diff --git a/Marlin/src/feature/leds/printer_event_leds.cpp b/Marlin/src/feature/leds/printer_event_leds.cpp
index fe7db9a8e4..4765f82e56 100644
--- a/Marlin/src/feature/leds/printer_event_leds.cpp
+++ b/Marlin/src/feature/leds/printer_event_leds.cpp
@@ -40,9 +40,9 @@ PrinterEventLEDs printerEventLEDs;
 
   uint8_t PrinterEventLEDs::old_intensity = 0;
 
-  inline uint8_t pel_intensity(const_float_t start, const_float_t current, const_float_t target) {
-    if (uint16_t(start) == uint16_t(target)) return 255;
-    return (uint8_t)map(constrain(current, start, target), start, target, 0.f, 255.f);
+  inline uint8_t pel_intensity(const celsius_t start, const celsius_t current, const celsius_t target) {
+    if (start == target) return 255;
+    return (uint8_t)map(constrain(current, start, target), start, target, 0, 255);
   }
 
   inline void pel_set_rgb(const uint8_t r, const uint8_t g, const uint8_t b) {
@@ -58,7 +58,7 @@ PrinterEventLEDs printerEventLEDs;
 
 #if HAS_TEMP_HOTEND
 
-  void PrinterEventLEDs::onHotendHeating(const_float_t start, const_float_t current, const_float_t target) {
+  void PrinterEventLEDs::onHotendHeating(const celsius_t start, const celsius_t current, const celsius_t target) {
     const uint8_t blue = pel_intensity(start, current, target);
     if (blue != old_intensity) {
       old_intensity = blue;
@@ -70,7 +70,7 @@ PrinterEventLEDs printerEventLEDs;
 
 #if HAS_HEATED_BED
 
-  void PrinterEventLEDs::onBedHeating(const_float_t start, const_float_t current, const_float_t target) {
+  void PrinterEventLEDs::onBedHeating(const celsius_t start, const celsius_t current, const celsius_t target) {
     const uint8_t red = pel_intensity(start, current, target);
     if (red != old_intensity) {
       old_intensity = red;
@@ -82,7 +82,7 @@ PrinterEventLEDs printerEventLEDs;
 
 #if HAS_HEATED_CHAMBER
 
-  void PrinterEventLEDs::onChamberHeating(const_float_t start, const_float_t current, const_float_t target) {
+  void PrinterEventLEDs::onChamberHeating(const celsius_t start, const celsius_t current, const celsius_t target) {
     const uint8_t green = pel_intensity(start, current, target);
     if (green != old_intensity) {
       old_intensity = green;
diff --git a/Marlin/src/feature/leds/printer_event_leds.h b/Marlin/src/feature/leds/printer_event_leds.h
index 2e1e589730..b2201433d8 100644
--- a/Marlin/src/feature/leds/printer_event_leds.h
+++ b/Marlin/src/feature/leds/printer_event_leds.h
@@ -41,21 +41,21 @@ private:
 public:
   #if HAS_TEMP_HOTEND
     static inline LEDColor onHotendHeatingStart() { old_intensity = 0; return leds.get_color(); }
-    static void onHotendHeating(const_float_t start, const_float_t current, const_float_t target);
+    static void onHotendHeating(const celsius_t start, const celsius_t current, const celsius_t target);
   #endif
 
   #if HAS_HEATED_BED
     static inline LEDColor onBedHeatingStart() { old_intensity = 127; return leds.get_color(); }
-    static void onBedHeating(const_float_t start, const_float_t current, const_float_t target);
+    static void onBedHeating(const celsius_t start, const celsius_t current, const celsius_t target);
   #endif
 
   #if HAS_HEATED_CHAMBER
     static inline LEDColor onChamberHeatingStart() { old_intensity = 127; return leds.get_color(); }
-    static void onChamberHeating(const_float_t start, const_float_t current, const_float_t target);
+    static void onChamberHeating(const celsius_t start, const celsius_t current, const celsius_t target);
   #endif
 
   #if HAS_TEMP_HOTEND || HAS_HEATED_BED || HAS_HEATED_CHAMBER
-    static inline void onHeatingDone() { leds.set_white(); }
+    static inline void onHeatingDone()             { leds.set_white(); }
     static inline void onPidTuningDone(LEDColor c) { leds.set_color(c); }
   #endif
 
diff --git a/Marlin/src/feature/leds/tempstat.cpp b/Marlin/src/feature/leds/tempstat.cpp
index 880258f852..967b9f4d81 100644
--- a/Marlin/src/feature/leds/tempstat.cpp
+++ b/Marlin/src/feature/leds/tempstat.cpp
@@ -36,10 +36,10 @@ void handle_status_leds() {
   static millis_t next_status_led_update_ms = 0;
   if (ELAPSED(millis(), next_status_led_update_ms)) {
     next_status_led_update_ms += 500; // Update every 0.5s
-    float max_temp = TERN0(HAS_HEATED_BED, _MAX(thermalManager.degTargetBed(), thermalManager.degBed()));
+    celsius_t max_temp = TERN0(HAS_HEATED_BED, _MAX(thermalManager.degTargetBed(), thermalManager.wholeDegBed()));
     HOTEND_LOOP()
-      max_temp = _MAX(max_temp, thermalManager.degHotend(e), thermalManager.degTargetHotend(e));
-    const int8_t new_red = (max_temp > 55.0) ? HIGH : (max_temp < 54.0 || old_red < 0) ? LOW : old_red;
+      max_temp = _MAX(max_temp, thermalManager.wholeDegHotend(e), thermalManager.degTargetHotend(e));
+    const int8_t new_red = (max_temp > 55) ? HIGH : (max_temp < 54 || old_red < 0) ? LOW : old_red;
     if (new_red != old_red) {
       old_red = new_red;
       #if PIN_EXISTS(STAT_LED_RED)
diff --git a/Marlin/src/feature/pause.cpp b/Marlin/src/feature/pause.cpp
index 192c7f6345..6552eaa42c 100644
--- a/Marlin/src/feature/pause.cpp
+++ b/Marlin/src/feature/pause.cpp
@@ -143,7 +143,7 @@ static bool ensure_safe_temperature(const bool wait=true, const PauseMode mode=P
 
   // Allow interruption by Emergency Parser M108
   wait_for_heatup = TERN1(PREVENT_COLD_EXTRUSION, !thermalManager.allow_cold_extrude);
-  while (wait_for_heatup && ABS(thermalManager.degHotend(active_extruder) - thermalManager.degTargetHotend(active_extruder)) > TEMP_WINDOW)
+  while (wait_for_heatup && ABS(thermalManager.wholeDegHotend(active_extruder) - thermalManager.degTargetHotend(active_extruder)) > (TEMP_WINDOW))
     idle();
   wait_for_heatup = false;
 
diff --git a/Marlin/src/feature/probe_temp_comp.cpp b/Marlin/src/feature/probe_temp_comp.cpp
index edb33da8ce..c9d6c6cb3f 100644
--- a/Marlin/src/feature/probe_temp_comp.cpp
+++ b/Marlin/src/feature/probe_temp_comp.cpp
@@ -71,7 +71,7 @@ bool ProbeTempComp::set_offset(const TempSensorID tsi, const uint8_t idx, const
 
 void ProbeTempComp::print_offsets() {
   LOOP_L_N(s, TSI_COUNT) {
-    float temp = cali_info[s].start_temp;
+    celsius_t temp = cali_info[s].start_temp;
     for (int16_t i = -1; i < cali_info[s].measurements; ++i) {
       SERIAL_ECHOPGM_P(s == TSI_BED ? PSTR("Bed") :
         #if ENABLED(USE_TEMP_EXT_COMPENSATION)
@@ -114,8 +114,8 @@ bool ProbeTempComp::finish_calibration(const TempSensorID tsi) {
   }
 
   const uint8_t measurements = cali_info[tsi].measurements;
-  const float start_temp = cali_info[tsi].start_temp,
-                res_temp = cali_info[tsi].temp_res;
+  const celsius_t start_temp = cali_info[tsi].start_temp,
+                    res_temp = cali_info[tsi].temp_res;
   int16_t * const data = sensor_z_offsets[tsi];
 
   // Extrapolate
@@ -159,19 +159,19 @@ bool ProbeTempComp::finish_calibration(const TempSensorID tsi) {
   return true;
 }
 
-void ProbeTempComp::compensate_measurement(const TempSensorID tsi, const_float_t temp, float &meas_z) {
+void ProbeTempComp::compensate_measurement(const TempSensorID tsi, const celsius_t temp, float &meas_z) {
   if (WITHIN(temp, cali_info[tsi].start_temp, cali_info[tsi].end_temp))
     meas_z -= get_offset_for_temperature(tsi, temp);
 }
 
