diff --git a/custom_components/smart_irrigation/__init__.py b/custom_components/smart_irrigation/__init__.py
index e5e2adbc..1c71e072 100644
--- a/custom_components/smart_irrigation/__init__.py
+++ b/custom_components/smart_irrigation/__init__.py
@@ -1275,6 +1275,18 @@ async def async_update_zone_config(self, zone_id: int = None, data: dict = {}):
         elif const.ATTR_UPDATE_ALL in data:
             _LOGGER.info("Updating all zones.")
             await self._async_update_all()
+        elif const.ATTR_SET_MULTIPLIER in data:
+            # set a multiplier to a new vlue
+            new_multiplier_value = 0
+            if const.ATTR_NEW_MULTIPLIER_VALUE in data:
+                new_multiplier_value = data[const.ATTR_NEW_MULTIPLIER_VALUE]
+            res = self.store.async_get_zone(zone_id)
+            if not res:
+                return
+            data[const.ZONE_MULTIPLIER] = new_multiplier_value
+            data.pop(const.ATTR_SET_MULTIPLIER)
+            self.store.async_update_zone(zone_id, data)
+            async_dispatcher_send(self.hass, const.DOMAIN + "_config_updated", zone_id)
         elif const.ATTR_SET_BUCKET in data:
             # set a bucket to a new value
             new_bucket_value = 0
@@ -1448,6 +1460,18 @@ async def _async_set_all_buckets(self, val=0):
                 zone_id=zone.get(const.ZONE_ID), data=data
             )
 
+    async def _async_set_all_multipliers(self, val=0):
+        """Sets all multipliers to val"""
+        zones = self.store.async_get_zones()
+        data = {}
+        data[const.ATTR_SET_MULTIPLIER] = {}
+        data[const.ATTR_NEW_MULTIPLIER_VALUE] = val
+
+        for zone in zones:
+            await self.async_update_zone_config(
+                zone_id=zone.get(const.ZONE_ID), data=data
+            )
+
     async def handle_calculate_all_zones(self, call):
         """Calculate all zones."""
         _LOGGER.info("Calculate all zones service called.")
@@ -1546,10 +1570,46 @@ async def handle_set_all_buckets(self, call):
         if const.ATTR_NEW_BUCKET_VALUE in call.data:
             new_value = call.data[const.ATTR_NEW_BUCKET_VALUE]
             _LOGGER.info(
-                "Reset all buckets service called, new value: {}".format(new_value)
+                "Set all buckets service called, new value: {}".format(new_value)
             )
             await self._async_set_all_buckets(new_value)
 
+    async def handle_set_multiplier(self, call):
+        """Reset a specific zone multiplier to new value"""
+        if (
+            const.SERVICE_ENTITY_ID in call.data
+            and const.ATTR_NEW_MULTIPLIER_VALUE in call.data
+        ):
+            new_value = call.data[const.ATTR_NEW_MULTIPLIER_VALUE]
+            eid = call.data[const.SERVICE_ENTITY_ID]
+            if not isinstance(eid, list):
+                eid = [call.data[const.SERVICE_ENTITY_ID]]
+            for entity in eid:
+                _LOGGER.info(
+                    "Set multiplier service called for zone {}, new value: {}.".format(
+                        entity, new_value
+                    )
+                )
+                # find entity zone id and call calculate on the zone
+                state = self.hass.states.get(entity)
+                if state:
+                    # find zone_id for zone with name
+                    zone_id = state.attributes.get(const.ZONE_ID)
+                    if not zone_id is None:
+                        data = {}
+                        data[const.ATTR_SET_MULTIPLIER] = {}
+                        data[const.ATTR_NEW_MULTIPLIER_VALUE] = new_value
+                        await self.async_update_zone_config(zone_id=zone_id, data=data)
+
+    async def handle_set_all_multipliers(self, call):
+        """Reset all multipliers to new value"""
+        if const.ATTR_NEW_MULTIPLIER_VALUE in call.data:
+            new_value = call.data[const.ATTR_NEW_MULTIPLIER_VALUE]
+            _LOGGER.info(
+                "Set all multipliers service called, new value: {}".format(new_value)
+            )
+            await self._async_set_all_multipliers(new_value)
+
     async def handle_clear_weatherdata(self, call):
         """Clear all collected weatherdata"""
         await self._async_clear_all_weatherdata()
@@ -1601,3 +1661,13 @@ def register_services(hass):
         const.SERVICE_CLEAR_WEATHERDATA,
         coordinator.handle_clear_weatherdata,
     )
+
+    hass.services.async_register(
+        const.DOMAIN,
+        const.SERVICE_SET_ALL_MULTIPLIERS,
+        coordinator.handle_set_all_multipliers,
+    )
+
+    hass.services.async_register(
+        const.DOMAIN, const.SERVICE_SET_MULTIPLIER, coordinator.handle_set_multiplier
+    )
diff --git a/custom_components/smart_irrigation/const.py b/custom_components/smart_irrigation/const.py
index 4c4cfbe2..a9ca7052 100644
--- a/custom_components/smart_irrigation/const.py
+++ b/custom_components/smart_irrigation/const.py
@@ -1,7 +1,7 @@
 """Store constants."""
 
