diff --git a/homeassistant/components/overkiz/const.py b/homeassistant/components/overkiz/const.py
index e596b566717..1a89fecf9c0 100644
--- a/homeassistant/components/overkiz/const.py
+++ b/homeassistant/components/overkiz/const.py
@@ -142,8 +142,8 @@ OVERKIZ_UNIT_TO_HA: dict[str, str] = {
     MeasuredValueType.ELECTRICAL_POWER_IN_W: UnitOfPower.WATT,
     MeasuredValueType.ELECTRIC_CURRENT_IN_AMPERE: UnitOfElectricCurrent.AMPERE,
     MeasuredValueType.ELECTRIC_CURRENT_IN_MILLI_AMPERE: UnitOfElectricCurrent.MILLIAMPERE,
-    MeasuredValueType.ENERGY_IN_CAL: "cal",
-    MeasuredValueType.ENERGY_IN_KCAL: "kcal",
+    MeasuredValueType.ENERGY_IN_CAL: UnitOfEnergy.CALORIE,
+    MeasuredValueType.ENERGY_IN_KCAL: UnitOfEnergy.KILO_CALORIE,
     MeasuredValueType.FLOW_IN_LITRE_PER_SECOND: f"{UnitOfVolume.LITERS}/{UnitOfTime.SECONDS}",
     MeasuredValueType.FLOW_IN_METER_CUBE_PER_HOUR: UnitOfVolumeFlowRate.CUBIC_METERS_PER_HOUR,
     MeasuredValueType.FLOW_IN_METER_CUBE_PER_SECOND: f"{UnitOfVolume.CUBIC_METERS}/{UnitOfTime.SECONDS}",