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.
Description
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.
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.
When to use NTC Temperature from Resistance
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.
- Measured resistance (Ω)
- Required number input.
- Reference resistance (Ω)
- Required number input.
- Reference temperature (K)
- Required number input.
- Beta parameter (K)
- Required number input.
How NTC Temperature from Resistance works
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. 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
- Temperature K
- The resulting temperature k returned as a number.
- Temperature C
- The resulting temperature c returned as a number.
Limitations and assumptions
- 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.
Alternative or Complementary approaches
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.
References
-
Thermistor — Wikipedia contributors
Similar or alternative tools
- NTC Thermistor Beta Resistance
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.
- 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.
- 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.