diff --git a/intern/ghost/GHOST_Types.h b/intern/ghost/GHOST_Types.h
index d04081f6d26..5f408f7dd08 100644
--- a/intern/ghost/GHOST_Types.h
+++ b/intern/ghost/GHOST_Types.h
@@ -165,8 +165,8 @@ typedef enum {
 typedef struct GHOST_TabletData {
   GHOST_TTabletMode Active; /* 0=None, 1=Stylus, 2=Eraser */
   float Pressure;           /* range 0.0 (not touching) to 1.0 (full pressure) */
-  float Xtilt; /* range 0.0 (upright) to 1.0 (tilted fully against the tablet surface) */
-  float Ytilt; /* as above */
+  float Xtilt;              /* range -1.0 (left) to +1.0 (right) */
+  float Ytilt;              /* range -1.0 (toward user) to +1.0 (away from user) */
 } GHOST_TabletData;
 
 static const GHOST_TabletData GHOST_TABLET_DATA_NONE = {
diff --git a/intern/ghost/intern/GHOST_SystemCocoa.mm b/intern/ghost/intern/GHOST_SystemCocoa.mm
index 5ff6af1ab05..c9f56cc4a8f 100644
--- a/intern/ghost/intern/GHOST_SystemCocoa.mm
+++ b/intern/ghost/intern/GHOST_SystemCocoa.mm
@@ -1481,9 +1481,10 @@ GHOST_TSuccess GHOST_SystemCocoa::handleTabletEvent(void *eventPtr, short eventT
       }
 
       ct.Pressure = event.pressure;
+      /* Range: -1 (left) to 1 (right). */
       ct.Xtilt = event.tilt.x;
-      /* On macOS, the y tilt behavior is inverted; an increase in the tilt
-       * value corresponds to tilting the device away from the user. */
+      /* On macOS, the y tilt behavior is inverted from what we expect: negative
+       * meaning a tilt toward the user, positive meaning away from the user. */
       ct.Ytilt = -event.tilt.y;
       break;
 
diff --git a/intern/ghost/intern/GHOST_SystemWayland.cc b/intern/ghost/intern/GHOST_SystemWayland.cc
index 945da9f1c0e..43f53c46fc6 100644
--- a/intern/ghost/intern/GHOST_SystemWayland.cc
+++ b/intern/ghost/intern/GHOST_SystemWayland.cc
@@ -4791,10 +4791,10 @@ static void tablet_tool_handle_tilt(void *data,
                                     const wl_fixed_t tilt_x,
                                     const wl_fixed_t tilt_y)
 {
-  /* Map degrees to `-1.0..1.0`. */
+  /* Map degrees to `-1.0 (left/back)..1.0 (right/forward)`. */
   const float tilt_unit[2] = {
-      float(wl_fixed_to_double(tilt_x) / 90.0),
-      float(wl_fixed_to_double(tilt_y) / 90.0),
+      float(wl_fixed_to_double(tilt_x) / 90.0f),
+      float(wl_fixed_to_double(tilt_y) / -90.0f),
   };
   CLOG_INFO(LOG, 2, "tilt (x=%.4f, y=%.4f)", UNPACK2(tilt_unit));
   GWL_TabletTool *tablet_tool = static_cast<GWL_TabletTool *>(data);
diff --git a/intern/ghost/intern/GHOST_WindowWin32.cc b/intern/ghost/intern/GHOST_WindowWin32.cc
index 13f9b6ad5eb..54926323aba 100644
--- a/intern/ghost/intern/GHOST_WindowWin32.cc
+++ b/intern/ghost/intern/GHOST_WindowWin32.cc
@@ -6,12 +6,14 @@
  * \ingroup GHOST
  */
 
