diff --git a/homeassistant/components/portainer/sensor.py b/homeassistant/components/portainer/sensor.py
index e72db37351d7..53cb302e5d8d 100644
--- a/homeassistant/components/portainer/sensor.py
+++ b/homeassistant/components/portainer/sensor.py
@@ -16,7 +16,7 @@ from homeassistant.components.sensor import (
     SensorStateClass,
     StateType,
 )
-from homeassistant.const import PERCENTAGE, UnitOfInformation
+from homeassistant.const import UnitOfInformation, UnitOfRatio
 from homeassistant.core import HomeAssistant
 from homeassistant.helpers.entity_platform import AddConfigEntryEntitiesCallback
 
@@ -122,7 +122,7 @@ CONTAINER_SENSORS: tuple[PortainerContainerSensorEntityDescription, ...] = (
             and data.stats.memory_stats.usage > 0
             else 0.0
         ),
-        native_unit_of_measurement=PERCENTAGE,
+        native_unit_of_measurement=UnitOfRatio.PERCENTAGE,
         entity_category=EntityCategory.DIAGNOSTIC,
         suggested_display_precision=2,
         state_class=SensorStateClass.MEASUREMENT,
@@ -151,7 +151,7 @@ CONTAINER_SENSORS: tuple[PortainerContainerSensorEntityDescription, ...] = (
             and data.stats.cpu_stats.online_cpus > 0
             else 0.0
         ),
-        native_unit_of_measurement=PERCENTAGE,
+        native_unit_of_measurement=UnitOfRatio.PERCENTAGE,
         entity_category=EntityCategory.DIAGNOSTIC,
         suggested_display_precision=2,
         state_class=SensorStateClass.MEASUREMENT,
diff --git a/tests/components/portainer/snapshots/test_sensor.ambr b/tests/components/portainer/snapshots/test_sensor.ambr
index 0acd9aa8605d..c63338ea4000 100644
--- a/tests/components/portainer/snapshots/test_sensor.ambr
+++ b/tests/components/portainer/snapshots/test_sensor.ambr
@@ -203,7 +203,7 @@
     'supported_features': 0,
     'translation_key': 'cpu_usage_total',
     'unique_id': 'portainer_test_entry_123_dashy_dashy.1.qgza68hnz4n1qvyz3iohynx05_cpu_usage_total',
-    'unit_of_measurement': '%',
+    'unit_of_measurement': <UnitOfRatio.PERCENTAGE: '%'>,
   })
 # ---
 # name: test_all_entities[sensor.dashy_dashy_1_qgza68hnz4n1qvyz3iohynx05_cpu_usage_total-state]
@@ -211,7 +211,7 @@
     'attributes': ReadOnlyDict({
       <EntityStateAttribute.FRIENDLY_NAME: 'friendly_name'>: 'dashy_dashy.1.qgza68hnz4n1qvyz3iohynx05 CPU usage total',
       <SensorEntityCapabilityAttribute.STATE_CLASS: 'state_class'>: <SensorStateClass.MEASUREMENT: 'measurement'>,
-      <EntityStateAttribute.UNIT_OF_MEASUREMENT: 'unit_of_measurement'>: '%',
+      <EntityStateAttribute.UNIT_OF_MEASUREMENT: 'unit_of_measurement'>: <UnitOfRatio.PERCENTAGE: '%'>,
     }),
     'context': <ANY>,
     'entity_id': 'sensor.dashy_dashy_1_qgza68hnz4n1qvyz3iohynx05_cpu_usage_total',
@@ -432,7 +432,7 @@
     'supported_features': 0,
     'translation_key': 'memory_usage_percentage',
     'unique_id': 'portainer_test_entry_123_dashy_dashy.1.qgza68hnz4n1qvyz3iohynx05_memory_usage_percentage',
-    'unit_of_measurement': '%',
+    'unit_of_measurement': <UnitOfRatio.PERCENTAGE: '%'>,
   })
 # ---
 # name: test_all_entities[sensor.dashy_dashy_1_qgza68hnz4n1qvyz3iohynx05_memory_usage_percentage-state]
@@ -440,7 +440,7 @@
     'attributes': ReadOnlyDict({
