Resistance Temperature Calculator

How Resistance Temperature works

The calculation starts with R = R₀ × (1 + αΔT). Resistance Temperature uses Reference resistance, Temperature coefficient, Temperature change to report Resistance at new temperature. Continue to Ohm's Law Calculator for voltage.

With the loaded values, resistance at new temperature evaluates to 119.25 Ω. Change only the quantity being investigated.

Inputs for Resistance Temperature

Reference resistance, Temperature coefficient, and Temperature change belong to Resistance Temperature. Keep source units with reference resistance.

The preset case is instructional rather than prescriptive. Enter the applicable electrical data.

Reference resistance

Example entry: 100 Ω.

Temperature coefficient

Example entry: 0.00385 /°C.

Temperature change

Example entry: 50 °C.

Reading the Resistance Temperature result

This output represents Resistance Temperature.

Standard size, duty, temperature, and transient checks remain outside this single equation. Use Conductor Resistance Calculator.

Measurement and units

Use measured values and keep prefixes such as milli, kilo, and mega consistent before calculating. Check prefixes on reference resistance. For current through R1, use Current Divider Calculator.

Keep the same electrical reference points across saved cases.

Limits of this calculation

The linear coefficient is an approximation over a limited temperature range.

A complete system can contain effects that this equation does not represent. Unentered effects remain outside Resistance Temperature.

A useful Resistance Temperature comparison

Record resistance at new temperature before testing a different reference resistance value.

Document the alternate reference resistance source. Compare this result with Electrical Energy Calculator when electrical energy is also needed.

Questions about Resistance Temperature