Enter your thermistor type, reference resistance, beta coefficient (β), and target temperature to calculate the resistance at your target temperature — plus min/max resistance, resistance change, and temperature coefficient so you have the full picture of how your thermistor behaves across its range.
Resistance at Target Temperature
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Minimum Resistance
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Maximum Resistance
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Resistance Change
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Temperature Coefficient
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NTC (Negative Temperature Coefficient) thermistors decrease resistance as temperature increases, while PTC (Positive Temperature Coefficient) thermistors increase resistance with temperature. NTC thermistors are more commonly used for temperature sensing applications.
The beta coefficient (β) is a material constant that defines the thermistor's temperature sensitivity. It typically ranges from 3000-4500 K and is crucial for accurate temperature calculations using the Steinhart-Hart equation.
The beta coefficient is usually specified in the thermistor's datasheet. If not available, it can be calculated by measuring resistance at two known temperatures and using the beta equation.
You can use either Celsius (°C) or Kelvin (K). The calculator automatically converts between units, but remember that the beta coefficient equation requires absolute temperature (Kelvin) internally.
Thermistors can achieve accuracy of ±0.1°C to ±1°C depending on calibration, beta coefficient accuracy, and circuit design. Proper calibration at the reference temperature is essential for best accuracy.
Resistance tolerance affects temperature measurement accuracy. A 5% resistance tolerance can result in several degrees of temperature error, so tight tolerance thermistors are preferred for precision applications.
The most common reference temperature is 25°C (298.15 K), as this is standard room temperature and widely used in datasheets for specifying nominal resistance values.
Yes, the calculator works for any temperature within the thermistor's operating range. However, ensure your target temperature is within the device's specified limits to maintain accuracy and prevent damage.