       <EntityStateAttribute.FRIENDLY_NAME: 'friendly_name'>: 'dashy_dashy.1.qgza68hnz4n1qvyz3iohynx05 Memory usage percentage',
       <SensorEntityCapabilityAttribute.STATE_CLASS: 'state_class'>: <SensorStateClass.MEASUREMENT: 'measurement'>,
-      <EntityStateAttribute.UNIT_OF_MEASUREMENT: 'unit_of_measurement'>: '%',
+      <EntityStateAttribute.UNIT_OF_MEASUREMENT: 'unit_of_measurement'>: <UnitOfRatio.PERCENTAGE: '%'>,
     }),
     'context': <ANY>,
     'entity_id': 'sensor.dashy_dashy_1_qgza68hnz4n1qvyz3iohynx05_memory_usage_percentage',
@@ -730,7 +730,7 @@
     'supported_features': 0,
     'translation_key': 'cpu_usage_total',
     'unique_id': 'portainer_test_entry_123_focused_einstein_cpu_usage_total',
-    'unit_of_measurement': '%',
+    'unit_of_measurement': <UnitOfRatio.PERCENTAGE: '%'>,
   })
 # ---
 # name: test_all_entities[sensor.focused_einstein_cpu_usage_total-state]
@@ -738,7 +738,7 @@
     'attributes': ReadOnlyDict({
       <EntityStateAttribute.FRIENDLY_NAME: 'friendly_name'>: 'focused_einstein CPU usage total',
       <SensorEntityCapabilityAttribute.STATE_CLASS: 'state_class'>: <SensorStateClass.MEASUREMENT: 'measurement'>,
-      <EntityStateAttribute.UNIT_OF_MEASUREMENT: 'unit_of_measurement'>: '%',
+      <EntityStateAttribute.UNIT_OF_MEASUREMENT: 'unit_of_measurement'>: <UnitOfRatio.PERCENTAGE: '%'>,
     }),
     'context': <ANY>,
     'entity_id': 'sensor.focused_einstein_cpu_usage_total',
@@ -959,7 +959,7 @@
     'supported_features': 0,
     'translation_key': 'memory_usage_percentage',
     'unique_id': 'portainer_test_entry_123_focused_einstein_memory_usage_percentage',
-    'unit_of_measurement': '%',
+    'unit_of_measurement': <UnitOfRatio.PERCENTAGE: '%'>,
   })
 # ---
 # name: test_all_entities[sensor.focused_einstein_memory_usage_percentage-state]
@@ -967,7 +967,7 @@
     'attributes': ReadOnlyDict({
       <EntityStateAttribute.FRIENDLY_NAME: 'friendly_name'>: 'focused_einstein Memory usage percentage',
       <SensorEntityCapabilityAttribute.STATE_CLASS: 'state_class'>: <SensorStateClass.MEASUREMENT: 'measurement'>,
-      <EntityStateAttribute.UNIT_OF_MEASUREMENT: 'unit_of_measurement'>: '%',
+      <EntityStateAttribute.UNIT_OF_MEASUREMENT: 'unit_of_measurement'>: <UnitOfRatio.PERCENTAGE: '%'>,
     }),
     'context': <ANY>,
     'entity_id': 'sensor.focused_einstein_memory_usage_percentage',
@@ -1084,7 +1084,7 @@
     'supported_features': 0,
     'translation_key': 'cpu_usage_total',
     'unique_id': 'portainer_test_entry_123_funny_chatelet_cpu_usage_total',
-    'unit_of_measurement': '%',
+    'unit_of_measurement': <UnitOfRatio.PERCENTAGE: '%'>,
   })
 # ---
 # name: test_all_entities[sensor.funny_chatelet_cpu_usage_total-state]
@@ -1092,7 +1092,7 @@
     'attributes': ReadOnlyDict({
       <EntityStateAttribute.FRIENDLY_NAME: 'friendly_name'>: 'funny_chatelet CPU usage total',
       <SensorEntityCapabilityAttribute.STATE_CLASS: 'state_class'>: <SensorStateClass.MEASUREMENT: 'measurement'>,
-      <EntityStateAttribute.UNIT_OF_MEASUREMENT: 'unit_of_measurement'>: '%',
+      <EntityStateAttribute.UNIT_OF_MEASUREMENT: 'unit_of_measurement'>: <UnitOfRatio.PERCENTAGE: '%'>,
     }),
     'context': <ANY>,
