diff --git a/Marlin/src/feature/bedlevel/ubl/ubl.h b/Marlin/src/feature/bedlevel/ubl/ubl.h
index cbd5ed4bf6..2db2b4dd7a 100644
--- a/Marlin/src/feature/bedlevel/ubl/ubl.h
+++ b/Marlin/src/feature/bedlevel/ubl/ubl.h
@@ -215,7 +215,7 @@ class unified_bed_leveling {
      * z_correction_for_x_on_horizontal_mesh_line is an optimization for
      * the case where the printer is making a vertical line that only crosses horizontal mesh lines.
      */
-    inline static float z_correction_for_x_on_horizontal_mesh_line(const float &rx0, const int x1_i, const int yi) {
+    static inline float z_correction_for_x_on_horizontal_mesh_line(const float &rx0, const int x1_i, const int yi) {
       if (!WITHIN(x1_i, 0, GRID_MAX_POINTS_X - 1) || !WITHIN(yi, 0, GRID_MAX_POINTS_Y - 1)) {
         #if ENABLED(DEBUG_LEVELING_FEATURE)
           if (DEBUGGING(LEVELING)) {
@@ -249,7 +249,7 @@ class unified_bed_leveling {
     //
     // See comments above for z_correction_for_x_on_horizontal_mesh_line
     //
-    inline static float z_correction_for_y_on_vertical_mesh_line(const float &ry0, const int xi, const int y1_i) {
+    static inline float z_correction_for_y_on_vertical_mesh_line(const float &ry0, const int xi, const int y1_i) {
       if (!WITHIN(xi, 0, GRID_MAX_POINTS_X - 1) || !WITHIN(y1_i, 0, GRID_MAX_POINTS_Y - 1)) {
         #if ENABLED(DEBUG_LEVELING_FEATURE)
           if (DEBUGGING(LEVELING)) {
@@ -362,7 +362,7 @@ class unified_bed_leveling {
       static void line_to_destination_cartesian(const float &fr, const uint8_t e);
     #endif
 
-    inline static bool mesh_is_valid() {
+    static inline bool mesh_is_valid() {
       for (uint8_t x = 0; x < GRID_MAX_POINTS_X; x++)
         for (uint8_t y = 0; y < GRID_MAX_POINTS_Y; y++)
           if (isnan(z_values[x][y])) return false;
diff --git a/Marlin/src/gcode/parser.h b/Marlin/src/gcode/parser.h
index 82843d6226..1665304f77 100644
--- a/Marlin/src/gcode/parser.h
+++ b/Marlin/src/gcode/parser.h
@@ -175,10 +175,10 @@ public:
   FORCE_INLINE static bool has_value() { return value_ptr != NULL; }
 
   // Seen a parameter with a value
-  inline static bool seenval(const char c) { return seen(c) && has_value(); }
+  static inline bool seenval(const char c) { return seen(c) && has_value(); }
 
   // Float removes 'E' to prevent scientific notation interpretation
-  inline static float value_float() {
+  static inline float value_float() {
     if (value_ptr) {
       char *e = value_ptr;
       for (;;) {
@@ -198,8 +198,8 @@ public:
   }
 
   // Code value as a long or ulong
-  inline static int32_t value_long() { return value_ptr ? strtol(value_ptr, NULL, 10) : 0L; }
-  inline static uint32_t value_ulong() { return value_ptr ? strtoul(value_ptr, NULL, 10) : 0UL; }
+  static inline int32_t value_long() { return value_ptr ? strtol(value_ptr, NULL, 10) : 0L; }
+  static inline uint32_t value_ulong() { return value_ptr ? strtoul(value_ptr, NULL, 10) : 0UL; }
 
   // Code value for use as time
   FORCE_INLINE static millis_t value_millis() { return value_ulong(); }
@@ -208,10 +208,10 @@ public:
   // Reduce to fewer bits
   FORCE_INLINE static int16_t value_int() { return (int16_t)value_long(); }
   FORCE_INLINE static uint16_t value_ushort() { return (uint16_t)value_long(); }
-  inline static uint8_t value_byte() { return (uint8_t)constrain(value_long(), 0, 255); }
+  static inline uint8_t value_byte() { return (uint8_t)constrain(value_long(), 0, 255); }
 