-float ProbeTempComp::get_offset_for_temperature(const TempSensorID tsi, const_float_t temp) {
+float ProbeTempComp::get_offset_for_temperature(const TempSensorID tsi, const celsius_t temp) {
   const uint8_t measurements = cali_info[tsi].measurements;
-  const float start_temp = cali_info[tsi].start_temp,
-                res_temp = cali_info[tsi].temp_res;
+  const celsius_t start_temp = cali_info[tsi].start_temp,
+                    res_temp = cali_info[tsi].temp_res;
   const int16_t * const data = sensor_z_offsets[tsi];
 
-  auto point = [&](uint8_t i) {
-    return xy_float_t({start_temp + i*res_temp, static_cast<float>(data[i])});
+  auto point = [&](uint8_t i) -> xy_float_t {
+    return xy_float_t({ static_cast<float>(start_temp) + i * res_temp, static_cast<float>(data[i]) });
   };
 
   auto linear_interp = [](const_float_t x, xy_float_t p1, xy_float_t p2) {
@@ -207,17 +207,18 @@ bool ProbeTempComp::linear_regression(const TempSensorID tsi, float &k, float &d
 
   if (!WITHIN(calib_idx, 2, cali_info[tsi].measurements)) return false;
 
-  const float start_temp = cali_info[tsi].start_temp,
-                res_temp = cali_info[tsi].temp_res;
+  const celsius_t start_temp = cali_info[tsi].start_temp,
+                    res_temp = cali_info[tsi].temp_res;
   const int16_t * const data = sensor_z_offsets[tsi];
 
   float sum_x = start_temp,
         sum_x2 = sq(start_temp),
         sum_xy = 0, sum_y = 0;
 
+  float xi = static_cast<float>(start_temp);
   LOOP_L_N(i, calib_idx) {
-    const float xi = start_temp + (i + 1) * res_temp,
-                yi = static_cast<float>(data[i]);
+    const float yi = static_cast<float>(data[i]);
+    xi += res_temp;
     sum_x += xi;
     sum_x2 += sq(xi);
     sum_xy += xi * yi;
diff --git a/Marlin/src/feature/probe_temp_comp.h b/Marlin/src/feature/probe_temp_comp.h
index c31d287a1b..2eeb7f47ec 100644
--- a/Marlin/src/feature/probe_temp_comp.h
+++ b/Marlin/src/feature/probe_temp_comp.h
@@ -34,9 +34,9 @@ enum TempSensorID : uint8_t {
 
 typedef struct {
   uint8_t measurements; // Max. number of measurements to be stored (35 - 80°C)
-  float   temp_res,     // Resolution in °C between measurements
-          start_temp,   // Base measurement; z-offset == 0
-          end_temp;
+  celsius_t temp_res,   // Resolution in °C between measurements
+            start_temp, // Base measurement; z-offset == 0
+            end_temp;
 } temp_calib_t;
 
 /**
@@ -50,25 +50,25 @@ typedef struct {
   #define PTC_SAMPLE_COUNT 10U
 #endif
 #ifndef PTC_SAMPLE_RES
-  #define PTC_SAMPLE_RES 5.0f
+  #define PTC_SAMPLE_RES 5
 #endif
 #ifndef PTC_SAMPLE_START
-  #define PTC_SAMPLE_START 30.0f
+  #define PTC_SAMPLE_START 30
 #endif
 #define PTC_SAMPLE_END ((PTC_SAMPLE_START) + (PTC_SAMPLE_COUNT) * (PTC_SAMPLE_RES))
 
 // Bed temperature calibration constants
 #ifndef BTC_PROBE_TEMP
-  #define BTC_PROBE_TEMP 30.0f
+  #define BTC_PROBE_TEMP 30
 #endif
 #ifndef BTC_SAMPLE_COUNT
   #define BTC_SAMPLE_COUNT 10U
 #endif
 #ifndef BTC_SAMPLE_STEP
-  #define BTC_SAMPLE_RES 5.0f
+  #define BTC_SAMPLE_RES 5
 #endif
 #ifndef BTC_SAMPLE_START
-  #define BTC_SAMPLE_START 60.0f
+  #define BTC_SAMPLE_START 60
 #endif
 #define BTC_SAMPLE_END ((BTC_SAMPLE_START) + (BTC_SAMPLE_COUNT) * (BTC_SAMPLE_RES))
 
@@ -77,7 +77,7 @@ typedef struct {
 #endif
 
 #ifndef PTC_PROBE_RAISE
-  #define PTC_PROBE_RAISE 10.0f
+  #define PTC_PROBE_RAISE 10
 #endif
 
 static constexpr temp_calib_t cali_info_init[TSI_COUNT] = {
@@ -124,7 +124,7 @@ class ProbeTempComp {
     static void prepare_new_calibration(const_float_t init_meas_z);
     static void push_back_new_measurement(const TempSensorID tsi, const_float_t meas_z);
     static bool finish_calibration(const TempSensorID tsi);
-    static void compensate_measurement(const TempSensorID tsi, const_float_t temp, float &meas_z);
+    static void compensate_measurement(const TempSensorID tsi, const celsius_t temp, float &meas_z);
 
   private:
     static uint8_t calib_idx;
@@ -135,7 +135,7 @@ class ProbeTempComp {
      */
     static float init_measurement;
 
-    static float get_offset_for_temperature(const TempSensorID tsi, const_float_t temp);
+    static float get_offset_for_temperature(const TempSensorID tsi, const celsius_t temp);
 
     /**
      * Fit a linear function in measured temperature offsets
diff --git a/Marlin/src/gcode/calibrate/G76_M192_M871.cpp b/Marlin/src/gcode/calibrate/G76_M192_M871.cpp
index f07d398226..d5266179c7 100644
--- a/Marlin/src/gcode/calibrate/G76_M192_M871.cpp
+++ b/Marlin/src/gcode/calibrate/G76_M192_M871.cpp
@@ -103,9 +103,9 @@ void GcodeSuite::G76() {
     return (timeout && ELAPSED(ms, timeout));
   };
 
-  auto wait_for_temps = [&](const float tb, const float tp, millis_t &ntr, const millis_t timeout=0) {
+  auto wait_for_temps = [&](const celsius_t tb, const celsius_t tp, millis_t &ntr, const millis_t timeout=0) {
     say_waiting_for(); SERIAL_ECHOLNPGM("bed and probe temperature.");
-    while (fabs(thermalManager.degBed() - tb) > 0.1f || thermalManager.degProbe() > tp)
+    while (thermalManager.wholeDegBed() != tb || thermalManager.wholeDegProbe() > tp)
       if (report_temps(ntr, timeout)) return true;
     return false;
   };
@@ -180,7 +180,7 @@ void GcodeSuite::G76() {
             target_probe = temp_comp.bed_calib_probe_temp;
 
     say_waiting_for(); SERIAL_ECHOLNPGM(" cooling.");
-    while (thermalManager.degBed() > target_bed || thermalManager.degProbe() > target_probe)
+    while (thermalManager.wholeDegBed() > target_bed || thermalManager.wholeDegProbe() > target_probe)
       report_temps(next_temp_report);
 
     // Disable leveling so it won't mess with us
@@ -204,7 +204,7 @@ void GcodeSuite::G76() {
       do_blocking_move_to(noz_pos_xyz);
       say_waiting_for_probe_heating();
       SERIAL_EOL();
-      while (thermalManager.degProbe() < target_probe)
+      while (thermalManager.wholeDegProbe() < target_probe)
         report_temps(next_temp_report);
 
       const float measured_z = g76_probe(TSI_BED, target_bed, noz_pos_xyz);
@@ -350,7 +350,7 @@ void GcodeSuite::M192() {
     return;
   }
 
