diff --git a/Marlin/Configuration.h b/Marlin/Configuration.h
index 986dcc8ae..80f42a31f 100644
--- a/Marlin/Configuration.h
+++ b/Marlin/Configuration.h
@@ -179,8 +179,8 @@ Here are some standard links for getting your machine calibrated:
 #define BED_MAXTEMP 150
 
 // If you want the M105 heater power reported in watts, define the BED_WATTS, and (shared for all extruders) EXTRUDER_WATTS
-//#define EXTRUDER_WATTS (12.0*12.0/6.7) //  P=I^2/R
-//#define BED_WATTS (12.0*12.0/1.1)      // P=I^2/R
+//#define EXTRUDER_WATTS (12.0*12.0/6.7) // P=U^2/R
+//#define BED_WATTS (12.0*12.0/1.1)      // P=U^2/R
 
 //===========================================================================
 //============================= PID Settings ================================
diff --git a/Marlin/example_configurations/Felix/Configuration.h b/Marlin/example_configurations/Felix/Configuration.h
index 5d81313d7..104033ab5 100644
--- a/Marlin/example_configurations/Felix/Configuration.h
+++ b/Marlin/example_configurations/Felix/Configuration.h
@@ -179,8 +179,8 @@ Here are some standard links for getting your machine calibrated:
 #define BED_MAXTEMP 150
 
 // If you want the M105 heater power reported in watts, define the BED_WATTS, and (shared for all extruders) EXTRUDER_WATTS
-//#define EXTRUDER_WATTS (12.0*12.0/6.7) //  P=I^2/R
-//#define BED_WATTS (12.0*12.0/1.1)      // P=I^2/R
+//#define EXTRUDER_WATTS (12.0*12.0/6.7) // P=U^2/R
+//#define BED_WATTS (12.0*12.0/1.1)      // P=U^2/R
 
 //===========================================================================
 //============================= PID Settings ================================
diff --git a/Marlin/example_configurations/Felix/Configuration_DUAL.h b/Marlin/example_configurations/Felix/Configuration_DUAL.h
index b36cdfcd7..2c384228c 100644
--- a/Marlin/example_configurations/Felix/Configuration_DUAL.h
+++ b/Marlin/example_configurations/Felix/Configuration_DUAL.h
@@ -168,8 +168,8 @@ Here are some standard links for getting your machine calibrated:
 #define BED_MAXTEMP 150
 
 // If you want the M105 heater power reported in watts, define the BED_WATTS, and (shared for all extruders) EXTRUDER_WATTS
-//#define EXTRUDER_WATTS (12.0*12.0/6.7) //  P=I^2/R
-//#define BED_WATTS (12.0*12.0/1.1)      // P=I^2/R
+//#define EXTRUDER_WATTS (12.0*12.0/6.7) // P=U^2/R
+//#define BED_WATTS (12.0*12.0/1.1)      // P=U^2/R
 
 //===========================================================================
 //============================= PID Settings ================================
diff --git a/Marlin/example_configurations/Hephestos/Configuration.h b/Marlin/example_configurations/Hephestos/Configuration.h
index e7dd934e3..d372ce95d 100644
--- a/Marlin/example_configurations/Hephestos/Configuration.h
+++ b/Marlin/example_configurations/Hephestos/Configuration.h
@@ -182,8 +182,8 @@ Here are some standard links for getting your machine calibrated:
 #define BED_MAXTEMP 150
 
 // If you want the M105 heater power reported in watts, define the BED_WATTS, and (shared for all extruders) EXTRUDER_WATTS
-//#define EXTRUDER_WATTS (12.0*12.0/6.7) //  P=I^2/R
-//#define BED_WATTS (12.0*12.0/1.1)      // P=I^2/R
+//#define EXTRUDER_WATTS (12.0*12.0/6.7) // P=U^2/R
+//#define BED_WATTS (12.0*12.0/1.1)      // P=U^2/R
 