 
-VERSION = "v2024.4.0"
+VERSION = "v2024.4.1"
 NAME = "Smart Irrigation"
 MANUFACTURER = "@jeroenterheerdt"
 
@@ -78,6 +78,8 @@
 ATTR_CALCULATE_ALL = "calculate_all"
 ATTR_SET_BUCKET = "set_bucket"
 ATTR_NEW_BUCKET_VALUE = "new_bucket_value"
+ATTR_SET_MULTIPLIER = "set_multiplier"
+ATTR_NEW_MULTIPLIER_VALUE = "new_multiplier_value"
 ATTR_UPDATE = "update"
 ATTR_UPDATE_ALL = "update_all"
 ATTR_OVERRIDE_CACHE = "override_cache"
@@ -237,5 +239,7 @@
 SERVICE_RESET_ALL_BUCKETS = "reset_all_buckets"
 SERVICE_SET_BUCKET = "set_bucket"
 SERVICE_SET_ALL_BUCKETS = "set_all_buckets"
+SERVICE_SET_MULTIPLIER = "set_multiplier"
+SERVICE_SET_ALL_MULTIPLIERS = "set_all_multipliers"
 SERVICE_ENTITY_ID = "entity_id"
 SERVICE_CLEAR_WEATHERDATA = "clear_all_weather_data"
diff --git a/custom_components/smart_irrigation/frontend/dist/smart-irrigation.js b/custom_components/smart_irrigation/frontend/dist/smart-irrigation.js
index b0354433..a337f16a 100644
--- a/custom_components/smart_irrigation/frontend/dist/smart-irrigation.js
+++ b/custom_components/smart_irrigation/frontend/dist/smart-irrigation.js
@@ -1057,7 +1057,7 @@ a.version="2.29.4",i(Wa),a.fn=us,a.min=Xa,a.max=Ja,a.now=Qa,a.utc=p,a.unix=cs,a.
             .narrow=${this.narrow}
           ></ha-menu-button>
           <div class="main-title">${hi("title",this.hass.language)}</div>
-          <div class="version">${"v2024.4.0"}</div>
+          <div class="version">${"v2024.4.1"}</div>
         </div>
 