-  const float target_temp = parser.value_celsius();
+  const celsius_t target_temp = parser.value_celsius();
   ui.set_status_P(thermalManager.isProbeBelowTemp(target_temp) ? GET_TEXT(MSG_PROBE_HEATING) : GET_TEXT(MSG_PROBE_COOLING));
   thermalManager.wait_for_probe(target_temp, no_wait_for_cooling);
 }
diff --git a/Marlin/src/lcd/HD44780/marlinui_HD44780.cpp b/Marlin/src/lcd/HD44780/marlinui_HD44780.cpp
index 6ed4d33630..e91213b5b7 100644
--- a/Marlin/src/lcd/HD44780/marlinui_HD44780.cpp
+++ b/Marlin/src/lcd/HD44780/marlinui_HD44780.cpp
@@ -525,10 +525,10 @@ FORCE_INLINE void _draw_axis_value(const AxisEnum axis, const char *value, const
 FORCE_INLINE void _draw_heater_status(const heater_id_t heater_id, const char prefix, const bool blink) {
   #if HAS_HEATED_BED
     const bool isBed = TERN(HAS_HEATED_CHAMBER, heater_id == H_BED, heater_id < 0);
-    const celsius_t t1 = (isBed ? thermalManager.degBed()       : thermalManager.degHotend(heater_id)),
+    const celsius_t t1 = (isBed ? thermalManager.wholeDegBed()  : thermalManager.wholeDegHotend(heater_id)),
                     t2 = (isBed ? thermalManager.degTargetBed() : thermalManager.degTargetHotend(heater_id));
   #else
-    const celsius_t t1 = thermalManager.degHotend(heater_id), t2 = thermalManager.degTargetHotend(heater_id);
+    const celsius_t t1 = thermalManager.wholeDegHotend(heater_id), t2 = thermalManager.degTargetHotend(heater_id);
   #endif
 
   if (prefix >= 0) lcd_put_wchar(prefix);
@@ -557,11 +557,11 @@ FORCE_INLINE void _draw_heater_status(const heater_id_t heater_id, const char pr
 
 #if HAS_COOLER
 FORCE_INLINE void _draw_cooler_status(const char prefix, const bool blink) {
-  const float t1 = thermalManager.degCooler(), t2 = thermalManager.degTargetCooler();
+  const celsius_t t2 = thermalManager.degTargetCooler();
 
   if (prefix >= 0) lcd_put_wchar(prefix);
 
-  lcd_put_u8str(i16tostr3rj(t1 + 0.5));
+  lcd_put_u8str(i16tostr3rj(thermalManager.wholeDegCooler()));
   lcd_put_wchar('/');
 
   #if !HEATER_IDLE_HANDLER
@@ -574,7 +574,7 @@ FORCE_INLINE void _draw_cooler_status(const char prefix, const bool blink) {
     }
     else
   #endif
-      lcd_put_u8str(i16tostr3left(t2 + 0.5));
+      lcd_put_u8str(i16tostr3left(t2));
 
   if (prefix >= 0) {
     lcd_put_wchar(LCD_STR_DEGREE[0]);
diff --git a/Marlin/src/lcd/TFTGLCD/marlinui_TFTGLCD.cpp b/Marlin/src/lcd/TFTGLCD/marlinui_TFTGLCD.cpp
index ddc33c4923..31cdc4ac30 100644
--- a/Marlin/src/lcd/TFTGLCD/marlinui_TFTGLCD.cpp
+++ b/Marlin/src/lcd/TFTGLCD/marlinui_TFTGLCD.cpp
@@ -434,10 +434,10 @@ FORCE_INLINE void _draw_heater_status(const heater_id_t heater_id, const char *p
   uint8_t pic_hot_bits;
   #if HAS_HEATED_BED
     const bool isBed = heater_id < 0;
-    const celsius_t t1 = (isBed ? thermalManager.degBed() : thermalManager.degHotend(heater_id)),
+    const celsius_t t1 = (isBed ? thermalManager.wholeDegBed() : thermalManager.wholeDegHotend(heater_id)),
                     t2 = (isBed ? thermalManager.degTargetBed() : thermalManager.degTargetHotend(heater_id));
   #else
-    const celsius_t t1 = thermalManager.degHotend(heater_id), t2 = thermalManager.degTargetHotend(heater_id);
+    const celsius_t t1 = thermalManager.wholeDegHotend(heater_id), t2 = thermalManager.degTargetHotend(heater_id);
   #endif
 
   #if HOTENDS < 2
@@ -803,7 +803,7 @@ void MarlinUI::draw_status_screen() {
       if (!PanelDetected) return;
       lcd.setCursor((LCD_WIDTH - 14) / 2, row + 1);
       lcd.write(LCD_STR_THERMOMETER[0]); lcd_put_u8str_P(PSTR(" E")); lcd.write('1' + extruder); lcd.write(' ');
-      lcd.print(i16tostr3rj(thermalManager.degHotend(extruder)));       lcd.write(LCD_STR_DEGREE[0]); lcd.write('/');
+      lcd.print(i16tostr3rj(thermalManager.wholeDegHotend(extruder))); lcd.write(LCD_STR_DEGREE[0]); lcd.write('/');
       lcd.print(i16tostr3rj(thermalManager.degTargetHotend(extruder))); lcd.write(LCD_STR_DEGREE[0]);
       lcd.print_line();
     }
diff --git a/Marlin/src/lcd/dogm/marlinui_DOGM.cpp b/Marlin/src/lcd/dogm/marlinui_DOGM.cpp
index dc60c1bff3..f298e7be8b 100644
--- a/Marlin/src/lcd/dogm/marlinui_DOGM.cpp
+++ b/Marlin/src/lcd/dogm/marlinui_DOGM.cpp
@@ -324,7 +324,7 @@ void MarlinUI::clear_lcd() { } // Automatically cleared by Picture Loop
       lcd_put_wchar(LCD_PIXEL_WIDTH - 11 * (MENU_FONT_WIDTH), row_y2, 'E');
       lcd_put_wchar((char)('1' + extruder));
       lcd_put_wchar(' ');
-      lcd_put_u8str(i16tostr3rj(thermalManager.degHotend(extruder)));
+      lcd_put_u8str(i16tostr3rj(thermalManager.wholeDegHotend(extruder)));
       lcd_put_wchar('/');
 
       if (get_blink() || !thermalManager.heater_idle[extruder].timed_out)
diff --git a/Marlin/src/lcd/dogm/status_screen_DOGM.cpp b/Marlin/src/lcd/dogm/status_screen_DOGM.cpp
index e2bffb7fe0..81e89f7cf5 100644
--- a/Marlin/src/lcd/dogm/status_screen_DOGM.cpp
+++ b/Marlin/src/lcd/dogm/status_screen_DOGM.cpp
@@ -213,7 +213,7 @@ FORCE_INLINE void _draw_centered_temp(const celsius_t temp, const uint8_t tx, co
 
     const uint8_t tx = STATUS_HOTEND_TEXT_X(heater_id);
 
-    const celsius_t temp = thermalManager.degHotend(heater_id),
+    const celsius_t temp = thermalManager.wholeDegHotend(heater_id),
                   target = thermalManager.degTargetHotend(heater_id);
 
     #if DISABLED(STATUS_HOTEND_ANIM)
@@ -310,7 +310,7 @@ FORCE_INLINE void _draw_centered_temp(const celsius_t temp, const uint8_t tx, co
 
     const uint8_t tx = STATUS_BED_TEXT_X;
 
-    const celsius_t temp = thermalManager.degBed(),
+    const celsius_t temp = thermalManager.wholeDegBed(),
                   target = thermalManager.degTargetBed();
 
     #if ENABLED(STATUS_HEAT_PERCENT) || DISABLED(STATUS_BED_ANIM)
@@ -380,14 +380,14 @@ FORCE_INLINE void _draw_centered_temp(const celsius_t temp, const uint8_t tx, co
         _draw_centered_temp(thermalManager.degTargetChamber(), STATUS_CHAMBER_TEXT_X, 7);
     #endif
     if (PAGE_CONTAINS(28 - INFO_FONT_ASCENT, 28 - 1))
-      _draw_centered_temp(thermalManager.degChamber(), STATUS_CHAMBER_TEXT_X, 28);
+      _draw_centered_temp(thermalManager.wholeDegChamber(), STATUS_CHAMBER_TEXT_X, 28);
   }
 #endif
 