-#include "GHOST_WindowWin32.hh"
+#include <algorithm>
+
 #include "GHOST_ContextD3D.hh"
 #include "GHOST_ContextNone.hh"
 #include "GHOST_DropTargetWin32.hh"
 #include "GHOST_SystemWin32.hh"
 #include "GHOST_WindowManager.hh"
+#include "GHOST_WindowWin32.hh"
 #include "utf_winfunc.hh"
 #include "utfconv.hh"
 
@@ -1022,11 +1024,19 @@ GHOST_TSuccess GHOST_WindowWin32::getPointerInfo(
     }
 
     if (pointerPenInfo[i].penMask & PEN_MASK_TILT_X) {
-      outPointerInfo[i].tabletData.Xtilt = fmin(fabs(pointerPenInfo[i].tiltX / 90.0f), 1.0f);
+      /* Input value is a range of -90 to +90, with a positive value
+       * indicating a tilt to the right. Convert to what Blender
+       * expects: -1.0f (left) to +1.0f (right). */
+      outPointerInfo[i].tabletData.Xtilt = std::clamp(
+          pointerPenInfo[i].tiltX / 90.0f, -1.0f, 1.0f);
     }
 
     if (pointerPenInfo[i].penMask & PEN_MASK_TILT_Y) {
-      outPointerInfo[i].tabletData.Ytilt = fmin(fabs(pointerPenInfo[i].tiltY / 90.0f), 1.0f);
+      /* Input value is a range of -90 to +90, with a positive value
+       * indicating a tilt toward the user. Convert to what Blender
+       * expects: -1.0f (toward user) to +1.0f (away from user). */
+      outPointerInfo[i].tabletData.Ytilt = std::clamp(
+          pointerPenInfo[i].tiltY / -90.0f, -1.0f, 1.0f);
     }
   }
 
diff --git a/source/blender/makesrna/intern/rna_brush.cc b/source/blender/makesrna/intern/rna_brush.cc
index f34da6e645c..83e6aeab645 100644
--- a/source/blender/makesrna/intern/rna_brush.cc
+++ b/source/blender/makesrna/intern/rna_brush.cc
@@ -3937,12 +3937,12 @@ static void rna_def_operator_stroke_element(BlenderRNA *brna)
   prop = RNA_def_property(srna, "x_tilt", PROP_FLOAT, PROP_FACTOR);
   RNA_def_property_flag(prop, PROP_IDPROPERTY);
   RNA_def_property_range(prop, -1.0f, 1.0f);
-  RNA_def_property_ui_text(prop, "Tilt X", "");
+  RNA_def_property_ui_text(prop, "Tilt X", "Pen tilt from left (-1.0) to right (+1.0)");
 
   prop = RNA_def_property(srna, "y_tilt", PROP_FLOAT, PROP_FACTOR);
   RNA_def_property_flag(prop, PROP_IDPROPERTY);
   RNA_def_property_range(prop, -1.0f, 1.0f);
-  RNA_def_property_ui_text(prop, "Tilt Y", "");
+  RNA_def_property_ui_text(prop, "Tilt Y", "Pen tilt from forward (-1.0) to back (+1.0)");
 
   /* used in uv painting */
   prop = RNA_def_property(srna, "time", PROP_FLOAT, PROP_UNSIGNED);
diff --git a/source/blender/windowmanager/WM_types.hh b/source/blender/windowmanager/WM_types.hh
index 36bafdec0fe..d62fbd8f783 100644
--- a/source/blender/windowmanager/WM_types.hh
+++ b/source/blender/windowmanager/WM_types.hh
@@ -700,9 +700,9 @@ struct wmTabletData {
   int active;
   /** Range 0.0 (not touching) to 1.0 (full pressure). */
   float pressure;
-  /** Range 0.0 (upright) to 1.0 (tilted fully against the tablet surface). */
+  /** range -1.0 (left) to +1.0 (right). */
   float x_tilt;
-  /** As above. */
+  /** range -1.0 (toward user) to +1.0 (away from user). */
   float y_tilt;
   /** Interpret mouse motion as absolute as typical for tablets. */
   char is_motion_absolute;