 //===========================================================================
 //============================= PID Settings ================================
diff --git a/Marlin/example_configurations/Hephestos_2/Configuration.h b/Marlin/example_configurations/Hephestos_2/Configuration.h
index 23cb359ba..e244777ea 100644
--- a/Marlin/example_configurations/Hephestos_2/Configuration.h
+++ b/Marlin/example_configurations/Hephestos_2/Configuration.h
@@ -180,8 +180,8 @@ Here are some standard links for getting your machine calibrated:
 #define BED_MAXTEMP 150
 
 // If you want the M105 heater power reported in watts, define the BED_WATTS, and (shared for all extruders) EXTRUDER_WATTS
-//#define EXTRUDER_WATTS (12.0*12.0/6.7) //  P=I^2/R
-//#define BED_WATTS (12.0*12.0/1.1)      // P=I^2/R
+//#define EXTRUDER_WATTS (12.0*12.0/6.7) // P=U^2/R
+//#define BED_WATTS (12.0*12.0/1.1)      // P=U^2/R
 
 //===========================================================================
 //============================= PID Settings ================================
diff --git a/Marlin/example_configurations/K8200/Configuration.h b/Marlin/example_configurations/K8200/Configuration.h
index ee5ab3f59..6fdc9f076 100644
--- a/Marlin/example_configurations/K8200/Configuration.h
+++ b/Marlin/example_configurations/K8200/Configuration.h
@@ -184,8 +184,8 @@ Here are some standard links for getting your machine calibrated:
 #define BED_MAXTEMP 150
 
 // If you want the M105 heater power reported in watts, define the BED_WATTS, and (shared for all extruders) EXTRUDER_WATTS
-//#define EXTRUDER_WATTS (12.0*12.0/6.7) //  P=I^2/R
-//#define BED_WATTS (12.0*12.0/1.1)      // P=I^2/R
+//#define EXTRUDER_WATTS (12.0*12.0/6.7) // P=U^2/R
+//#define BED_WATTS (12.0*12.0/1.1)      // P=U^2/R
 
 //===========================================================================
 //============================= PID Settings ================================
diff --git a/Marlin/example_configurations/RepRapWorld/Megatronics/Configuration.h b/Marlin/example_configurations/RepRapWorld/Megatronics/Configuration.h
index 422575a1e..377afdf4f 100644
--- a/Marlin/example_configurations/RepRapWorld/Megatronics/Configuration.h
+++ b/Marlin/example_configurations/RepRapWorld/Megatronics/Configuration.h
@@ -179,8 +179,8 @@ Here are some standard links for getting your machine calibrated:
 #define BED_MAXTEMP 150
 
 // If you want the M105 heater power reported in watts, define the BED_WATTS, and (shared for all extruders) EXTRUDER_WATTS
-//#define EXTRUDER_WATTS (12.0*12.0/6.7) //  P=I^2/R
-//#define BED_WATTS (12.0*12.0/1.1)      // P=I^2/R
+//#define EXTRUDER_WATTS (12.0*12.0/6.7) // P=U^2/R
+//#define BED_WATTS (12.0*12.0/1.1)      // P=U^2/R
 
 //===========================================================================
 //============================= PID Settings ================================
diff --git a/Marlin/example_configurations/RigidBot/Configuration.h b/Marlin/example_configurations/RigidBot/Configuration.h
index 100dc6d8a..569e39b81 100644
--- a/Marlin/example_configurations/RigidBot/Configuration.h
+++ b/Marlin/example_configurations/RigidBot/Configuration.h
@@ -179,8 +179,8 @@ Here are some standard links for getting your machine calibrated:
 #define BED_MAXTEMP 150
 
