diff --git a/homeassistant/util/pressure.py b/homeassistant/util/pressure.py
index 188cf66491e4..95b32a696434 100644
--- a/homeassistant/util/pressure.py
+++ b/homeassistant/util/pressure.py
@@ -5,6 +5,7 @@ from numbers import Number
 
 from homeassistant.const import (
     PRESSURE,
+    PRESSURE_BAR,
     PRESSURE_HPA,
     PRESSURE_INHG,
     PRESSURE_MBAR,
@@ -16,6 +17,7 @@ from homeassistant.const import (
 VALID_UNITS: tuple[str, ...] = (
     PRESSURE_PA,
     PRESSURE_HPA,
+    PRESSURE_BAR,
     PRESSURE_MBAR,
     PRESSURE_INHG,
     PRESSURE_PSI,
@@ -24,6 +26,7 @@ VALID_UNITS: tuple[str, ...] = (
 UNIT_CONVERSION: dict[str, float] = {
     PRESSURE_PA: 1,
     PRESSURE_HPA: 1 / 100,
+    PRESSURE_BAR: 1 / 100000,
     PRESSURE_MBAR: 1 / 100,
     PRESSURE_INHG: 1 / 3386.389,
     PRESSURE_PSI: 1 / 6894.757,