diff --git a/Marlin/src/gcode/bedlevel/M420.cpp b/Marlin/src/gcode/bedlevel/M420.cpp
index 680d99fe469c..bfc2cf39f8df 100644
--- a/Marlin/src/gcode/bedlevel/M420.cpp
+++ b/Marlin/src/gcode/bedlevel/M420.cpp
@@ -74,7 +74,7 @@ void GcodeSuite::M420() {
         start.set(x_min, y_min);
         spacing.set((x_max - x_min) / (GRID_MAX_CELLS_X),
                     (y_max - y_min) / (GRID_MAX_CELLS_Y));
-        bedlevel.set_grid(spacing, start);
+        bedlevel.set_grid(spacing, Probe::convert_to_nozzle_xy(start));
       #endif
       GRID_LOOP(x, y) {
         bedlevel.z_values[x][y] = 0.001 * random(-200, 200);
diff --git a/Marlin/src/gcode/bedlevel/abl/G29.cpp b/Marlin/src/gcode/bedlevel/abl/G29.cpp
index 77809605a4ac..5da442efb4bc 100644
--- a/Marlin/src/gcode/bedlevel/abl/G29.cpp
+++ b/Marlin/src/gcode/bedlevel/abl/G29.cpp
@@ -520,7 +520,9 @@ G29_TYPE GcodeSuite::G29() {
     #endif
 
     #if ENABLED(AUTO_BED_LEVELING_BILINEAR)
-      if (!abl.dryrun && (abl.gridSpacing != bedlevel.grid_spacing || abl.probe_position_lf != bedlevel.grid_start)) {
+      // Convert the probe-space grid origin to the motion/nozzle coordinate
+      const xy_pos_t grid_start = Probe::convert_to_nozzle_xy(abl.probe_position_lf);
+      if (!abl.dryrun && (abl.gridSpacing != bedlevel.grid_spacing || grid_start != bedlevel.grid_start)) {
         reset_bed_level();      // Reset grid to 0.0 or "not probed". (Also disables ABL)
         abl.reenable = false;   // Can't re-enable (on error) until the new grid is written
       }
@@ -883,7 +885,7 @@ G29_TYPE GcodeSuite::G29() {
       if (abl.dryrun)
         bedlevel.print_leveling_grid(&abl.z_values);
       else {
-        bedlevel.set_grid(abl.gridSpacing, abl.probe_position_lf);
+        bedlevel.set_grid(abl.gridSpacing, Probe::convert_to_nozzle_xy(abl.probe_position_lf));
         COPY(bedlevel.z_values, abl.z_values);
         TERN_(IS_KINEMATIC, bedlevel.extrapolate_unprobed_bed_level());
         bedlevel.refresh_bed_level();
diff --git a/Marlin/src/module/probe.h b/Marlin/src/module/probe.h
index 4f2a10eb1aac..3f4cde94b472 100644
--- a/Marlin/src/module/probe.h
+++ b/Marlin/src/module/probe.h
@@ -244,6 +244,11 @@ class Probe {
     static constexpr xy_pos_t offset_xy = xy_pos_t({ 0, 0 });   // See #16767
   #endif
 
+  // Convert a probe-space XY point to the active nozzle's motion-space coordinates.
+  static xy_pos_t convert_to_nozzle_xy(const xy_pos_t &probe_xy) {
+    return probe_xy - DIFF_TERN(HAS_HOTEND_OFFSET, offset_xy, xy_pos_t(motion.active_hotend_offset()));
+  }
+
   static bool deploy(const bool no_return=false) { return set_deployed(true, no_return); }
   static bool stow(const bool no_return=false)   { return set_deployed(false, no_return); }