diff --git a/Marlin/dac_mcp4728.cpp b/Marlin/dac_mcp4728.cpp
index 93650eb7c..5ba78e051 100644
--- a/Marlin/dac_mcp4728.cpp
+++ b/Marlin/dac_mcp4728.cpp
@@ -34,7 +34,7 @@
 
 #if ENABLED(DAC_STEPPER_CURRENT)
 
-uint16_t     mcp4728_values[XYZE];
+uint16_t mcp4728_values[XYZE];
 
 /**
  * Begin I2C, get current values (input register and eeprom) of mcp4728
@@ -42,16 +42,13 @@ uint16_t     mcp4728_values[XYZE];
 void mcp4728_init() {
   Wire.begin();
   Wire.requestFrom(int(DAC_DEV_ADDRESS), 24);
-  while(Wire.available()) {
-    int deviceID = Wire.read();
-    int hiByte = Wire.read();
-    int loByte = Wire.read();
+  while (Wire.available()) {
+    char deviceID = Wire.read(),
+         hiByte = Wire.read(),
+         loByte = Wire.read();
 
-    int isEEPROM = (deviceID & 0B00001000) >> 3;
-    int channel = (deviceID & 0B00110000) >> 4;
-    if (isEEPROM != 1) {
-      mcp4728_values[channel] = word((hiByte & 0B00001111), loByte);
-    }
+    if (!(deviceID & 0x08))
+      mcp4728_values[(deviceID & 0x30) >> 4] = word((hiByte & 0x0F), loByte);
   }
 }
 
@@ -71,8 +68,8 @@ uint8_t mcp4728_analogWrite(uint8_t channel, uint16_t value) {
 uint8_t mcp4728_eepromWrite() {
   Wire.beginTransmission(DAC_DEV_ADDRESS);
   Wire.write(SEQWRITE);
-  for (uint8_t channel=0; channel <= 3; channel++) {
-    Wire.write(DAC_STEPPER_VREF << 7 | 0 << 5 | DAC_STEPPER_GAIN << 4 | highByte(mcp4728_values[channel]));
+  for (uint8_t channel = 0; channel < COUNT(channel); channel++) {
+    Wire.write(DAC_STEPPER_VREF << 7 | DAC_STEPPER_GAIN << 4 | highByte(mcp4728_values[channel]));
     Wire.write(lowByte(mcp4728_values[channel]));
   }
   return Wire.endTransmission();
@@ -83,7 +80,7 @@ uint8_t mcp4728_eepromWrite() {
  */
 uint8_t mcp4728_setVref_all(uint8_t value) {
   Wire.beginTransmission(DAC_DEV_ADDRESS);
-  Wire.write(VREFWRITE | value << 3 | value << 2 | value << 1 | value);
+  Wire.write(GAINWRITE | (value ? 0x0F : 0x00));
   return Wire.endTransmission();
 }
 /**
@@ -91,7 +88,7 @@ uint8_t mcp4728_setVref_all(uint8_t value) {
  */
 uint8_t mcp4728_setGain_all(uint8_t value) {
   Wire.beginTransmission(DAC_DEV_ADDRESS);
-  Wire.write(GAINWRITE | value << 3 | value << 2 | value << 1 | value);
+  Wire.write(GAINWRITE | (value ? 0x0F : 0x00));
   return Wire.endTransmission();
 }
 
@@ -105,21 +102,19 @@ uint16_t mcp4728_getValue(uint8_t channel) { return mcp4728_values[channel]; }
  * Return Vout
  *
 uint16_t mcp4728_getVout(uint8_t channel) {
-  uint32_t vref = 2048;
-  uint32_t vOut = (vref * mcp4728_values[channel] * (_DAC_STEPPER_GAIN + 1)) / 4096;
+  uint32_t vref = 2048,
+           vOut = (vref * mcp4728_values[channel] * (_DAC_STEPPER_GAIN + 1)) / 4096;
   if (vOut > defaultVDD) vOut = defaultVDD;
   return vOut;
 }
 */
 
 /* Returns DAC values as a 0-100 percentage of drive strength */
-uint16_t mcp4728_getDrvPct(uint8_t channel) {return (uint16_t)(.5+(((float)mcp4728_values[channel]*100)/DAC_STEPPER_MAX));}
+uint16_t mcp4728_getDrvPct(uint8_t channel) { return uint16_t(100.0 * mcp4728_values[channel] / (DAC_STEPPER_MAX) + 0.5); }
 