 #if DO_DRAW_COOLER
   FORCE_INLINE void _draw_cooler_status() {
     if (PAGE_CONTAINS(28 - INFO_FONT_ASCENT, 28 - 1))
-      _draw_centered_temp(thermalManager.degCooler(), STATUS_COOLER_TEXT_X, 28);
+      _draw_centered_temp(thermalManager.wholeDegCooler(), STATUS_COOLER_TEXT_X, 28);
   }
 #endif
 
diff --git a/Marlin/src/lcd/dogm/status_screen_lite_ST7920.cpp b/Marlin/src/lcd/dogm/status_screen_lite_ST7920.cpp
index b8257d32ff..2f8b5f67e2 100644
--- a/Marlin/src/lcd/dogm/status_screen_lite_ST7920.cpp
+++ b/Marlin/src/lcd/dogm/status_screen_lite_ST7920.cpp
@@ -721,14 +721,14 @@ void ST7920_Lite_Status_Screen::update_indicators(const bool forceUpdate) {
     const duration_t elapsed            = print_job_timer.duration();
     duration_t       remaining          = TERN0(USE_M73_REMAINING_TIME, ui.get_remaining_time());
     const uint16_t   feedrate_perc      = feedrate_percentage;
-    const celsius_t  extruder_1_temp    = thermalManager.degHotend(0),
+    const celsius_t  extruder_1_temp    = thermalManager.wholeDegHotend(0),
                      extruder_1_target  = thermalManager.degTargetHotend(0);
     #if HAS_MULTI_HOTEND
-      const celsius_t extruder_2_temp   = thermalManager.degHotend(1),
+      const celsius_t extruder_2_temp   = thermalManager.wholeDegHotend(1),
                       extruder_2_target = thermalManager.degTargetHotend(1);
     #endif
     #if HAS_HEATED_BED
-      const celsius_t bed_temp          = thermalManager.degBed(),
+      const celsius_t bed_temp          = thermalManager.wholeDegBed(),
                       bed_target        = thermalManager.degTargetBed();
     #endif
 
diff --git a/Marlin/src/lcd/dwin/e3v2/dwin.cpp b/Marlin/src/lcd/dwin/e3v2/dwin.cpp
index b86e7cbe60..cb7fb2728e 100644
--- a/Marlin/src/lcd/dwin/e3v2/dwin.cpp
+++ b/Marlin/src/lcd/dwin/e3v2/dwin.cpp
@@ -1583,7 +1583,7 @@ void _draw_xyz_position(const bool force) {
 void update_variable() {
   #if HAS_HOTEND
     static celsius_t _hotendtemp = 0, _hotendtarget = 0;
-    const celsius_t hc = thermalManager.degHotend(0),
+    const celsius_t hc = thermalManager.wholeDegHotend(0),
                     ht = thermalManager.degTargetHotend(0);
     const bool _new_hotend_temp = _hotendtemp != hc,
                _new_hotend_target = _hotendtarget != ht;
@@ -1592,7 +1592,7 @@ void update_variable() {
   #endif
   #if HAS_HEATED_BED
     static celsius_t _bedtemp = 0, _bedtarget = 0;
-    const celsius_t bc = thermalManager.degBed(),
+    const celsius_t bc = thermalManager.wholeDegBed(),
                     bt = thermalManager.degTargetBed();
     const bool _new_bed_temp = _bedtemp != bc,
                _new_bed_target = _bedtarget != bt;
@@ -1880,7 +1880,7 @@ void Draw_Status_Area(const bool with_update) {
 
   #if HAS_HOTEND
     DWIN_ICON_Show(ICON, ICON_HotendTemp, 10, 383);
-    DWIN_Draw_IntValue(true, true, 0, DWIN_FONT_STAT, Color_White, Color_Bg_Black, 3, 28, 384, thermalManager.degHotend(0));
+    DWIN_Draw_IntValue(true, true, 0, DWIN_FONT_STAT, Color_White, Color_Bg_Black, 3, 28, 384, thermalManager.wholeDegHotend(0));
     DWIN_Draw_String(false, false, DWIN_FONT_STAT, Color_White, Color_Bg_Black, 25 + 3 * STAT_CHR_W + 5, 384, F("/"));
     DWIN_Draw_IntValue(true, true, 0, DWIN_FONT_STAT, Color_White, Color_Bg_Black, 3, 25 + 4 * STAT_CHR_W + 6, 384, thermalManager.degTargetHotend(0));
 
@@ -1891,7 +1891,7 @@ void Draw_Status_Area(const bool with_update) {
 
   #if HAS_HEATED_BED
     DWIN_ICON_Show(ICON, ICON_BedTemp, 10, 416);
-    DWIN_Draw_IntValue(true, true, 0, DWIN_FONT_STAT, Color_White, Color_Bg_Black, 3, 28, 417, thermalManager.degBed());
+    DWIN_Draw_IntValue(true, true, 0, DWIN_FONT_STAT, Color_White, Color_Bg_Black, 3, 28, 417, thermalManager.wholeDegBed());
     DWIN_Draw_String(false, false, DWIN_FONT_STAT, Color_White, Color_Bg_Black, 25 + 3 * STAT_CHR_W + 5, 417, F("/"));
     DWIN_Draw_IntValue(true, true, 0, DWIN_FONT_STAT, Color_White, Color_Bg_Black, 3, 25 + 4 * STAT_CHR_W + 6, 417, thermalManager.degTargetBed());
   #endif
@@ -2709,7 +2709,7 @@ void HMI_AxisMove() {
           case 4: // Extruder
             // window tips
             #ifdef PREVENT_COLD_EXTRUSION
-              if (thermalManager.degHotend(0) < EXTRUDE_MINTEMP) {
+              if (thermalManager.wholeDegHotend(0) < (EXTRUDE_MINTEMP)) {
                 HMI_flag.ETempTooLow_flag = true;
                 Popup_Window_ETempTooLow();
                 DWIN_UpdateLCD();
diff --git a/Marlin/src/lcd/extui/lib/mks_ui/draw_dialog.cpp b/Marlin/src/lcd/extui/lib/mks_ui/draw_dialog.cpp
index c4056f392a..b4ebc97db3 100644
--- a/Marlin/src/lcd/extui/lib/mks_ui/draw_dialog.cpp
+++ b/Marlin/src/lcd/extui/lib/mks_ui/draw_dialog.cpp
@@ -486,7 +486,7 @@ void lv_draw_dialog(uint8_t type) {
 
 void filament_sprayer_temp() {
   char buf[20] = {0};
-  sprintf(buf, preheat_menu.value_state, thermalManager.degHotend(uiCfg.extruderIndex), thermalManager.degTargetHotend(uiCfg.extruderIndex));
+  sprintf(buf, preheat_menu.value_state, thermalManager.wholeDegHotend(uiCfg.extruderIndex), thermalManager.degTargetHotend(uiCfg.extruderIndex));
 
   strcpy(public_buf_l, uiCfg.extruderIndex < 1 ? extrude_menu.ext1 : extrude_menu.ext2);
   strcat_P(public_buf_l, PSTR(": "));
@@ -522,7 +522,7 @@ void filament_dialog_handle() {
   }
 
   if (uiCfg.filament_load_heat_flg) {
-    const celsius_t diff = thermalManager.degHotend(uiCfg.extruderIndex) - gCfgItems.filament_limit_temp;
+    const celsius_t diff = thermalManager.wholeDegHotend(uiCfg.extruderIndex) - gCfgItems.filament_limit_temp;
     if (abs(diff) < 2 || diff > 0) {
       uiCfg.filament_load_heat_flg = false;
       lv_clear_dialog();
@@ -538,7 +538,7 @@ void filament_dialog_handle() {
   }
 
   if (uiCfg.filament_unload_heat_flg) {
-    const celsius_t diff = thermalManager.degHotend(uiCfg.extruderIndex) - gCfgItems.filament_limit_temp;
+    const celsius_t diff = thermalManager.wholeDegHotend(uiCfg.extruderIndex) - gCfgItems.filament_limit_temp;
     if (abs(diff) < 2 || diff > 0) {
       uiCfg.filament_unload_heat_flg = false;
       lv_clear_dialog();
diff --git a/Marlin/src/lcd/extui/lib/mks_ui/draw_extrusion.cpp b/Marlin/src/lcd/extui/lib/mks_ui/draw_extrusion.cpp
index 43ed214199..77ec61c4b7 100644
--- a/Marlin/src/lcd/extui/lib/mks_ui/draw_extrusion.cpp
+++ b/Marlin/src/lcd/extui/lib/mks_ui/draw_extrusion.cpp
@@ -195,7 +195,7 @@ void disp_ext_speed() {
 
