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Electrical

Resistor Temperature Coefficient Calculator

Estimate resistance at a new temperature using a linear temperature coefficient.

Ideal component relationshipsUnits and assumptions explained below
Circuit workbench
Circuit workbench

Keep RMS, peak and DC values distinct.

See the method

Enter circuit values

Runs on your device

Your circuit result

Your result

Let’s calculate.

Use the Calculate button to see your result.

Review the method below for assumptions and conventions.

How to use this tool

  1. Enter reference resistance, coefficient, temperature change.
  2. Select Calculate to view the result.
  3. Check the method and assumptions below before using the result.

The method, explained

R = Rref × (1 + coefficient×10⁻⁶×temperature change).

A WORKED EXAMPLE

Using reference resistance = 1000 Ω, coefficient = 100 ppm/°C, temperature change = 50 °C, the result is 1005 Ω. Change these example inputs to match your task; use the method above to check each step.

Understanding your result

A linear approximation over a limited temperature range. Use the component datasheet coefficient and operating range.

What to keep in mind

A linear approximation over a limited temperature range. Use the component datasheet coefficient and operating range. Ideal-component calculation for study and estimation. It does not select safe wiring, protective devices or component ratings for an installation.

Common questions

How do I use this resistor temperature coefficient calculator?

Estimate resistance at a new temperature using a linear temperature coefficient. Enter reference resistance in Ω, coefficient in ppm/°C, temperature change in °C. The starting example is editable; use values for the same system or project.

Which assumptions affect this result?

A linear approximation over a limited temperature range. Use the component datasheet coefficient and operating range.

Methodology maintained by ClarityKit. How these tools are built and checked.