Use this electronics calculation for a first-pass component, converter, signal, motor, or sensor estimate when the stated operating conditions and units match the device data.

Reference Resistance (Ω) (Ω)

Required number input.

Beta (K) (K)

Required number input.

Temperature (K) (K)

Required number input.

Reference Temperature (K) (K)

Required number input.

Estimate NTC thermistor resistance with the beta-parameter approximation R=R0 exp[B(1/T−1/T0)] using absolute kelvin temperatures; this is not the full Steinhart–Hart equation. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

Resistance (Ω) (Ω)

The resulting resistance (ω) returned as a number.

• Thermistor resistance equations approximate a specified curve and temperature range. Beta value, Steinhart–Hart coefficients, tolerance, self-heating, lead resistance, thermal lag, aging, and interchangeability determine achievable temperature accuracy.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Check the result against the current datasheet and worst-case operating corners, then verify the circuit or measurement with simulation and bench testing where failure matters.

• Thermistor Beta Resistance

  Estimate NTC thermistor resistance at an absolute temperature using R=R₀ exp[B(1/T−1/T₀)]. Temperatures are kelvin; beta is an approximation over its specified range.

• NTC Temperature from Resistance

  Invert the NTC beta equation to estimate temperature from measured resistance and a reference point. Output is kelvin and Celsius; use a Steinhart–Hart model when greater accuracy is needed.

• GaN HEMT Rds On Tempco

  Calculate average GaN HEMT on-resistance temperature coefficient as percent change per Celsius degree between two measured temperatures; this is not a local derivative.