diff --git a/bundles/org.openhab.core/src/main/java/org/openhab/core/library/types/QuantityType.java b/bundles/org.openhab.core/src/main/java/org/openhab/core/library/types/QuantityType.java
index 84aa7c800ca..572f677c78d 100644
--- a/bundles/org.openhab.core/src/main/java/org/openhab/core/library/types/QuantityType.java
+++ b/bundles/org.openhab.core/src/main/java/org/openhab/core/library/types/QuantityType.java
@@ -240,10 +240,15 @@ public boolean equals(@Nullable Object obj) {
         if (!(obj instanceof QuantityType<?> other)) {
             return false;
         }
-        if (!quantity.getUnit().isCompatible(other.quantity.getUnit())
-                && !quantity.getUnit().inverse().isCompatible(other.quantity.getUnit())) {
-            return false;
-        } else if (internalCompareTo(other) != 0) {
+        if (quantity.getUnit().isCompatible(other.quantity.getUnit())) {
+            if (internalCompareTo(other) != 0) {
+                return false;
+            }
+        } else if (quantity.getUnit().isCompatible(other.quantity.getUnit().inverse())) {
+            if (internalCompareTo(other.inverse()) != 0) {
+                return false;
+            }
+        } else {
             return false;
         }
 
@@ -264,8 +269,6 @@ private int internalCompareTo(QuantityType<?> o) {
             } else {
                 throw new IllegalArgumentException("Unable to convert to system unit during compare.");
             }
-        } else if (quantity.getUnit().inverse().isCompatible(o.quantity.getUnit())) {
-            return inverse().internalCompareTo(o);
         } else {
             throw new IllegalArgumentException("Can not compare incompatible units.");
         }
diff --git a/bundles/org.openhab.core/src/test/java/org/openhab/core/library/types/QuantityTypeArithmeticGroupFunctionTest.java b/bundles/org.openhab.core/src/test/java/org/openhab/core/library/types/QuantityTypeArithmeticGroupFunctionTest.java
index 03031323520..71e2598ada7 100644
--- a/bundles/org.openhab.core/src/test/java/org/openhab/core/library/types/QuantityTypeArithmeticGroupFunctionTest.java
+++ b/bundles/org.openhab.core/src/test/java/org/openhab/core/library/types/QuantityTypeArithmeticGroupFunctionTest.java
@@ -12,7 +12,7 @@
  */
 package org.openhab.core.library.types;
 
-import static org.hamcrest.CoreMatchers.*;
+import static org.hamcrest.CoreMatchers.is;
 import static org.hamcrest.MatcherAssert.assertThat;
 import static org.hamcrest.number.IsCloseTo.closeTo;
 import static org.junit.jupiter.api.Assertions.assertEquals;
diff --git a/bundles/org.openhab.core/src/test/java/org/openhab/core/library/types/QuantityTypeTest.java b/bundles/org.openhab.core/src/test/java/org/openhab/core/library/types/QuantityTypeTest.java
index c8da24784db..a3fec4b0a1a 100644
--- a/bundles/org.openhab.core/src/test/java/org/openhab/core/library/types/QuantityTypeTest.java
+++ b/bundles/org.openhab.core/src/test/java/org/openhab/core/library/types/QuantityTypeTest.java
@@ -664,4 +664,45 @@ public void testRelativeConversion() {
         QuantityType<Temperature> f = c.toUnitRelative(ImperialUnits.FAHRENHEIT);
         assertEquals(1.8, f.doubleValue());
     }
+
+    @Test
+    public void testEquals() {
+        QuantityType<Temperature> temp1 = new QuantityType<>("293.15 K");
+        QuantityType<Temperature> temp2 = new QuantityType<>("20 °C");
+        assertTrue(temp1.equals(temp2));
+        assertTrue(temp2.equals(temp1));
+        temp2 = new QuantityType<>("-5 °C");
+        assertFalse(temp1.equals(temp2));
+
+        temp1 = new QuantityType<>("100000 K");
+        temp2 = new QuantityType<>("10 mirek");
+        assertTrue(temp1.equals(temp2));
+        assertTrue(temp2.equals(temp1));
+        temp2 = new QuantityType<>("20 mirek");
+        assertFalse(temp1.equals(temp2));
+
+        temp1 = new QuantityType<>("0.1 MK");
+        temp2 = new QuantityType<>("10 mirek");
+        assertTrue(temp1.equals(temp2));
+        assertTrue(temp2.equals(temp1));
+        temp2 = new QuantityType<>("20 mirek");
+        assertFalse(temp1.equals(temp2));
+    }
+
+    @Test
+    public void testCompareTo() {
+        QuantityType<Temperature> temp1 = new QuantityType<>("293.15 K");
+        QuantityType<Temperature> temp2 = new QuantityType<>("20 °C");
+        assertEquals(0, temp1.compareTo(temp2));
+        temp2 = new QuantityType<>("-5 °C");
+        assertEquals(1, temp1.compareTo(temp2));
+        temp2 = new QuantityType<>("50 °C");
+        assertEquals(-1, temp1.compareTo(temp2));
+
+        QuantityType<Temperature> temp3 = new QuantityType<>("100000 K");
+        QuantityType<Temperature> temp4 = new QuantityType<>("10 mirek");
+        assertThrows(IllegalArgumentException.class, () -> {
+            temp3.compareTo(temp4);
+        });
+    }
 }