   // Bool is true with no value or non-zero
-  inline static bool value_bool() { return !has_value() || !!value_byte(); }
+  static inline bool value_bool() { return !has_value() || !!value_byte(); }
 
   // Units modes: Inches, Fahrenheit, Kelvin
 
@@ -220,7 +220,7 @@ public:
     // Init linear units by constructor
     GCodeParser() { set_input_linear_units(LINEARUNIT_MM); }
 
-    inline static void set_input_linear_units(const LinearUnit units) {
+    static inline void set_input_linear_units(const LinearUnit units) {
       switch (units) {
         case LINEARUNIT_INCH:
           linear_unit_factor = 25.4f;
@@ -233,13 +233,13 @@ public:
       volumetric_unit_factor = POW(linear_unit_factor, 3);
     }
 
-    inline static float axis_unit_factor(const AxisEnum axis) {
+    static inline float axis_unit_factor(const AxisEnum axis) {
       return (axis >= E_AXIS && volumetric_enabled ? volumetric_unit_factor : linear_unit_factor);
     }
 
-    inline static float value_linear_units()                     { return value_float() * linear_unit_factor; }
-    inline static float value_axis_units(const AxisEnum axis)    { return value_float() * axis_unit_factor(axis); }
-    inline static float value_per_axis_unit(const AxisEnum axis) { return value_float() / axis_unit_factor(axis); }
+    static inline float value_linear_units()                     { return value_float() * linear_unit_factor; }
+    static inline float value_axis_units(const AxisEnum axis)    { return value_float() * axis_unit_factor(axis); }
+    static inline float value_per_axis_unit(const AxisEnum axis) { return value_float() / axis_unit_factor(axis); }
 
   #else
 
@@ -251,7 +251,7 @@ public:
 
   #if ENABLED(TEMPERATURE_UNITS_SUPPORT)
 
-    inline static void set_input_temp_units(TempUnit units) { input_temp_units = units; }
+    static inline void set_input_temp_units(TempUnit units) { input_temp_units = units; }
 
     #if ENABLED(ULTIPANEL) && DISABLED(DISABLE_M503)
 
@@ -261,7 +261,7 @@ public:
       FORCE_INLINE static const char* temp_units_name() {
         return input_temp_units == TEMPUNIT_K ? PSTR("Kelvin") : input_temp_units == TEMPUNIT_F ? PSTR("Fahrenheit") : PSTR("Celsius");
       }
-      inline static float to_temp_units(const float &f) {
+      static inline float to_temp_units(const float &f) {
         switch (input_temp_units) {
           case TEMPUNIT_F:
             return f * 0.5555555556f + 32;
@@ -275,7 +275,7 @@ public:
 
     #endif // ULTIPANEL && !DISABLE_M503
 
-    inline static float value_celsius() {
+    static inline float value_celsius() {
       const float f = value_float();
       switch (input_temp_units) {
         case TEMPUNIT_F:
@@ -288,7 +288,7 @@ public:
       }
     }
 