     'entity_id': 'sensor.funny_chatelet_cpu_usage_total',
@@ -1313,7 +1313,7 @@
     'supported_features': 0,
     'translation_key': 'memory_usage_percentage',
     'unique_id': 'portainer_test_entry_123_funny_chatelet_memory_usage_percentage',
-    'unit_of_measurement': '%',
+    'unit_of_measurement': <UnitOfRatio.PERCENTAGE: '%'>,
   })
 # ---
 # name: test_all_entities[sensor.funny_chatelet_memory_usage_percentage-state]
@@ -1321,7 +1321,7 @@
     'attributes': ReadOnlyDict({
       <EntityStateAttribute.FRIENDLY_NAME: 'friendly_name'>: 'funny_chatelet Memory usage percentage',
       <SensorEntityCapabilityAttribute.STATE_CLASS: 'state_class'>: <SensorStateClass.MEASUREMENT: 'measurement'>,
-      <EntityStateAttribute.UNIT_OF_MEASUREMENT: 'unit_of_measurement'>: '%',
+      <EntityStateAttribute.UNIT_OF_MEASUREMENT: 'unit_of_measurement'>: <UnitOfRatio.PERCENTAGE: '%'>,
     }),
     'context': <ANY>,
     'entity_id': 'sensor.funny_chatelet_memory_usage_percentage',
@@ -2533,7 +2533,7 @@
     'supported_features': 0,
     'translation_key': 'cpu_usage_total',
     'unique_id': 'portainer_test_entry_123_practical_morse_cpu_usage_total',
-    'unit_of_measurement': '%',
+    'unit_of_measurement': <UnitOfRatio.PERCENTAGE: '%'>,
   })
 # ---
 # name: test_all_entities[sensor.practical_morse_cpu_usage_total-state]
@@ -2541,7 +2541,7 @@
     'attributes': ReadOnlyDict({
       <EntityStateAttribute.FRIENDLY_NAME: 'friendly_name'>: 'practical_morse CPU usage total',
       <SensorEntityCapabilityAttribute.STATE_CLASS: 'state_class'>: <SensorStateClass.MEASUREMENT: 'measurement'>,
-      <EntityStateAttribute.UNIT_OF_MEASUREMENT: 'unit_of_measurement'>: '%',
+      <EntityStateAttribute.UNIT_OF_MEASUREMENT: 'unit_of_measurement'>: <UnitOfRatio.PERCENTAGE: '%'>,
     }),
     'context': <ANY>,
     'entity_id': 'sensor.practical_morse_cpu_usage_total',
@@ -2762,7 +2762,7 @@
     'supported_features': 0,
     'translation_key': 'memory_usage_percentage',
     'unique_id': 'portainer_test_entry_123_practical_morse_memory_usage_percentage',
-    'unit_of_measurement': '%',
+    'unit_of_measurement': <UnitOfRatio.PERCENTAGE: '%'>,
   })
 # ---
 # name: test_all_entities[sensor.practical_morse_memory_usage_percentage-state]
@@ -2770,7 +2770,7 @@
     'attributes': ReadOnlyDict({
       <EntityStateAttribute.FRIENDLY_NAME: 'friendly_name'>: 'practical_morse Memory usage percentage',
       <SensorEntityCapabilityAttribute.STATE_CLASS: 'state_class'>: <SensorStateClass.MEASUREMENT: 'measurement'>,
-      <EntityStateAttribute.UNIT_OF_MEASUREMENT: 'unit_of_measurement'>: '%',
+      <EntityStateAttribute.UNIT_OF_MEASUREMENT: 'unit_of_measurement'>: <UnitOfRatio.PERCENTAGE: '%'>,
     }),
     'context': <ANY>,
     'entity_id': 'sensor.practical_morse_memory_usage_percentage',
@@ -2887,7 +2887,7 @@
     'supported_features': 0,
     'translation_key': 'cpu_usage_total',
     'unique_id': 'portainer_test_entry_123_serene_banach_cpu_usage_total',
-    'unit_of_measurement': '%',
+    'unit_of_measurement': <UnitOfRatio.PERCENTAGE: '%'>,
   })
 # ---
 # name: test_all_entities[sensor.serene_banach_cpu_usage_total-state]
@@ -2895,7 +2895,7 @@
     'attributes': ReadOnlyDict({
