diff --git a/kivy/uix/slider.py b/kivy/uix/slider.py
index e40331ddc..7e9d5b57c 100644
--- a/kivy/uix/slider.py
+++ b/kivy/uix/slider.py
@@ -154,18 +154,19 @@ class Slider(Widget):
             return (x, y + padding + nval * (self.height - 2 * padding))
 
     def set_value_pos(self, pos):
-        x = min(self.right, max(pos[0], self.x))
-        y = min(self.top, max(pos[1], self.y))
+        padding = self.padding
+        x = min(self.right - padding, max(pos[0], self.x + padding))
+        y = min(self.top - padding, max(pos[1], self.y + padding))
         if self.orientation == 'horizontal':
             if self.width == 0:
                 self.value_normalized = 0
             else:
-                self.value_normalized = (x - self.x) / float(self.width)
+                self.value_normalized = (x - self.x - padding) / float(self.width - 2 * padding)
         else:
             if self.height == 0:
                 self.value_normalized = 0
             else:
-                self.value_normalized = (y - self.y) / float(self.height)
+                self.value_normalized = (y - self.y - padding) / float(self.height - 2 * padding)
     value_pos = AliasProperty(get_value_pos, set_value_pos,
                               bind=('x', 'y', 'width', 'height', 'min',
                                     'max', 'value_normalized', 'orientation'))