-    inline static float value_celsius_diff() {
+    static inline float value_celsius_diff() {
       switch (input_temp_units) {
         case TEMPUNIT_F:
           return value_float() * 0.5555555556f;
diff --git a/Marlin/src/libs/buzzer.h b/Marlin/src/libs/buzzer.h
index 9cc23695c7..2da9b8dee7 100644
--- a/Marlin/src/libs/buzzer.h
+++ b/Marlin/src/libs/buzzer.h
@@ -82,7 +82,7 @@ class Buzzer {
      * @brief Resets the state of the class
      * @details Brings the class state to a known one.
      */
-    inline static void reset() {
+    static inline void reset() {
       off();
       state.endtime = 0;
     }
diff --git a/Marlin/src/module/planner.h b/Marlin/src/module/planner.h
index c362bf0f4b..8a639a0431 100644
--- a/Marlin/src/module/planner.h
+++ b/Marlin/src/module/planner.h
@@ -361,7 +361,7 @@ class Planner {
        *  Returns 1.0 if planner.z_fade_height is 0.0.
        *  Returns 0.0 if Z is past the specified 'Fade Height'.
        */
-      inline static float fade_scaling_factor_for_z(const float &rz) {
+      static inline float fade_scaling_factor_for_z(const float &rz) {
         static float z_fade_factor = 1;
         if (z_fade_height) {
           if (rz >= z_fade_height) return 0;
diff --git a/Marlin/src/module/planner_bezier.cpp b/Marlin/src/module/planner_bezier.cpp
index 407d8a0670..6ff6808a79 100644
--- a/Marlin/src/module/planner_bezier.cpp
+++ b/Marlin/src/module/planner_bezier.cpp
@@ -45,7 +45,7 @@
 #define SIGMA 0.1f
 
 // Compute the linear interpolation between two real numbers.
-inline static float interp(float a, float b, float t) { return (1 - t) * a + t * b; }
+static inline float interp(const float &a, const float &b, const float &t) { return (1 - t) * a + t * b; }
 
 /**
  * Compute a Bézier curve using the De Casteljau's algorithm (see
@@ -53,21 +53,20 @@ inline static float interp(float a, float b, float t) { return (1 - t) * a + t *
  * easy to code and has good numerical stability (very important,
  * since Arudino works with limited precision real numbers).
  */
-inline static float eval_bezier(float a, float b, float c, float d, float t) {
-  float iab = interp(a, b, t);
-  float ibc = interp(b, c, t);
-  float icd = interp(c, d, t);
-  float iabc = interp(iab, ibc, t);
-  float ibcd = interp(ibc, icd, t);
-  float iabcd = interp(iabc, ibcd, t);
-  return iabcd;
+static inline float eval_bezier(const float &a, const float &b, const float &c, const float &d, const float &t) {
+  const float iab = interp(a, b, t),
+              ibc = interp(b, c, t),
+              icd = interp(c, d, t),
+              iabc = interp(iab, ibc, t),
+              ibcd = interp(ibc, icd, t);
+  return interp(iabc, ibcd, t);
 }
 
 /**
  * We approximate Euclidean distance with the sum of the coordinates
  * offset (so-called "norm 1"), which is quicker to compute.
  */
-inline static float dist1(float x1, float y1, float x2, float y2) { return ABS(x1 - x2) + ABS(y1 - y2); }
+static inline float dist1(const float &x1, const float &y1, const float &x2, const float &y2) { return ABS(x1 - x2) + ABS(y1 - y2); }
 
 /**
  * The algorithm for computing the step is loosely based on the one in Kig
diff --git a/Marlin/src/module/stepper.h b/Marlin/src/module/stepper.h
index 2280bb78b8..7e9f9cbe17 100644
--- a/Marlin/src/module/stepper.h
+++ b/Marlin/src/module/stepper.h
@@ -435,7 +435,7 @@ class Stepper {
     #endif
 
     // Set the current position in steps
-    inline static void set_position(const int32_t &a, const int32_t &b, const int32_t &c, const int32_t &e) {
+    static inline void set_position(const int32_t &a, const int32_t &b, const int32_t &c, const int32_t &e) {
       planner.synchronize();
       const bool was_enabled = STEPPER_ISR_ENABLED();
       if (was_enabled) DISABLE_STEPPER_DRIVER_INTERRUPT();
@@ -443,7 +443,7 @@ class Stepper {
       if (was_enabled) ENABLE_STEPPER_DRIVER_INTERRUPT();
     }
 
-    inline static void set_position(const AxisEnum a, const int32_t &v) {
+    static inline void set_position(const AxisEnum a, const int32_t &v) {
       planner.synchronize();
 
       #ifdef __AVR__