         <ha-tabs
diff --git a/custom_components/smart_irrigation/frontend/src/const.ts b/custom_components/smart_irrigation/frontend/src/const.ts
index 2b9cb118..bba6b590 100644
--- a/custom_components/smart_irrigation/frontend/src/const.ts
+++ b/custom_components/smart_irrigation/frontend/src/const.ts
@@ -1,4 +1,4 @@
-export const VERSION = "v2024.4.0";
+export const VERSION = "v2024.4.1";
 export const REPO = "https://github.com/jeroenterheerdt/HASmartIrrigation;";
 export const ISSUES_URL = REPO + "/issues";
 
diff --git a/custom_components/smart_irrigation/manifest.json b/custom_components/smart_irrigation/manifest.json
index a05212b8..7143869d 100644
--- a/custom_components/smart_irrigation/manifest.json
+++ b/custom_components/smart_irrigation/manifest.json
@@ -8,5 +8,5 @@
   "iot_class": "local_push",
   "issue_tracker": "https://github.com/jeroenterheerdt/HASmartIrrigation/issues",
   "requirements": [],
-  "version": "v2024.4.0"
+  "version": "v2024.4.1"
 }
diff --git a/custom_components/smart_irrigation/services.yaml b/custom_components/smart_irrigation/services.yaml
index 212a8205..41d2dd4d 100644
--- a/custom_components/smart_irrigation/services.yaml
+++ b/custom_components/smart_irrigation/services.yaml
@@ -28,4 +28,19 @@ reset_bucket:
     entity:
       domain: sensor
 reset_all_buckets:
-clear_all_weather_data:
\ No newline at end of file
+clear_all_weather_data:
+set_all_multipliers:
+  fields:
+    new_multiplier_value:
+      required: true
+      example: 1.0
+      default: 1.0
+set_multiplier:
+  target:
+    entity:
+      domain: sensor
+  fields:
+    new_multiplier_value:
+      required: true
+      example: 1.0
+      default: 1.0
\ No newline at end of file
diff --git a/custom_components/smart_irrigation/store.py b/custom_components/smart_irrigation/store.py
index 1ecd33a5..2fe1c1d4 100644
--- a/custom_components/smart_irrigation/store.py
+++ b/custom_components/smart_irrigation/store.py
@@ -10,6 +10,7 @@
 
 from .const import (
     ATTR_NEW_BUCKET_VALUE,
+    ATTR_NEW_MULTIPLIER_VALUE,
     CONF_AUTO_CALC_ENABLED,
     CONF_AUTO_CLEAR_ENABLED,
     CONF_AUTO_UPDATE_DELAY,
@@ -498,6 +499,10 @@ def async_update_zone(self, zone_id: int, changes: dict) -> ZoneEntry:
         zone_id = int(zone_id)
         old = self.zones[zone_id]
         if changes:
+            # handle multiplier value change
+            if ATTR_NEW_MULTIPLIER_VALUE in changes:
+                changes[ZONE_MULTIPLIER] = changes[ATTR_NEW_MULTIPLIER_VALUE]
+                changes.pop(ATTR_NEW_MULTIPLIER_VALUE)
             # handle bucket value change
             if ATTR_NEW_BUCKET_VALUE in changes:
                 changes[ZONE_BUCKET] = changes[ATTR_NEW_BUCKET_VALUE]
diff --git a/custom_components/smart_irrigation/translations/en.json b/custom_components/smart_irrigation/translations/en.json
index da1e08c2..100ca33a 100644
--- a/custom_components/smart_irrigation/translations/en.json
+++ b/custom_components/smart_irrigation/translations/en.json
@@ -169,6 +169,30 @@
     "clear_all_weather_data": {
       "name": "Clear all weather data",
       "description": "Clear weather data for all zones"
+    },
+    "set_multiplier": {
+      "name": "Set multiplier",
+      "description": "Set multiplier for a zone to a specific value",
+      "fields": {
+        "entity": {
+          "name": "Entity",
+          "description": "Zone to set multiplier for"
+        },
+        "new_multiplier_value": {
+          "name": "New multiplier value",
+          "description": "new value of the multiplier"
+        }
+      }
+    },
+    "set_all_multipliers": {
+      "name": "Set all multipliers",
+      "description": "Set multipliers for all zones to a specific value",
+      "fields": {
+        "new_multiplier_value": {
+          "name": "New multiplier value",
+          "description": "new value of the multiplier"
+        }
+      }
     }
   }
 }