diff --git a/Marlin/Configuration.h b/Marlin/Configuration.h
index aacd69295..9b77f96f4 100644
--- a/Marlin/Configuration.h
+++ b/Marlin/Configuration.h
@@ -435,20 +435,20 @@ const bool Z_MAX_ENDSTOP_INVERTING = true; // set to true to invert the logic of
 
   #ifdef AUTO_BED_LEVELING_GRID	// Check if Probe_Offset * Grid Points is greater than Probing Range
     #if X_PROBE_OFFSET_FROM_EXTRUDER < 0
-      #if (-(X_PROBE_OFFSET_FROM_EXTRUDER * AUTO_BED_LEVELING_GRID_POINTS) >= (RIGHT_PROBE_BED_POSITION - LEFT_PROBE_BED_POSITION))
+      #if (-(X_PROBE_OFFSET_FROM_EXTRUDER * (AUTO_BED_LEVELING_GRID_POINTS-1)) >= (RIGHT_PROBE_BED_POSITION - LEFT_PROBE_BED_POSITION))
 	     #error "The X axis probing range is not enough to fit all the points defined in AUTO_BED_LEVELING_GRID_POINTS"
 	  #endif
 	#else
-      #if ((X_PROBE_OFFSET_FROM_EXTRUDER * AUTO_BED_LEVELING_GRID_POINTS) >= (RIGHT_PROBE_BED_POSITION - LEFT_PROBE_BED_POSITION))
+      #if ((X_PROBE_OFFSET_FROM_EXTRUDER * (AUTO_BED_LEVELING_GRID_POINTS-1)) >= (RIGHT_PROBE_BED_POSITION - LEFT_PROBE_BED_POSITION))
 	     #error "The X axis probing range is not enough to fit all the points defined in AUTO_BED_LEVELING_GRID_POINTS"
 	  #endif
 	#endif
     #if Y_PROBE_OFFSET_FROM_EXTRUDER < 0
-      #if (-(Y_PROBE_OFFSET_FROM_EXTRUDER * AUTO_BED_LEVELING_GRID_POINTS) >= (BACK_PROBE_BED_POSITION - FRONT_PROBE_BED_POSITION))
+      #if (-(Y_PROBE_OFFSET_FROM_EXTRUDER * (AUTO_BED_LEVELING_GRID_POINTS-1)) >= (BACK_PROBE_BED_POSITION - FRONT_PROBE_BED_POSITION))
 	     #error "The Y axis probing range is not enough to fit all the points defined in AUTO_BED_LEVELING_GRID_POINTS"
 	  #endif
 	#else
-      #if ((Y_PROBE_OFFSET_FROM_EXTRUDER * AUTO_BED_LEVELING_GRID_POINTS) >= (BACK_PROBE_BED_POSITION - FRONT_PROBE_BED_POSITION))
+      #if ((Y_PROBE_OFFSET_FROM_EXTRUDER * (AUTO_BED_LEVELING_GRID_POINTS-1)) >= (BACK_PROBE_BED_POSITION - FRONT_PROBE_BED_POSITION))
 	     #error "The Y axis probing range is not enough to fit all the points defined in AUTO_BED_LEVELING_GRID_POINTS"
 	  #endif
 	#endif