 // If you want the M105 heater power reported in watts, define the BED_WATTS, and (shared for all extruders) EXTRUDER_WATTS
-//#define EXTRUDER_WATTS (12.0*12.0/6.7) //  P=I^2/R
-//#define BED_WATTS (12.0*12.0/1.1)      // P=I^2/R
+//#define EXTRUDER_WATTS (12.0*12.0/6.7) // P=U^2/R
+//#define BED_WATTS (12.0*12.0/1.1)      // P=U^2/R
 
 //===========================================================================
 //============================= PID Settings ================================
diff --git a/Marlin/example_configurations/SCARA/Configuration.h b/Marlin/example_configurations/SCARA/Configuration.h
index 5b5fe1ed5..a663f5230 100644
--- a/Marlin/example_configurations/SCARA/Configuration.h
+++ b/Marlin/example_configurations/SCARA/Configuration.h
@@ -204,8 +204,8 @@ Here are some standard links for getting your machine calibrated:
 #define BED_MAXTEMP 150
 
 // If you want the M105 heater power reported in watts, define the BED_WATTS, and (shared for all extruders) EXTRUDER_WATTS
-#define EXTRUDER_WATTS (2*2/5.9) //  P=I^2/R
-#define BED_WATTS (5.45*5.45/2.2)      // P=I^2/R
+#define EXTRUDER_WATTS (2*2/5.9)       // P=U^2/R
+#define BED_WATTS (5.45*5.45/2.2)      // P=U^2/R
 
 //===========================================================================
 //============================= PID Settings ================================
diff --git a/Marlin/example_configurations/TAZ4/Configuration.h b/Marlin/example_configurations/TAZ4/Configuration.h
index 8b08209c1..e234570a9 100644
--- a/Marlin/example_configurations/TAZ4/Configuration.h
+++ b/Marlin/example_configurations/TAZ4/Configuration.h
@@ -179,8 +179,8 @@ Here are some standard links for getting your machine calibrated:
 #define BED_MAXTEMP 150
 
 // If you want the M105 heater power reported in watts, define the BED_WATTS, and (shared for all extruders) EXTRUDER_WATTS
-//#define EXTRUDER_WATTS (12.0*12.0/6.7) //  P=I^2/R
-//#define BED_WATTS (12.0*12.0/1.1)      // P=I^2/R
+//#define EXTRUDER_WATTS (12.0*12.0/6.7) // P=U^2/R
+//#define BED_WATTS (12.0*12.0/1.1)      // P=U^2/R
 
 //===========================================================================
 //============================= PID Settings ================================
diff --git a/Marlin/example_configurations/WITBOX/Configuration.h b/Marlin/example_configurations/WITBOX/Configuration.h
index ba1d3923b..84c42c0ff 100644
--- a/Marlin/example_configurations/WITBOX/Configuration.h
+++ b/Marlin/example_configurations/WITBOX/Configuration.h
@@ -182,8 +182,8 @@ Here are some standard links for getting your machine calibrated:
 #define BED_MAXTEMP 150
 
 // If you want the M105 heater power reported in watts, define the BED_WATTS, and (shared for all extruders) EXTRUDER_WATTS
-//#define EXTRUDER_WATTS (12.0*12.0/6.7) //  P=I^2/R
-//#define BED_WATTS (12.0*12.0/1.1)      // P=I^2/R
+//#define EXTRUDER_WATTS (12.0*12.0/6.7) // P=U^2/R
+//#define BED_WATTS (12.0*12.0/1.1)      // P=U^2/R
 
 //===========================================================================
 //============================= PID Settings ================================
diff --git a/Marlin/example_configurations/adafruit/ST7565/Configuration.h b/Marlin/example_configurations/adafruit/ST7565/Configuration.h
index 4cbb4a66b..96877a10a 100644
--- a/Marlin/example_configurations/adafruit/ST7565/Configuration.h
+++ b/Marlin/example_configurations/adafruit/ST7565/Configuration.h
@@ -179,8 +179,8 @@ Here are some standard links for getting your machine calibrated:
 #define BED_MAXTEMP 150
 
