NTC Thermistor Calculator
Calculate NTC thermistor resistance at a target temperature from calibration resistance, beta value, and tolerance.
Typical resistance–
Minimum–
Maximum–
Input reading–
About beta-value NTC calculations
R = R₀ × exp(B × (1/T − 1/T₀))
T = 1 / (1/T₀ + ln(R/R₀) / B)
Temperatures are converted to kelvin for the calculation. R₀ is the resistance at the calibration temperature T₀, and B (beta) is the material constant from the datasheet. Switch the mode to find resistance at a target temperature, or the temperature implied by a measured resistance; the tolerance gives the resulting min/max band.
The beta equation is a practical approximation over a limited range. For precision sensing across a wide range, use the datasheet resistance table or Steinhart–Hart coefficients instead.