diff --git a/grafana/dashboard-immich.json b/grafana/dashboard-immich.json
index 0ab1fb3..3c8cc75 100644
--- a/grafana/dashboard-immich.json
+++ b/grafana/dashboard-immich.json
@@ -450,7 +450,7 @@
           },
           "editorMode": "code",
           "exemplar": false,
-          "expr": "immich_server_info_diskUsagePercentage",
+          "expr": "100 - immich_server_info_diskUsagePercentage",
           "format": "time_series",
           "instant": true,
           "interval": "",