diff --git a/containment/package/contents/ui/ConfigOverlay.qml b/containment/package/contents/ui/ConfigOverlay.qml
index 77729b5f8..91f0c2e59 100644
--- a/containment/package/contents/ui/ConfigOverlay.qml
+++ b/containment/package/contents/ui/ConfigOverlay.qml
@@ -471,6 +471,15 @@ MouseArea {
                         anchors.rightMargin: units.smallSpacing
                         textFormat: Text.PlainText
                         maximumLineCount: 1
+
+                        //! update value of maxLength in tooltip
+                        Binding{
+                            target: label
+                            property: "text"
+                            when: currentApplet === ruler
+                            value: ruler.tooltip
+                        }
+
                     }
 
                     PlasmaComponents.ToolButton{
diff --git a/containment/package/contents/ui/Ruler.qml b/containment/package/contents/ui/Ruler.qml
index 00446dd63..d2b59b36f 100644
--- a/containment/package/contents/ui/Ruler.qml
+++ b/containment/package/contents/ui/Ruler.qml
@@ -41,7 +41,7 @@ Item{
     readonly property bool containsMouse: rulerMouseArea.containsMouse
     readonly property int thickness: theme.defaultFont.pixelSize + rMargin
 
-    readonly property string tooltip: i18n("You can use mouse wheel to change the maximum length")
+    readonly property string tooltip: i18nc("maximum length tooltip, %0% is maximum length percentage","You can use mouse wheel to change maximum length of %0%").arg(plasmoid.configuration.maxLength)
 
     x: {
         if (root.isHorizontal) {