diff --git a/homeassistant/util/unit_conversion.py b/homeassistant/util/unit_conversion.py
index f559512c1a7..e4312a7865f 100644
--- a/homeassistant/util/unit_conversion.py
+++ b/homeassistant/util/unit_conversion.py
@@ -151,8 +151,8 @@ class BaseUnitConverter:
         cls, from_unit: str | None, to_unit: str | None
     ) -> float:
         """Get floored base10 log ratio between units of measurement."""
-        from_ratio, to_ratio = cls._get_from_to_ratio(from_unit, to_unit)
-        return floor(max(0, log10(from_ratio / to_ratio)))
+        ratio = cls.get_unit_ratio(from_unit, to_unit)
+        return floor(max(0, log10(ratio)))
 
     @classmethod
     @lru_cache