 void disp_hotend_temp() {
   char buf[20] = {0};
-  sprintf(buf, extrude_menu.temp_value, (int)thermalManager.degHotend(uiCfg.extruderIndex), (int)thermalManager.degTargetHotend(uiCfg.extruderIndex));
+  sprintf(buf, extrude_menu.temp_value, thermalManager.wholeDegHotend(uiCfg.extruderIndex), thermalManager.degTargetHotend(uiCfg.extruderIndex));
   strcpy(public_buf_l, extrude_menu.temper_text);
   strcat(public_buf_l, buf);
   lv_label_set_text(tempText, public_buf_l);
diff --git a/Marlin/src/lcd/extui/lib/mks_ui/draw_filament_change.cpp b/Marlin/src/lcd/extui/lib/mks_ui/draw_filament_change.cpp
index a3313285df..e3cfde3011 100644
--- a/Marlin/src/lcd/extui/lib/mks_ui/draw_filament_change.cpp
+++ b/Marlin/src/lcd/extui/lib/mks_ui/draw_filament_change.cpp
@@ -50,8 +50,8 @@ static void event_handler(lv_obj_t *obj, lv_event_t event) {
   switch (obj->mks_obj_id) {
     case ID_FILAMNT_IN:
       uiCfg.filament_load_heat_flg = true;
-      if (abs(thermalManager.degTargetHotend(uiCfg.extruderIndex) - thermalManager.degHotend(uiCfg.extruderIndex)) <= 1
-          || gCfgItems.filament_limit_temp <= thermalManager.degHotend(uiCfg.extruderIndex)) {
+      if (abs(thermalManager.degTargetHotend(uiCfg.extruderIndex) - thermalManager.wholeDegHotend(uiCfg.extruderIndex)) <= 1
+          || gCfgItems.filament_limit_temp <= thermalManager.wholeDegHotend(uiCfg.extruderIndex)) {
         lv_clear_filament_change();
         lv_draw_dialog(DIALOG_TYPE_FILAMENT_HEAT_LOAD_COMPLETED);
       }
@@ -67,8 +67,8 @@ static void event_handler(lv_obj_t *obj, lv_event_t event) {
     case ID_FILAMNT_OUT:
       uiCfg.filament_unload_heat_flg = true;
       if (thermalManager.degTargetHotend(uiCfg.extruderIndex)
-          && (abs((int)(thermalManager.degTargetHotend(uiCfg.extruderIndex) - thermalManager.degHotend(uiCfg.extruderIndex))) <= 1
-              || thermalManager.degHotend(uiCfg.extruderIndex) >= gCfgItems.filament_limit_temp)
+          && (abs(thermalManager.degTargetHotend(uiCfg.extruderIndex) - thermalManager.wholeDegHotend(uiCfg.extruderIndex)) <= 1
+              || thermalManager.wholeDegHotend(uiCfg.extruderIndex) >= gCfgItems.filament_limit_temp)
       ) {
         lv_clear_filament_change();
         lv_draw_dialog(DIALOG_TYPE_FILAMENT_HEAT_UNLOAD_COMPLETED);
@@ -154,7 +154,7 @@ void disp_filament_temp() {
   public_buf_l[0] = '\0';
 
   strcat(public_buf_l, uiCfg.extruderIndex < 1 ? preheat_menu.ext1 : preheat_menu.ext2);
-  sprintf(buf, preheat_menu.value_state, (int)thermalManager.degHotend(uiCfg.extruderIndex), (int)thermalManager.degTargetHotend(uiCfg.extruderIndex));
+  sprintf(buf, preheat_menu.value_state, thermalManager.wholeDegHotend(uiCfg.extruderIndex), thermalManager.degTargetHotend(uiCfg.extruderIndex));
 
   strcat_P(public_buf_l, PSTR(": "));
   strcat(public_buf_l, buf);
diff --git a/Marlin/src/lcd/extui/lib/mks_ui/draw_preHeat.cpp b/Marlin/src/lcd/extui/lib/mks_ui/draw_preHeat.cpp
index 0395ccde52..5fcfec1534 100644
--- a/Marlin/src/lcd/extui/lib/mks_ui/draw_preHeat.cpp
+++ b/Marlin/src/lcd/extui/lib/mks_ui/draw_preHeat.cpp
@@ -216,12 +216,12 @@ void disp_desire_temp() {
 
   if (uiCfg.curTempType == 0) {
     strcat(public_buf_l, uiCfg.extruderIndex < 1 ? preheat_menu.ext1 : preheat_menu.ext2);
-    sprintf(buf, preheat_menu.value_state, (int)thermalManager.degHotend(uiCfg.extruderIndex), (int)thermalManager.degTargetHotend(uiCfg.extruderIndex));
+    sprintf(buf, preheat_menu.value_state, thermalManager.wholeDegHotend(uiCfg.extruderIndex), thermalManager.degTargetHotend(uiCfg.extruderIndex));
   }
   else {
     #if HAS_HEATED_BED
       strcat(public_buf_l, preheat_menu.hotbed);
-      sprintf(buf, preheat_menu.value_state, (int)thermalManager.degBed(), (int)thermalManager.degTargetBed());
+      sprintf(buf, preheat_menu.value_state, thermalManager.wholeDegBed(), thermalManager.degTargetBed());
     #endif
   }
   strcat_P(public_buf_l, PSTR(": "));
diff --git a/Marlin/src/lcd/extui/lib/mks_ui/draw_printing.cpp b/Marlin/src/lcd/extui/lib/mks_ui/draw_printing.cpp
index e35027a654..f752d605ed 100644
--- a/Marlin/src/lcd/extui/lib/mks_ui/draw_printing.cpp
+++ b/Marlin/src/lcd/extui/lib/mks_ui/draw_printing.cpp
@@ -219,18 +219,18 @@ void lv_draw_printing() {
 }
 
 void disp_ext_temp() {
-  sprintf(public_buf_l, printing_menu.temp1, (int)thermalManager.degHotend(0), (int)thermalManager.degTargetHotend(0));
+  sprintf(public_buf_l, printing_menu.temp1, thermalManager.wholeDegHotend(0), thermalManager.degTargetHotend(0));
   lv_label_set_text(labelExt1, public_buf_l);
 
   #if HAS_MULTI_EXTRUDER
-    sprintf(public_buf_l, printing_menu.temp1, (int)thermalManager.degHotend(1), (int)thermalManager.degTargetHotend(1));
+    sprintf(public_buf_l, printing_menu.temp1, thermalManager.wholeDegHotend(1), thermalManager.degTargetHotend(1));
     lv_label_set_text(labelExt2, public_buf_l);
   #endif
 }
 
 void disp_bed_temp() {
   #if HAS_HEATED_BED
-    sprintf(public_buf_l, printing_menu.bed_temp, (int)thermalManager.degBed(), (int)thermalManager.degTargetBed());
+    sprintf(public_buf_l, printing_menu.bed_temp, thermalManager.wholeDegBed(), thermalManager.degTargetBed());
     lv_label_set_text(labelBed, public_buf_l);
   #endif
 }
diff --git a/Marlin/src/lcd/extui/lib/mks_ui/draw_ready_print.cpp b/Marlin/src/lcd/extui/lib/mks_ui/draw_ready_print.cpp
index 8340e2ae87..26cd55d7f5 100644
--- a/Marlin/src/lcd/extui/lib/mks_ui/draw_ready_print.cpp
+++ b/Marlin/src/lcd/extui/lib/mks_ui/draw_ready_print.cpp
@@ -104,14 +104,14 @@ void disp_det_error() {
 lv_obj_t *e1, *e2, *e3, *bed;
 void mks_disp_test() {
   char buf[30] = {0};
-  sprintf_P(buf, PSTR("e1:%d"), (int)thermalManager.degHotend(0));
+  sprintf_P(buf, PSTR("e1:%d"), thermalManager.wholeDegHotend(0));
   lv_label_set_text(e1, buf);
   #if HAS_MULTI_HOTEND
-    sprintf_P(buf, PSTR("e2:%d"), (int)thermalManager.degHotend(1));
+    sprintf_P(buf, PSTR("e2:%d"), thermalManager.wholeDegHotend(1));
     lv_label_set_text(e2, buf);
   #endif
   #if HAS_HEATED_BED
-    sprintf_P(buf, PSTR("bed:%d"), (int)thermalManager.degBed());
+    sprintf_P(buf, PSTR("bed:%d"), thermalManager.wholeDegBed());
     lv_label_set_text(bed, buf);
   #endif
 }
@@ -138,20 +138,20 @@ void lv_draw_ready_print() {
 
     e1 = lv_label_create_empty(scr);
     lv_obj_set_pos(e1, 20, 20);
-    sprintf_P(buf, PSTR("e1:  %d"), (int)thermalManager.degHotend(0));
+    sprintf_P(buf, PSTR("e1:  %d"), thermalManager.wholeDegHotend(0));
     lv_label_set_text(e1, buf);
 
     #if HAS_MULTI_HOTEND
       e2 = lv_label_create_empty(scr);
       lv_obj_set_pos(e2, 20, 45);
-      sprintf_P(buf, PSTR("e1:  %d"), (int)thermalManager.degHotend(1));
+      sprintf_P(buf, PSTR("e1:  %d"), thermalManager.wholeDegHotend(1));
       lv_label_set_text(e2, buf);
     #endif
 
     #if HAS_HEATED_BED
       bed = lv_label_create_empty(scr);
       lv_obj_set_pos(bed, 20, 95);
-      sprintf_P(buf, PSTR("bed:  %d"), (int)thermalManager.degBed());
+      sprintf_P(buf, PSTR("bed:  %d"), thermalManager.wholeDegBed());
       lv_label_set_text(bed, buf);
     #endif
 
