diff --git a/homeassistant/components/climacell/const.py b/homeassistant/components/climacell/const.py
index f19724b002e..c11c0b1774b 100644
--- a/homeassistant/components/climacell/const.py
+++ b/homeassistant/components/climacell/const.py
@@ -158,7 +158,7 @@ class ClimaCellSensorMetadata:
     name: str
     unit_imperial: str | None = None
     unit_metric: str | None = None
-    metric_conversion: Callable | float = 1.0
+    metric_conversion: Callable[[float], float] | float = 1.0
     is_metric_check: bool | None = None
     device_class: str | None = None
     value_map: IntEnum | None = None