diff --git a/drivers/sensor/ntc_thermistor/ntc_thermistor.c b/drivers/sensor/ntc_thermistor/ntc_thermistor.c
index 8a73f391807..0f003e4a278 100644
--- a/drivers/sensor/ntc_thermistor/ntc_thermistor.c
+++ b/drivers/sensor/ntc_thermistor/ntc_thermistor.c
@@ -55,13 +55,12 @@ static int ntc_thermistor_channel_get(const struct device *dev, enum sensor_chan
 {
 	struct ntc_thermistor_data *data = dev->data;
 	const struct ntc_thermistor_config *cfg = dev->config;
-	uint32_t ohm, max_adc;
+	uint32_t ohm;
 	int32_t temp;
 
 	switch (chan) {
 	case SENSOR_CHAN_AMBIENT_TEMP:
-		max_adc = (1 << (cfg->adc_channel.resolution - 1)) - 1;
-		ohm = ntc_get_ohm_of_thermistor(&cfg->ntc_cfg, max_adc, data->raw);
+		ohm = ntc_get_ohm_of_thermistor(&cfg->ntc_cfg, data->sample_val);
 		temp = ntc_get_temp_mc(&cfg->ntc_cfg.type, ohm);
 		val->val1 = temp / 1000;
 		val->val2 = (temp % 1000) * 1000;
diff --git a/drivers/sensor/ntc_thermistor/ntc_thermistor.h b/drivers/sensor/ntc_thermistor/ntc_thermistor.h
index c8b0642bfb4..a84df840719 100644
--- a/drivers/sensor/ntc_thermistor/ntc_thermistor.h
+++ b/drivers/sensor/ntc_thermistor/ntc_thermistor.h
@@ -56,11 +56,10 @@ int32_t ntc_get_temp_mc(const struct ntc_type *type, unsigned int ohm);
  * @brief Calculate the resistance read from NTC Thermistor
  *
  * @param cfg: NTC Thermistor configuration
- * @param max_adc: Max ADC value
- * @param raw_adc: Raw ADC value read
+ * @sample_mv: Measured voltage in mV
  *
- * @return resistance from raw ADC value
+ * @return Thermistor resistance
  */
-uint32_t ntc_get_ohm_of_thermistor(const struct ntc_config *cfg, uint32_t max_adc, int16_t raw_adc);
+uint32_t ntc_get_ohm_of_thermistor(const struct ntc_config *cfg, int sample_mv);
 
 #endif /* NTC_THERMISTOR_H */
diff --git a/drivers/sensor/ntc_thermistor/ntc_thermistor_calc.c b/drivers/sensor/ntc_thermistor/ntc_thermistor_calc.c
index 347156fb335..2f449544bed 100644
--- a/drivers/sensor/ntc_thermistor/ntc_thermistor_calc.c
+++ b/drivers/sensor/ntc_thermistor/ntc_thermistor_calc.c
@@ -4,6 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
+#include <limits.h>
 #include <stdlib.h>
 #include <zephyr/devicetree.h>
 #include "ntc_thermistor.h"
@@ -97,17 +98,25 @@ static void ntc_lookup_comp(const struct ntc_type *type, unsigned int ohm, int *
  * ntc_get_ohm_of_thermistor() - Calculate the resistance read from NTC Thermistor
  *
  * @cfg: NTC Thermistor configuration
- * @max_adc: Max ADC value
- * @raw_adc: Raw ADC value read
+ * @sample_mv: Measured voltage in mV
  */
-uint32_t ntc_get_ohm_of_thermistor(const struct ntc_config *cfg, uint32_t max_adc, int16_t raw_adc)
+uint32_t ntc_get_ohm_of_thermistor(const struct ntc_config *cfg, int sample_mv)
 {
+	int pullup_mv = cfg->pullup_uv / 1000;
 	uint32_t ohm;
 
+	if (sample_mv <= 0) {
+		return cfg->connected_positive ? INT_MAX : 0;
+	}
+
+	if (sample_mv >= pullup_mv) {
+		return cfg->connected_positive ? 0 : INT_MAX;
+	}
+
 	if (cfg->connected_positive) {
-		ohm = cfg->pulldown_ohm * max_adc / (raw_adc - 1);
+		ohm = cfg->pulldown_ohm * (pullup_mv - sample_mv) / sample_mv;
 	} else {
-		ohm = cfg->pullup_ohm * (raw_adc - 1) / max_adc;
+		ohm = cfg->pullup_ohm * sample_mv / (pullup_mv - sample_mv);
 	}
 
 	return ohm;