       <EntityStateAttribute.FRIENDLY_NAME: 'friendly_name'>: 'serene_banach CPU usage total',
       <SensorEntityCapabilityAttribute.STATE_CLASS: 'state_class'>: <SensorStateClass.MEASUREMENT: 'measurement'>,
-      <EntityStateAttribute.UNIT_OF_MEASUREMENT: 'unit_of_measurement'>: '%',
+      <EntityStateAttribute.UNIT_OF_MEASUREMENT: 'unit_of_measurement'>: <UnitOfRatio.PERCENTAGE: '%'>,
     }),
     'context': <ANY>,
     'entity_id': 'sensor.serene_banach_cpu_usage_total',
@@ -3116,7 +3116,7 @@
     'supported_features': 0,
     'translation_key': 'memory_usage_percentage',
     'unique_id': 'portainer_test_entry_123_serene_banach_memory_usage_percentage',
-    'unit_of_measurement': '%',
+    'unit_of_measurement': <UnitOfRatio.PERCENTAGE: '%'>,
   })
 # ---
 # name: test_all_entities[sensor.serene_banach_memory_usage_percentage-state]
@@ -3124,7 +3124,7 @@
     'attributes': ReadOnlyDict({
       <EntityStateAttribute.FRIENDLY_NAME: 'friendly_name'>: 'serene_banach Memory usage percentage',
       <SensorEntityCapabilityAttribute.STATE_CLASS: 'state_class'>: <SensorStateClass.MEASUREMENT: 'measurement'>,
-      <EntityStateAttribute.UNIT_OF_MEASUREMENT: 'unit_of_measurement'>: '%',
+      <EntityStateAttribute.UNIT_OF_MEASUREMENT: 'unit_of_measurement'>: <UnitOfRatio.PERCENTAGE: '%'>,
     }),
     'context': <ANY>,
     'entity_id': 'sensor.serene_banach_memory_usage_percentage',
@@ -3241,7 +3241,7 @@
     'supported_features': 0,
     'translation_key': 'cpu_usage_total',
     'unique_id': 'portainer_test_entry_123_stoic_turing_cpu_usage_total',
-    'unit_of_measurement': '%',
+    'unit_of_measurement': <UnitOfRatio.PERCENTAGE: '%'>,
   })
 # ---
 # name: test_all_entities[sensor.stoic_turing_cpu_usage_total-state]
@@ -3249,7 +3249,7 @@
     'attributes': ReadOnlyDict({
       <EntityStateAttribute.FRIENDLY_NAME: 'friendly_name'>: 'stoic_turing CPU usage total',
       <SensorEntityCapabilityAttribute.STATE_CLASS: 'state_class'>: <SensorStateClass.MEASUREMENT: 'measurement'>,
-      <EntityStateAttribute.UNIT_OF_MEASUREMENT: 'unit_of_measurement'>: '%',
+      <EntityStateAttribute.UNIT_OF_MEASUREMENT: 'unit_of_measurement'>: <UnitOfRatio.PERCENTAGE: '%'>,
     }),
     'context': <ANY>,
     'entity_id': 'sensor.stoic_turing_cpu_usage_total',
@@ -3470,7 +3470,7 @@
     'supported_features': 0,
     'translation_key': 'memory_usage_percentage',
     'unique_id': 'portainer_test_entry_123_stoic_turing_memory_usage_percentage',
-    'unit_of_measurement': '%',
+    'unit_of_measurement': <UnitOfRatio.PERCENTAGE: '%'>,
   })
 # ---
 # name: test_all_entities[sensor.stoic_turing_memory_usage_percentage-state]
@@ -3478,7 +3478,7 @@
     'attributes': ReadOnlyDict({
       <EntityStateAttribute.FRIENDLY_NAME: 'friendly_name'>: 'stoic_turing Memory usage percentage',
       <SensorEntityCapabilityAttribute.STATE_CLASS: 'state_class'>: <SensorStateClass.MEASUREMENT: 'measurement'>,
-      <EntityStateAttribute.UNIT_OF_MEASUREMENT: 'unit_of_measurement'>: '%',
+      <EntityStateAttribute.UNIT_OF_MEASUREMENT: 'unit_of_measurement'>: <UnitOfRatio.PERCENTAGE: '%'>,
     }),
     'context': <ANY>,
     'entity_id': 'sensor.stoic_turing_memory_usage_percentage',