@@ -219,7 +219,7 @@ void lv_draw_ready_print() {
     itoa(thermalManager.degHotend(0), buf, 10);
     lv_label_set_text(labelExt1, buf);
     lv_obj_align(labelExt1, buttonExt1, LV_ALIGN_CENTER, 0, LABEL_MOD_Y);
-    sprintf_P(buf, PSTR("-> %d"), (int)thermalManager.degTargetHotend(0));
+    sprintf_P(buf, PSTR("-> %d"), thermalManager.degTargetHotend(0));
     lv_label_set_text(labelExt1Target, buf);
     lv_obj_align(labelExt1Target, buttonExt1, LV_ALIGN_CENTER, 0, TARGET_LABEL_MOD_Y);
 
@@ -227,7 +227,7 @@ void lv_draw_ready_print() {
       itoa(thermalManager.degHotend(1), buf, 10);
       lv_label_set_text(labelExt2, buf);
       lv_obj_align(labelExt2, buttonExt2, LV_ALIGN_CENTER, 0, LABEL_MOD_Y);
-      sprintf_P(buf, PSTR("-> %d"), (int)thermalManager.degTargetHotend(1));
+      sprintf_P(buf, PSTR("-> %d"), thermalManager.degTargetHotend(1));
       lv_label_set_text(labelExt2Target, buf);
       lv_obj_align(labelExt2Target, buttonExt2, LV_ALIGN_CENTER, 0, TARGET_LABEL_MOD_Y);
     #endif
@@ -236,7 +236,7 @@ void lv_draw_ready_print() {
       itoa(thermalManager.degBed(), buf, 10);
       lv_label_set_text(labelBed, buf);
       lv_obj_align(labelBed, buttonBedstate, LV_ALIGN_CENTER, 0, LABEL_MOD_Y);
-      sprintf_P(buf, PSTR("-> %d"), (int)thermalManager.degTargetBed());
+      sprintf_P(buf, PSTR("-> %d"), thermalManager.degTargetBed());
       lv_label_set_text(labelBedTarget, buf);
       lv_obj_align(labelBedTarget, buttonBedstate, LV_ALIGN_CENTER, 0, TARGET_LABEL_MOD_Y);
     #endif
@@ -257,15 +257,15 @@ void lv_draw_ready_print() {
 
 void lv_temp_refr() {
   #if HAS_HEATED_BED
-    sprintf(public_buf_l, printing_menu.bed_temp, (int)thermalManager.degBed(), (int)thermalManager.degTargetBed());
+    sprintf(public_buf_l, printing_menu.bed_temp, thermalManager.wholeDegBed(), thermalManager.degTargetBed());
     lv_label_set_text(labelBed, public_buf_l);
   #endif
 
-  sprintf(public_buf_l, printing_menu.temp1, (int)thermalManager.degHotend(0), (int)thermalManager.degTargetHotend(0));
+  sprintf(public_buf_l, printing_menu.temp1, thermalManager.wholeDegHotend(0), thermalManager.degTargetHotend(0));
   lv_label_set_text(labelExt1, public_buf_l);
 
   #if HAS_MULTI_EXTRUDER
-    sprintf(public_buf_l, printing_menu.temp1, (int)thermalManager.degHotend(1), (int)thermalManager.degTargetHotend(1));
+    sprintf(public_buf_l, printing_menu.temp1, thermalManager.wholeDegHotend(1), thermalManager.degTargetHotend(1));
     lv_label_set_text(labelExt2, public_buf_l);
   #endif
 }
diff --git a/Marlin/src/lcd/extui/lib/mks_ui/wifi_module.cpp b/Marlin/src/lcd/extui/lib/mks_ui/wifi_module.cpp
index 1162f7a228..4dd092e64b 100644
--- a/Marlin/src/lcd/extui/lib/mks_ui/wifi_module.cpp
+++ b/Marlin/src/lcd/extui/lib/mks_ui/wifi_module.cpp
@@ -885,7 +885,7 @@ static void wifi_gcode_exec(uint8_t *cmd_line) {
             char *outBuf = (char *)tempBuf;
             char tbuf[34];
 
-            sprintf_P(tbuf, PSTR("%d /%d"), (int)thermalManager.degHotend(0), (int)thermalManager.degTargetHotend(0));
+            sprintf_P(tbuf, PSTR("%d /%d"), thermalManager.wholeDegHotend(0), thermalManager.degTargetHotend(0));
 
             const int tlen = strlen(tbuf);
 
@@ -895,7 +895,7 @@ static void wifi_gcode_exec(uint8_t *cmd_line) {
             strcpy_P(outBuf, PSTR(" B:"));
             outBuf += 3;
             #if HAS_HEATED_BED
-              sprintf_P(outBuf, PSTR("%d /%d"), (int)thermalManager.degBed(), (int)thermalManager.degTargetBed());
+              sprintf_P(outBuf, PSTR("%d /%d"), thermalManager.wholeDegBed(), thermalManager.degTargetBed());
             #else
               strcpy_P(outBuf, PSTR("0 /0"));
             #endif
@@ -908,7 +908,7 @@ static void wifi_gcode_exec(uint8_t *cmd_line) {
             strcat_P(outBuf, PSTR(" T1:"));
             outBuf += 4;
             #if HAS_MULTI_HOTEND
-              sprintf_P(outBuf, PSTR("%d /%d"), (int)thermalManager.degHotend(1), (int)thermalManager.degTargetHotend(1));
+              sprintf_P(outBuf, PSTR("%d /%d"), thermalManager.wholeDegHotend(1), thermalManager.degTargetHotend(1));
             #else
               strcat_P(outBuf, PSTR("0 /0"));
             #endif
@@ -918,15 +918,15 @@ static void wifi_gcode_exec(uint8_t *cmd_line) {
           }
           else {
             sprintf_P((char *)tempBuf, PSTR("T:%d /%d B:%d /%d T0:%d /%d T1:%d /%d @:0 B@:0\r\n"),
-              thermalManager.degHotend(0), thermalManager.degTargetHotend(0),
+              thermalManager.wholeDegHotend(0), thermalManager.degTargetHotend(0),
               #if HAS_HEATED_BED
-                thermalManager.degBed(), thermalManager.degTargetBed(),
+                thermalManager.wholeDegBed(), thermalManager.degTargetBed(),
               #else
                 0, 0,
               #endif
-              thermalManager.degHotend(0), thermalManager.degTargetHotend(0),
+              thermalManager.wholeDegHotend(0), thermalManager.degTargetHotend(0),
               #if HAS_MULTI_HOTEND
-                thermalManager.degHotend(1), thermalManager.degTargetHotend(1)
+                thermalManager.wholeDegHotend(1), thermalManager.degTargetHotend(1)
               #else
                 0, 0
               #endif
diff --git a/Marlin/src/lcd/extui/malyan_lcd.cpp b/Marlin/src/lcd/extui/malyan_lcd.cpp
index b6a8923a39..c82ea76457 100644
--- a/Marlin/src/lcd/extui/malyan_lcd.cpp
+++ b/Marlin/src/lcd/extui/malyan_lcd.cpp
@@ -172,9 +172,9 @@ void process_lcd_eb_command(const char *command) {
 
       sprintf_P(message_buffer,
         PSTR("{T0:%03i/%03i}{T1:000/000}{TP:%03i/%03i}{TQ:%03i}{TT:%s}"),
-        int(thermalManager.degHotend(0)), thermalManager.degTargetHotend(0),
+        thermalManager.wholeDegHotend(0), thermalManager.degTargetHotend(0),
         #if HAS_HEATED_BED
-          int(thermalManager.degBed()), thermalManager.degTargetBed(),
+          thermalManager.wholeDegBed(), thermalManager.degTargetBed(),
         #else
           0, 0,
         #endif
@@ -303,9 +303,9 @@ void process_lcd_s_command(const char *command) {
       // temperature information
       char message_buffer[MAX_CURLY_COMMAND];
       sprintf_P(message_buffer, PSTR("{T0:%03i/%03i}{T1:000/000}{TP:%03i/%03i}"),
-        int(thermalManager.degHotend(0)), thermalManager.degTargetHotend(0),
+        thermalManager.wholeDegHotend(0), thermalManager.degTargetHotend(0),
         #if HAS_HEATED_BED
-          int(thermalManager.degBed()), thermalManager.degTargetBed()
+          thermalManager.wholeDegBed(), thermalManager.degTargetBed()
         #else
           0, 0
         #endif
diff --git a/Marlin/src/lcd/extui/ui_api.cpp b/Marlin/src/lcd/extui/ui_api.cpp
index 23cf26a8ca..accca50d1e 100644
--- a/Marlin/src/lcd/extui/ui_api.cpp
+++ b/Marlin/src/lcd/extui/ui_api.cpp
@@ -918,7 +918,7 @@ namespace ExtUI {
       thermalManager.updatePID();
     }
 
