diff --git a/bundles/org.openhab.io.homekit/src/main/java/org/openhab/io/homekit/internal/accessories/AbstractHomekitAccessoryImpl.java b/bundles/org.openhab.io.homekit/src/main/java/org/openhab/io/homekit/internal/accessories/AbstractHomekitAccessoryImpl.java
index fab3ceab42383..00d1be3791977 100644
--- a/bundles/org.openhab.io.homekit/src/main/java/org/openhab/io/homekit/internal/accessories/AbstractHomekitAccessoryImpl.java
+++ b/bundles/org.openhab.io.homekit/src/main/java/org/openhab/io/homekit/internal/accessories/AbstractHomekitAccessoryImpl.java
@@ -18,12 +18,19 @@
 import java.util.Map;
 import java.util.Optional;
 import java.util.concurrent.CompletableFuture;
+import java.math.BigDecimal;
+import java.math.RoundingMode;
+
+import javax.measure.Quantity;
+import javax.measure.Unit;
 
 import org.eclipse.jdt.annotation.NonNull;
 import org.eclipse.jdt.annotation.Nullable;
 import org.eclipse.smarthome.core.items.GenericItem;
 import org.eclipse.smarthome.core.items.Item;
 import org.eclipse.smarthome.core.types.State;
+import org.eclipse.smarthome.core.library.unit.SIUnits;
+import org.eclipse.smarthome.core.library.unit.ImperialUnits;
 import org.openhab.io.homekit.internal.HomekitAccessoryUpdater;
 import org.openhab.io.homekit.internal.HomekitCharacteristicType;
 import org.openhab.io.homekit.internal.HomekitSettings;
@@ -177,4 +184,17 @@ protected <T> T getAccessoryConfiguration(String key, @NonNull T defaultValue) {
     protected void addCharacteristic(HomekitTaggedItem characteristic) {
         characteristics.add(characteristic);
     }
+
+    private <T extends Quantity<T>> double convertAndRound(double value, Unit<T> from, Unit<T> to) {
+      double rawValue = from == to ? value : from.getConverterTo(to).convert(value);
+      return new BigDecimal(rawValue).setScale(1, RoundingMode.HALF_UP).doubleValue();
+    }
+
+    protected double convertToCelsius(double degrees){
+      return convertAndRound(degrees, getSettings().useFahrenheitTemperature ? ImperialUnits.FAHRENHEIT : SIUnits.CELSIUS, SIUnits.CELSIUS);
+    }
+
+    protected double convertFromCelsius(double degrees){
+      return convertAndRound(degrees, getSettings().useFahrenheitTemperature ? SIUnits.CELSIUS : ImperialUnits.FAHRENHEIT, ImperialUnits.FAHRENHEIT);
+    }
 }
diff --git a/bundles/org.openhab.io.homekit/src/main/java/org/openhab/io/homekit/internal/accessories/HomekitTemperatureSensorImpl.java b/bundles/org.openhab.io.homekit/src/main/java/org/openhab/io/homekit/internal/accessories/HomekitTemperatureSensorImpl.java
index 95ec95a3cbfe2..31e5777c6c0a0 100644
--- a/bundles/org.openhab.io.homekit/src/main/java/org/openhab/io/homekit/internal/accessories/HomekitTemperatureSensorImpl.java
+++ b/bundles/org.openhab.io.homekit/src/main/java/org/openhab/io/homekit/internal/accessories/HomekitTemperatureSensorImpl.java
@@ -55,20 +55,4 @@ public void subscribeCurrentTemperature(HomekitCharacteristicChangeCallback call
     public void unsubscribeCurrentTemperature() {
         unsubscribe(HomekitCharacteristicType.CURRENT_TEMPERATURE);
     }
-
-    protected double convertToCelsius(double degrees) {
-        if (getSettings().useFahrenheitTemperature) {
-            return Math.round((5d / 9d) * (degrees - 32d) * 1000d) / 1000d;
-        } else {
-            return degrees;
-        }
-    }
-
-    protected double convertFromCelsius(double degrees) {
-        if (getSettings().useFahrenheitTemperature) {
-            return Math.round((((9d / 5d) * degrees) + 32d) * 10d) / 10d;
-        } else {
-            return degrees;
-        }
-    }
 }
diff --git a/bundles/org.openhab.io.homekit/src/main/java/org/openhab/io/homekit/internal/accessories/HomekitThermostatImpl.java b/bundles/org.openhab.io.homekit/src/main/java/org/openhab/io/homekit/internal/accessories/HomekitThermostatImpl.java
index 086bc0176069b..495bffbdc8f79 100644
--- a/bundles/org.openhab.io.homekit/src/main/java/org/openhab/io/homekit/internal/accessories/HomekitThermostatImpl.java
+++ b/bundles/org.openhab.io.homekit/src/main/java/org/openhab/io/homekit/internal/accessories/HomekitThermostatImpl.java
@@ -236,20 +236,4 @@ public void unsubscribeTargetState() {
     public void unsubscribeTargetTemperature() {
         unsubscribe(HomekitCharacteristicType.TARGET_TEMPERATURE);
     }
-
-    protected double convertToCelsius(double degrees) {
-        if (getSettings().useFahrenheitTemperature) {
-            return Math.round((5d / 9d) * (degrees - 32d) * 1000d) / 1000d;
-        } else {
-            return degrees;
-        }
-    }
-
-    protected double convertFromCelsius(double degrees) {
-        if (getSettings().useFahrenheitTemperature) {
-            return Math.round((((9d / 5d) * degrees) + 32d) * 10d) / 10d;
-        } else {
-            return degrees;
-        }
-    }
 }