diff --git a/bundles/org.openhab.binding.surepetcare/README.md b/bundles/org.openhab.binding.surepetcare/README.md
index 3a98d9ca89420..ad5d06c1c8fc0 100644
--- a/bundles/org.openhab.binding.surepetcare/README.md
+++ b/bundles/org.openhab.binding.surepetcare/README.md
@@ -162,7 +162,7 @@ Channel names in **bold** are read/write, everything else is read-only
 | **location**           | Text        | The current location of the pet (0=unknown, 1=inside, 2=outside) |
 | locationChanged        | DateTime    | The time when the location was last changed                      |
 | locationChangedThrough | Text        | The device name or username where the pet left/entered the house |
-| weight                 | Number      | The pet's weight                                                 |
+| weight                 | Number:Mass | The pet's weight (in kilogram)                                   |
 | dateOfBirth            | DateTime    | The pet's date of birth                                          |
 | feederDevice           | Text        | The device from which the pet last ate                           |
 | feederLastChange       | Number:Mass | The last eaten change in gram (big bowl)                         |
@@ -270,7 +270,7 @@ String      UR_1e_TagIdentifier     "Pet Tag Identifier [%s]"               (dgP
 String      UR_1e_Location          "Pet Location [%s]"                     (dgPet) {channel="surepetcare:pet:bridge1:12345:location"}
 DateTime    UR_1e_LocationChanged   "Pet Loc. Updated [%1$ta. %1$tH:%1$tM]" (dgPet) {channel="surepetcare:pet:bridge1:12345:locationChanged"}
 String      UR_1e_LocationThrough   "Pet Entered / Left through [%s]"       (dgPet) {channel="surepetcare:pet:bridge1:12345:locationChangedThrough"}
-Number      UR_1e_Weight            "Pet Weight [%.1f kg]"                  (dgPet) {channel="surepetcare:pet:bridge1:12345:weight"}
+Number:Mass UR_1e_Weight            "Pet Weight [%.1f %unit%]"              (dgPet) {channel="surepetcare:pet:bridge1:12345:weight"}
 DateTime    UR_1e_DateOfBirth       "Pet Date of Birth [%1$td.%1$tm.%1$tY]" (dgPet) {channel="surepetcare:pet:bridge1:12345:dateOfBirth"}
 // Pet Feeder Data
 String      UR_1e_Device            "Device Name [%s]"                      (dgPet) {channel="surepetcare:pet:bridge1:12345:feederDevice"}
diff --git a/bundles/org.openhab.binding.surepetcare/config/items/pet.items b/bundles/org.openhab.binding.surepetcare/config/items/pet.items
index cccd49fa8f13b..e6793911a5606 100644
--- a/bundles/org.openhab.binding.surepetcare/config/items/pet.items
+++ b/bundles/org.openhab.binding.surepetcare/config/items/pet.items
@@ -9,7 +9,7 @@ String      UR_1e_TagIdentifier     "Pet Tag Identifier [%s]"               (dgP
 String      UR_1e_Location          "Pet Location [%s]"                     (dgPet) {channel="surepetcare:pet:bridge1:12345:location"}
 DateTime    UR_1e_LocationChanged   "Pet Loc. Updated [%1$ta. %1$tH:%1$tM]" (dgPet) {channel="surepetcare:pet:bridge1:12345:locationChanged"}
 String      UR_1e_LocationThrough   "Pet Entered / Left through [%s]"       (dgPet) {channel="surepetcare:pet:bridge1:12345:locationChangedThrough"}
-Number      UR_1e_Weight            "Pet Weight [%.1f kg]"                  (dgPet) {channel="surepetcare:pet:bridge1:12345:weight"}
+Number:Mass UR_1e_Weight            "Pet Weight [%.1f %unit%]"              (dgPet) {channel="surepetcare:pet:bridge1:12345:weight"}
 DateTime    UR_1e_DateOfBirth       "Pet Date of Birth [%1$td.%1$tm.%1$tY]" (dgPet) {channel="surepetcare:pet:bridge1:12345:dateOfBirth"}
 // Pet Feeder Data
 String      UR_1e_Device            "Device Name [%s]"                      (dgPet) {channel="surepetcare:pet:bridge1:12345:feederDevice"}
diff --git a/bundles/org.openhab.binding.surepetcare/src/main/java/org/openhab/binding/surepetcare/internal/handler/SurePetcarePetHandler.java b/bundles/org.openhab.binding.surepetcare/src/main/java/org/openhab/binding/surepetcare/internal/handler/SurePetcarePetHandler.java
index c92c10cec9169..ae75451c6eccc 100644
--- a/bundles/org.openhab.binding.surepetcare/src/main/java/org/openhab/binding/surepetcare/internal/handler/SurePetcarePetHandler.java
+++ b/bundles/org.openhab.binding.surepetcare/src/main/java/org/openhab/binding/surepetcare/internal/handler/SurePetcarePetHandler.java
@@ -129,8 +129,8 @@ protected void updateThing() {
                 }
                 ZonedDateTime dob = pet.getDateOfBirthAsZonedDateTime();
                 updateState(PET_CHANNEL_DATE_OF_BIRTH, dob == null ? UnDefType.UNDEF : new DateTimeType(dob));
-                updateState(PET_CHANNEL_WEIGHT,
-                        pet.getWeight() == null ? UnDefType.UNDEF : new DecimalType(pet.getWeight()));
+                updateState(PET_CHANNEL_WEIGHT, pet.getWeight() == null ? UnDefType.UNDEF
+                        : new QuantityType<Mass>(pet.getWeight(), SIUnits.KILOGRAM));
                 if (pet.getTagId() != null) {
                     SurePetcareTag tag = petcareAPI.getTag(pet.getTagId().toString());
                     if (tag != null) {
diff --git a/bundles/org.openhab.binding.surepetcare/src/main/resources/ESH-INF/thing/things.xml b/bundles/org.openhab.binding.surepetcare/src/main/resources/ESH-INF/thing/things.xml
index ba643b36fff61..f86d970bac065 100644
--- a/bundles/org.openhab.binding.surepetcare/src/main/resources/ESH-INF/thing/things.xml
+++ b/bundles/org.openhab.binding.surepetcare/src/main/resources/ESH-INF/thing/things.xml
@@ -420,10 +420,10 @@
 	</channel-type>
 
 	<channel-type id="weightType">
-		<item-type>Number</item-type>
+		<item-type>Number:Mass</item-type>
 		<label>Pet Weight</label>
 		<description>The pet weight</description>
-		<state readOnly="true" pattern="%.1f kg"></state>
+		<state readOnly="true" pattern="%.1f %unit%"></state>
 	</channel-type>
 
 	<channel-type id="feederDeviceType">