-    void startPIDTune(const_float_t temp, extruder_t tool) {
+    void startPIDTune(const celsius_t temp, extruder_t tool) {
       thermalManager.PID_autotune(temp, (heater_id_t)tool, 8, true);
     }
   #endif
@@ -935,7 +935,7 @@ namespace ExtUI {
       thermalManager.updatePID();
     }
 
-    void startBedPIDTune(const_float_t temp) {
+    void startBedPIDTune(const celsius_t temp) {
       thermalManager.PID_autotune(temp, H_BED, 4, true);
     }
   #endif
diff --git a/Marlin/src/lcd/tft/ui_1024x600.cpp b/Marlin/src/lcd/tft/ui_1024x600.cpp
index e04d589858..7a093ea65d 100644
--- a/Marlin/src/lcd/tft/ui_1024x600.cpp
+++ b/Marlin/src/lcd/tft/ui_1024x600.cpp
@@ -117,18 +117,18 @@ void draw_heater_status(uint16_t x, uint16_t y, const int8_t Heater) {
   celsius_t currentTemperature, targetTemperature;
 
   if (Heater >= 0) { // HotEnd
-    currentTemperature = thermalManager.degHotend(Heater);
+    currentTemperature = thermalManager.wholeDegHotend(Heater);
     targetTemperature = thermalManager.degTargetHotend(Heater);
   }
   #if HAS_HEATED_BED
     else if (Heater == H_BED) {
-      currentTemperature = thermalManager.degBed();
+      currentTemperature = thermalManager.wholeDegBed();
       targetTemperature = thermalManager.degTargetBed();
     }
   #endif
   #if HAS_TEMP_CHAMBER
     else if (Heater == H_CHAMBER) {
-      currentTemperature = thermalManager.degChamber();
+      currentTemperature = thermalManager.wholeDegChamber();
       #if HAS_HEATED_CHAMBER
         targetTemperature = thermalManager.degTargetChamber();
       #else
@@ -138,7 +138,7 @@ void draw_heater_status(uint16_t x, uint16_t y, const int8_t Heater) {
   #endif
   #if HAS_TEMP_COOLER
     else if (Heater == H_COOLER) {
-      currentTemperature = thermalManager.degCooler();
+      currentTemperature = thermalManager.wholeDegCooler();
       targetTemperature = TERN(HAS_COOLER, thermalManager.degTargetCooler(), ABSOLUTE_ZERO);
     }
   #endif
@@ -451,7 +451,7 @@ void MenuItem_confirm::draw_select_screen(PGM_P const yes, PGM_P const no, const
     tft_string.add('E');
     tft_string.add((char)('1' + extruder));
     tft_string.add(' ');
-    tft_string.add(i16tostr3rj(thermalManager.degHotend(extruder)));
+    tft_string.add(i16tostr3rj(thermalManager.wholeDegHotend(extruder)));
     tft_string.add(LCD_STR_DEGREE);
     tft_string.add(" / ");
     tft_string.add(i16tostr3rj(thermalManager.degTargetHotend(extruder)));
diff --git a/Marlin/src/lcd/tft/ui_320x240.cpp b/Marlin/src/lcd/tft/ui_320x240.cpp
index 5563d3069b..68457baa1c 100644
--- a/Marlin/src/lcd/tft/ui_320x240.cpp
+++ b/Marlin/src/lcd/tft/ui_320x240.cpp
@@ -117,18 +117,18 @@ void draw_heater_status(uint16_t x, uint16_t y, const int8_t Heater) {
   celsius_t currentTemperature, targetTemperature;
 
   if (Heater >= 0) { // HotEnd
-    currentTemperature = thermalManager.degHotend(Heater);
+    currentTemperature = thermalManager.wholeDegHotend(Heater);
     targetTemperature = thermalManager.degTargetHotend(Heater);
   }
   #if HAS_HEATED_BED
     else if (Heater == H_BED) {
-      currentTemperature = thermalManager.degBed();
+      currentTemperature = thermalManager.wholeDegBed();
       targetTemperature = thermalManager.degTargetBed();
     }
   #endif
   #if HAS_TEMP_CHAMBER
     else if (Heater == H_CHAMBER) {
-      currentTemperature = thermalManager.degChamber();
+      currentTemperature = thermalManager.wholeDegChamber();
       #if HAS_HEATED_CHAMBER
         targetTemperature = thermalManager.degTargetChamber();
       #else
@@ -138,7 +138,7 @@ void draw_heater_status(uint16_t x, uint16_t y, const int8_t Heater) {
   #endif
   #if HAS_TEMP_COOLER
     else if (Heater == H_COOLER) {
-      currentTemperature = thermalManager.degCooler();
+      currentTemperature = thermalManager.wholeDegCooler();
       targetTemperature = TERN(HAS_COOLER, thermalManager.degTargetCooler(), ABSOLUTE_ZERO);
     }
   #endif
@@ -438,7 +438,7 @@ void MenuItem_confirm::draw_select_screen(PGM_P const yes, PGM_P const no, const
     tft_string.add('E');
     tft_string.add((char)('1' + extruder));
     tft_string.add(' ');
-    tft_string.add(i16tostr3rj(thermalManager.degHotend(extruder)));
+    tft_string.add(i16tostr3rj(thermalManager.wholeDegHotend(extruder)));
     tft_string.add(LCD_STR_DEGREE);
     tft_string.add(" / ");
     tft_string.add(i16tostr3rj(thermalManager.degTargetHotend(extruder)));
diff --git a/Marlin/src/lcd/tft/ui_480x320.cpp b/Marlin/src/lcd/tft/ui_480x320.cpp
index 4d5a0b4fda..3150aff058 100644
--- a/Marlin/src/lcd/tft/ui_480x320.cpp
+++ b/Marlin/src/lcd/tft/ui_480x320.cpp
@@ -117,18 +117,18 @@ void draw_heater_status(uint16_t x, uint16_t y, const int8_t Heater) {
   celsius_t currentTemperature, targetTemperature;
 
   if (Heater >= 0) { // HotEnd
-    currentTemperature = thermalManager.degHotend(Heater);
+    currentTemperature = thermalManager.wholeDegHotend(Heater);
     targetTemperature = thermalManager.degTargetHotend(Heater);
   }
   #if HAS_HEATED_BED
     else if (Heater == H_BED) {
-      currentTemperature = thermalManager.degBed();
+      currentTemperature = thermalManager.wholeDegBed();
       targetTemperature = thermalManager.degTargetBed();
     }
   #endif
   #if HAS_TEMP_CHAMBER
     else if (Heater == H_CHAMBER) {
-      currentTemperature = thermalManager.degChamber();
+      currentTemperature = thermalManager.wholeDegChamber();
       #if HAS_HEATED_CHAMBER
         targetTemperature = thermalManager.degTargetChamber();
       #else
@@ -138,7 +138,7 @@ void draw_heater_status(uint16_t x, uint16_t y, const int8_t Heater) {
   #endif
   #if HAS_TEMP_COOLER
     else if (Heater == H_COOLER) {
-      currentTemperature = thermalManager.degCooler();
+      currentTemperature = thermalManager.wholeDegCooler();
       targetTemperature = TERN(HAS_COOLER, thermalManager.degTargetCooler(), ABSOLUTE_ZERO);
     }
   #endif
@@ -438,7 +438,7 @@ void MenuItem_confirm::draw_select_screen(PGM_P const yes, PGM_P const no, const
     tft_string.add('E');
     tft_string.add((char)('1' + extruder));
     tft_string.add(' ');
-    tft_string.add(i16tostr3rj(thermalManager.degHotend(extruder)));
+    tft_string.add(i16tostr3rj(thermalManager.wholeDegHotend(extruder)));
     tft_string.add(LCD_STR_DEGREE);
     tft_string.add(" / ");
     tft_string.add(i16tostr3rj(thermalManager.degTargetHotend(extruder)));
diff --git a/Marlin/src/module/probe.cpp b/Marlin/src/module/probe.cpp
index 910db87f55..be991c1d52 100644
--- a/Marlin/src/module/probe.cpp
+++ b/Marlin/src/module/probe.cpp
@@ -383,8 +383,8 @@ FORCE_INLINE void probe_specific_action(const bool deploy) {
 
     DEBUG_EOL();
 
-    TERN_(WAIT_FOR_NOZZLE_HEAT, if (hotend_temp > thermalManager.degHotend(0) + (TEMP_WINDOW)) thermalManager.wait_for_hotend(0));
-    TERN_(WAIT_FOR_BED_HEAT,    if (bed_temp > thermalManager.degBed() + (TEMP_BED_WINDOW))    thermalManager.wait_for_bed_heating());
+    TERN_(WAIT_FOR_NOZZLE_HEAT, if (hotend_temp > thermalManager.wholeDegHotend(0) + (TEMP_WINDOW)) thermalManager.wait_for_hotend(0));
+    TERN_(WAIT_FOR_BED_HEAT,    if (bed_temp > thermalManager.wholeDegBed() + (TEMP_BED_WINDOW))    thermalManager.wait_for_bed_heating());
   }
 
