diff --git a/hwmonDaemon.py b/hwmonDaemon.py
index 2bf075a..7ce7b92 100644
--- a/hwmonDaemon.py
+++ b/hwmonDaemon.py
@@ -1376,10 +1376,9 @@ class SystemHealthMonitor:
                                         logger.debug(f"Skipping excluded mountpoint: {mountpoint}")
                                     continue
                                 
-                                # Get usage percentage directly from parts[4]
-                                usage_percent = float(parts[4].rstrip('%'))
                                 size_value = self._convert_size_to_bytes(parts[1])  # For total size
                                 used_value = self._convert_size_to_bytes(parts[2])  # For used size
+                                usage_percent = (used_size / total_size) * 100 if total_size > 0 else 0
                                 filesystem = {
                                     'mountpoint': mountpoint,
                                     'total': parts[1],