diff --git a/Marlin/src/module/temperature.cpp b/Marlin/src/module/temperature.cpp
index 20a08240c..c9547b3e9 100644
--- a/Marlin/src/module/temperature.cpp
+++ b/Marlin/src/module/temperature.cpp
@@ -1232,8 +1232,8 @@ void Temperature::manage_heater() {
   UNUSED(ms);
 }
 
-#define TEMP_AD595(RAW)  ((RAW) * 5.0 * 100.0 / 1024.0 / (OVERSAMPLENR) * (TEMP_SENSOR_AD595_GAIN) + TEMP_SENSOR_AD595_OFFSET)
-#define TEMP_AD8495(RAW) ((RAW) * 6.6 * 100.0 / 1024.0 / (OVERSAMPLENR) * (TEMP_SENSOR_AD8495_GAIN) + TEMP_SENSOR_AD8495_OFFSET)
+#define TEMP_AD595(RAW)  ((RAW) * 5.0 * 100.0 / float(HAL_ADC_RANGE) / (OVERSAMPLENR) * (TEMP_SENSOR_AD595_GAIN) + TEMP_SENSOR_AD595_OFFSET)
+#define TEMP_AD8495(RAW) ((RAW) * 6.6 * 100.0 / float(HAL_ADC_RANGE) / (OVERSAMPLENR) * (TEMP_SENSOR_AD8495_GAIN) + TEMP_SENSOR_AD8495_OFFSET)
 
 /**
  * Bisect search for the range of the 'raw' value, then interpolate