 #endif
diff --git a/Marlin/src/module/temperature.cpp b/Marlin/src/module/temperature.cpp
index 1ad0303abd..3c8d55c630 100644
--- a/Marlin/src/module/temperature.cpp
+++ b/Marlin/src/module/temperature.cpp
@@ -499,7 +499,7 @@ volatile bool Temperature::raw_temps_ready = false;
    * Needs sufficient heater power to make some overshoot at target
    * temperature to succeed.
    */
-  void Temperature::PID_autotune(const_float_t target, const heater_id_t heater_id, const int8_t ncycles, const bool set_result/*=false*/) {
+  void Temperature::PID_autotune(const celsius_t target, const heater_id_t heater_id, const int8_t ncycles, const bool set_result/*=false*/) {
     float current_temp = 0.0;
     int cycles = 0;
     bool heating = true;
@@ -3815,10 +3815,10 @@ void Temperature::isr() {
       #define MIN_DELTA_SLOPE_TIME_PROBE 600
     #endif
 
-    bool Temperature::wait_for_probe(const_float_t target_temp, bool no_wait_for_cooling/*=true*/) {
+    bool Temperature::wait_for_probe(const celsius_t target_temp, bool no_wait_for_cooling/*=true*/) {
 
-      const bool wants_to_cool = isProbeAboveTemp(target_temp);
-      const bool will_wait = !(wants_to_cool && no_wait_for_cooling);
+      const bool wants_to_cool = isProbeAboveTemp(target_temp),
+                 will_wait = !(wants_to_cool && no_wait_for_cooling);
       if (will_wait)
         SERIAL_ECHOLNPAIR("Waiting for probe to ", (wants_to_cool ? PSTR("cool down") : PSTR("heat up")), " to ", target_temp, " degrees.");
 
diff --git a/Marlin/src/module/temperature.h b/Marlin/src/module/temperature.h
index 318cdaf075..a7d41b36f9 100644
--- a/Marlin/src/module/temperature.h
+++ b/Marlin/src/module/temperature.h
@@ -358,12 +358,8 @@ class Temperature {
       static bool allow_cold_extrude;
       static celsius_t extrude_min_temp;
       static inline bool tooCold(const celsius_t temp) { return allow_cold_extrude ? false : temp < extrude_min_temp - (TEMP_WINDOW); }
-      static inline bool tooColdToExtrude(const uint8_t E_NAME) {
-        return tooCold(degHotend(HOTEND_INDEX));
-      }
-      static inline bool targetTooColdToExtrude(const uint8_t E_NAME) {
-        return tooCold(degTargetHotend(HOTEND_INDEX));
-      }
+      static inline bool tooColdToExtrude(const uint8_t E_NAME)       { return tooCold(wholeDegHotend(HOTEND_INDEX)); }
+      static inline bool targetTooColdToExtrude(const uint8_t E_NAME) { return tooCold(degTargetHotend(HOTEND_INDEX)); }
     #else
       static inline bool tooColdToExtrude(const uint8_t) { return false; }
       static inline bool targetTooColdToExtrude(const uint8_t) { return false; }
@@ -635,6 +631,10 @@ class Temperature {
       return TERN0(HAS_HOTEND, temp_hotend[HOTEND_INDEX].celsius);
     }
 
+    static inline celsius_t wholeDegHotend(const uint8_t E_NAME) {
+      return TERN0(HAS_HOTEND, static_cast<celsius_t>(temp_hotend[HOTEND_INDEX].celsius + 0.5f));
+    }
+
     #if ENABLED(SHOW_TEMP_ADC_VALUES)
       static inline int16_t rawHotendTemp(const uint8_t E_NAME) {
         return TERN0(HAS_HOTEND, temp_hotend[HOTEND_INDEX].raw);
@@ -687,11 +687,11 @@ class Temperature {
       #endif
 
       static inline bool still_heating(const uint8_t e) {
-        return degTargetHotend(e) > TEMP_HYSTERESIS && ABS(degHotend(e) - degTargetHotend(e)) > TEMP_HYSTERESIS;
+        return degTargetHotend(e) > TEMP_HYSTERESIS && ABS(wholeDegHotend(e) - degTargetHotend(e)) > TEMP_HYSTERESIS;
       }
 
-      static inline bool degHotendNear(const uint8_t e, const_float_t temp) {
-        return ABS(degHotend(e) - temp) < (TEMP_HYSTERESIS);
+      static inline bool degHotendNear(const uint8_t e, const celsius_t temp) {
+        return ABS(wholeDegHotend(e) - temp) < (TEMP_HYSTERESIS);
       }
 
     #endif // HAS_HOTEND
@@ -702,6 +702,7 @@ class Temperature {
         static inline int16_t rawBedTemp()    { return temp_bed.raw; }
       #endif
       static inline celsius_t degBed()        { return temp_bed.celsius; }
+      static inline celsius_t wholeDegBed()   { return static_cast<celsius_t>(degBed() + 0.5f); }
       static inline celsius_t degTargetBed()  { return temp_bed.target; }
       static inline bool isHeatingBed()       { return temp_bed.target > temp_bed.celsius; }
       static inline bool isCoolingBed()       { return temp_bed.target < temp_bed.celsius; }
@@ -726,8 +727,8 @@ class Temperature {
 
       static void wait_for_bed_heating();
 
-      static inline bool degBedNear(const_float_t temp) {
-        return ABS(degBed() - temp) < (TEMP_BED_HYSTERESIS);
+      static inline bool degBedNear(const celsius_t temp) {
+        return ABS(wholeDegBed() - temp) < (TEMP_BED_HYSTERESIS);
       }
 
     #endif // HAS_HEATED_BED
@@ -737,9 +738,10 @@ class Temperature {
         static inline int16_t rawProbeTemp()    { return temp_probe.raw; }
       #endif
       static inline celsius_t degProbe()        { return temp_probe.celsius; }
-      static inline bool isProbeBelowTemp(const_float_t target_temp) { return temp_probe.celsius < target_temp; }
-      static inline bool isProbeAboveTemp(const_float_t target_temp) { return temp_probe.celsius > target_temp; }
-      static bool wait_for_probe(const_float_t target_temp, bool no_wait_for_cooling=true);
+      static inline celsius_t wholeDegProbe()   { return static_cast<celsius_t>(degProbe() + 0.5f); }
+      static inline bool isProbeBelowTemp(const celsius_t target_temp) { return wholeDegProbe() < target_temp; }
+      static inline bool isProbeAboveTemp(const celsius_t target_temp) { return wholeDegProbe() > target_temp; }
+      static bool wait_for_probe(const celsius_t target_temp, bool no_wait_for_cooling=true);
     #endif
 
     #if WATCH_PROBE
@@ -753,6 +755,7 @@ class Temperature {
         static inline int16_t rawChamberTemp()      { return temp_chamber.raw; }
       #endif
       static inline celsius_t degChamber()          { return temp_chamber.celsius; }
+      static inline celsius_t wholeDegChamber()     { return static_cast<celsius_t>(degChamber() + 0.5f); }
       #if HAS_HEATED_CHAMBER
         static inline celsius_t degTargetChamber()  { return temp_chamber.target; }
         static inline bool isHeatingChamber()       { return temp_chamber.target > temp_chamber.celsius; }
@@ -779,6 +782,7 @@ class Temperature {
         static inline int16_t rawCoolerTemp()     { return temp_cooler.raw; }
       #endif
       static inline celsius_t degCooler()         { return temp_cooler.celsius; }
+      static inline celsius_t wholeDegCooler()    { return static_cast<celsius_t>(temp_cooler.celsius + 0.5f); }
       #if HAS_COOLER
         static inline celsius_t degTargetCooler() { return temp_cooler.target; }
         static inline bool isLaserHeating()       { return temp_cooler.target > temp_cooler.celsius; }
@@ -827,7 +831,7 @@ class Temperature {
         static bool pid_debug_flag;
       #endif
 
-      static void PID_autotune(const_float_t target, const heater_id_t heater_id, const int8_t ncycles, const bool set_result=false);
+      static void PID_autotune(const celsius_t target, const heater_id_t heater_id, const int8_t ncycles, const bool set_result=false);
 
       #if ENABLED(NO_FAN_SLOWING_IN_PID_TUNING)
         static bool adaptive_fan_slowing;