 // If you want the M105 heater power reported in watts, define the BED_WATTS, and (shared for all extruders) EXTRUDER_WATTS
-//#define EXTRUDER_WATTS (12.0*12.0/6.7) //  P=I^2/R
-//#define BED_WATTS (12.0*12.0/1.1)      // P=I^2/R
+//#define EXTRUDER_WATTS (12.0*12.0/6.7) // P=U^2/R
+//#define BED_WATTS (12.0*12.0/1.1)      // P=U^2/R
 
 //===========================================================================
 //============================= PID Settings ================================
diff --git a/Marlin/example_configurations/delta/biv2.5/Configuration.h b/Marlin/example_configurations/delta/biv2.5/Configuration.h
index 393fb8307..5b5eaea59 100644
--- a/Marlin/example_configurations/delta/biv2.5/Configuration.h
+++ b/Marlin/example_configurations/delta/biv2.5/Configuration.h
@@ -179,8 +179,8 @@ Here are some standard links for getting your machine calibrated:
 #define BED_MAXTEMP 150
 
 // If you want the M105 heater power reported in watts, define the BED_WATTS, and (shared for all extruders) EXTRUDER_WATTS
-//#define EXTRUDER_WATTS (12.0*12.0/6.7) //  P=I^2/R
-//#define BED_WATTS (12.0*12.0/1.1)      // P=I^2/R
+//#define EXTRUDER_WATTS (12.0*12.0/6.7) // P=U^2/R
+//#define BED_WATTS (12.0*12.0/1.1)      // P=U^2/R
 
 //===========================================================================
 //============================= PID Settings ================================
diff --git a/Marlin/example_configurations/delta/generic/Configuration.h b/Marlin/example_configurations/delta/generic/Configuration.h
index 48efa7cda..d4ca7ed30 100644
--- a/Marlin/example_configurations/delta/generic/Configuration.h
+++ b/Marlin/example_configurations/delta/generic/Configuration.h
@@ -179,8 +179,8 @@ Here are some standard links for getting your machine calibrated:
 #define BED_MAXTEMP 150
 
 // If you want the M105 heater power reported in watts, define the BED_WATTS, and (shared for all extruders) EXTRUDER_WATTS
-//#define EXTRUDER_WATTS (12.0*12.0/6.7) //  P=I^2/R
-//#define BED_WATTS (12.0*12.0/1.1)      // P=I^2/R
+//#define EXTRUDER_WATTS (12.0*12.0/6.7) // P=U^2/R
+//#define BED_WATTS (12.0*12.0/1.1)      // P=U^2/R
 
 //===========================================================================
 //============================= PID Settings ================================
diff --git a/Marlin/example_configurations/delta/kossel_mini/Configuration.h b/Marlin/example_configurations/delta/kossel_mini/Configuration.h
index ea21a4b42..3fbc9d34c 100644
--- a/Marlin/example_configurations/delta/kossel_mini/Configuration.h
+++ b/Marlin/example_configurations/delta/kossel_mini/Configuration.h
@@ -179,8 +179,8 @@ Here are some standard links for getting your machine calibrated:
 #define BED_MAXTEMP 150
 
 // If you want the M105 heater power reported in watts, define the BED_WATTS, and (shared for all extruders) EXTRUDER_WATTS
-//#define EXTRUDER_WATTS (12.0*12.0/6.7) //  P=I^2/R
-//#define BED_WATTS (12.0*12.0/1.1)      // P=I^2/R
+//#define EXTRUDER_WATTS (12.0*12.0/6.7) // P=U^2/R
+//#define BED_WATTS (12.0*12.0/1.1)      // P=U^2/R
 
 //===========================================================================
 //============================= PID Settings ================================
diff --git a/Marlin/example_configurations/delta/kossel_pro/Configuration.h b/Marlin/example_configurations/delta/kossel_pro/Configuration.h
index 54a9bcb4c..d773bdc75 100644
--- a/Marlin/example_configurations/delta/kossel_pro/Configuration.h
+++ b/Marlin/example_configurations/delta/kossel_pro/Configuration.h
@@ -183,8 +183,8 @@ Here are some standard links for getting your machine calibrated:
 #define BED_MAXTEMP 150
 
