure_util.convert(inhg, PRESSURE_INHG, PRESSURE_MBAR) == pytest.approx(
         1015.9167
     )
+    assert pressure_util.convert(inhg, PRESSURE_INHG, PRESSURE_CBAR) == pytest.approx(
+        101.59167
+    )