 /* Recieves all Drive strengths as 0-100 percent values, updates DAC Values array and calls fastwrite to update the DAC */
 void mcp4728_setDrvPct(int16_t pct[XYZE]) {
-  for (uint8_t i=0; i <= 3; i++) {
-    mcp4728_values[i] = ((float)pct[i] * DAC_STEPPER_MAX)/100;
-  }
+  LOOP_XYZE(i) mcp4728_values[i] = 0.01 * pct[i] * (DAC_STEPPER_MAX);
   mcp4728_fastWrite();
 }
 
@@ -130,7 +125,7 @@ void mcp4728_setDrvPct(int16_t pct[XYZE]) {
  */
 uint8_t mcp4728_fastWrite() {
   Wire.beginTransmission(DAC_DEV_ADDRESS);
-  for (uint8_t channel=0; channel <= 3; channel++) {
+  for (uint8_t channel = 0; channel < COUNT(channel); channel++) {
     Wire.write(highByte(mcp4728_values[channel]));
     Wire.write(lowByte(mcp4728_values[channel]));
   }
diff --git a/Marlin/stepper_dac.cpp b/Marlin/stepper_dac.cpp
index 61e06be96..5443abcd8 100644
--- a/Marlin/stepper_dac.cpp
+++ b/Marlin/stepper_dac.cpp
@@ -73,7 +73,7 @@
 
     NOMORE(val, 100);
 
-    mcp4728_analogWrite(dac_order[channel], val * DAC_STEPPER_MAX / 100);
+    mcp4728_analogWrite(dac_order[channel], val * 0.01 * (DAC_STEPPER_MAX));
     mcp4728_simpleCommand(UPDATE);
   }
 
@@ -86,10 +86,10 @@
     mcp4728_simpleCommand(UPDATE);
   }
 
-  static float dac_perc(int8_t n) { return 100.0 * mcp4728_getValue(dac_order[n]) / DAC_STEPPER_MAX; }
-  static float dac_amps(int8_t n) { return (mcp4728_getDrvPct(dac_order[n])*DAC_STEPPER_MAX) / (8.0 * DAC_STEPPER_SENSE); }
+  static float dac_perc(int8_t n) { return 100.0 * mcp4728_getValue(dac_order[n]) * (1.0 / (DAC_STEPPER_MAX)); }
+  static float dac_amps(int8_t n) { return mcp4728_getDrvPct(dac_order[n]) * (DAC_STEPPER_MAX) * (0.125 * (DAC_STEPPER_SENSE)); }
   
-  int16_t dac_current_get_percent(int8_t axis) {return mcp4728_getDrvPct(dac_order[axis]); }
+  int16_t dac_current_get_percent(AxisEnum axis) { return mcp4728_getDrvPct(dac_order[axis]); }
   void dac_current_set_percents(int16_t pct[XYZE]) {
     LOOP_XYZE(i) dac_channel_pct[i] = pct[dac_order[i]];
     mcp4728_setDrvPct(dac_channel_pct);
diff --git a/Marlin/stepper_dac.h b/Marlin/stepper_dac.h
index 9848d7841..ab338a271 100644
--- a/Marlin/stepper_dac.h
+++ b/Marlin/stepper_dac.h
@@ -51,7 +51,7 @@ void dac_current_percent(uint8_t channel, float val);
 void dac_current_raw(uint8_t channel, uint16_t val);
 void dac_print_values();
 void dac_commit_eeprom();
-int16_t dac_current_get_percent(int8_t axis) ;
+int16_t dac_current_get_percent(AxisEnum axis);
 void dac_current_set_percents(int16_t pct[XYZE]);
 
 #endif // STEPPER_DAC_H
diff --git a/Marlin/ultralcd.cpp b/Marlin/ultralcd.cpp
index ef3e3e92a..2cf83a609 100755
--- a/Marlin/ultralcd.cpp
+++ b/Marlin/ultralcd.cpp
@@ -864,12 +864,12 @@ void kill_screen(const char* lcd_msg) {
    *
    */
   #if ENABLED(DAC_STEPPER_CURRENT)
-    static void dac_driver_getValues() {LOOP_XYZE(i) driverPercent[i] = dac_current_get_percent(i); } 
-  
+    static void dac_driver_getValues() { LOOP_XYZE(i) driverPercent[i] = dac_current_get_percent((AxisEnum)i); }
+
     static void dac_driver_commit() { dac_current_set_percents(driverPercent); }
-  
+
     static void dac_driver_eeprom_write() { dac_commit_eeprom(); }
-    
+
     static void lcd_dac_menu() {
       dac_driver_getValues();
       START_MENU();    
@@ -882,7 +882,6 @@ void kill_screen(const char* lcd_msg) {
       END_MENU();
     }
   #endif
-  
 
   /**
    *