 // If you want the M105 heater power reported in watts, define the BED_WATTS, and (shared for all extruders) EXTRUDER_WATTS
-//#define EXTRUDER_WATTS (12.0*12.0/6.7) //  P=I^2/R
-//#define BED_WATTS (12.0*12.0/1.1)      // P=I^2/R
+//#define EXTRUDER_WATTS (12.0*12.0/6.7) // P=U^2/R
+//#define BED_WATTS (12.0*12.0/1.1)      // P=U^2/R
 
 //===========================================================================
 //============================= PID Settings ================================
diff --git a/Marlin/example_configurations/delta/kossel_xl/Configuration.h b/Marlin/example_configurations/delta/kossel_xl/Configuration.h
index 521411865..af72ca466 100644
--- a/Marlin/example_configurations/delta/kossel_xl/Configuration.h
+++ b/Marlin/example_configurations/delta/kossel_xl/Configuration.h
@@ -202,8 +202,8 @@ Here are some standard links for getting your machine calibrated:
 #define BED_MAXTEMP 150
 
 // If you want the M105 heater power reported in watts, define the BED_WATTS, and (shared for all extruders) EXTRUDER_WATTS
-//#define EXTRUDER_WATTS (12.0*12.0/6.7) //  P=I^2/R
-//#define BED_WATTS (12.0*12.0/1.1)      // P=I^2/R
+//#define EXTRUDER_WATTS (12.0*12.0/6.7) // P=U^2/R
+//#define BED_WATTS (12.0*12.0/1.1)      // P=U^2/R
 
 //===========================================================================
 //============================= PID Settings ================================
diff --git a/Marlin/example_configurations/makibox/Configuration.h b/Marlin/example_configurations/makibox/Configuration.h
index cf8aa8fb5..ad4afeade 100644
--- a/Marlin/example_configurations/makibox/Configuration.h
+++ b/Marlin/example_configurations/makibox/Configuration.h
@@ -179,8 +179,8 @@ Here are some standard links for getting your machine calibrated:
 #define BED_MAXTEMP 150
 
 // If you want the M105 heater power reported in watts, define the BED_WATTS, and (shared for all extruders) EXTRUDER_WATTS
-//#define EXTRUDER_WATTS (12.0*12.0/6.7) //  P=I^2/R
-//#define BED_WATTS (12.0*12.0/1.1)      // P=I^2/R
+//#define EXTRUDER_WATTS (12.0*12.0/6.7) // P=U^2/R
+//#define BED_WATTS (12.0*12.0/1.1)      // P=U^2/R
 
 //===========================================================================
 //============================= PID Settings ================================
diff --git a/Marlin/example_configurations/tvrrug/Round2/Configuration.h b/Marlin/example_configurations/tvrrug/Round2/Configuration.h
index f24d1fac9..ef81cb828 100644
--- a/Marlin/example_configurations/tvrrug/Round2/Configuration.h
+++ b/Marlin/example_configurations/tvrrug/Round2/Configuration.h
@@ -179,8 +179,8 @@ Here are some standard links for getting your machine calibrated:
 #define BED_MAXTEMP 150
 
 // If you want the M105 heater power reported in watts, define the BED_WATTS, and (shared for all extruders) EXTRUDER_WATTS
-//#define EXTRUDER_WATTS (12.0*12.0/6.7) //  P=I^2/R
-//#define BED_WATTS (12.0*12.0/1.1)      // P=I^2/R
+//#define EXTRUDER_WATTS (12.0*12.0/6.7) // P=U^2/R
+//#define BED_WATTS (12.0*12.0/1.1)      // P=U^2/R
 
 //===========================================================================
 //============================= PID Settings ================================