When to use this calculator
Estimate resistance change from a supplied linear temperature coefficient. Linear approximation over a range appropriate to the entered coefficient; not every material behaves linearly.
Explore the dc circuits & components calculators for other questions in this topic. For a related calculation, use the Resistivity Calculator: Recover resistivity from a uniform sample’s resistance and dimensions.
PUTTING IT INTO PRACTICE
Resistance Temperature: a worked example
The values below are an illustrative example, not a recommendation. Replace them with measurements or assumptions that match your question.
| Input | Example value |
|---|---|
| Resistance at reference temperature (Ω) | 100 |
| Temperature coefficient (per K) | 0.004 |
| Temperature change (K) | 25 |
| Result | 110 Ω |
- Check the input labels and enter the example values above.
- Apply the relationship: New resistance = reference resistance × (1+coefficient×temperature change).
- The result is 110 Ω, rounded for display.
How to interpret your result
Linear approximation over a range appropriate to the entered coefficient; not every material behaves linearly.
Ideal component models omit tolerances, heat and parasitic effects. Distinguish nominal energy from usable energy for batteries. Component ratings and installation requirements need separate manufacturer and design checks.
Frequently asked questions
Can these calculations select a safe installation rating?
No. They explain ideal relationships and do not include every thermal, protective or regulatory requirement.
When is the resistance temperature calculator useful?
Estimate resistance change from a supplied linear temperature coefficient. Linear approximation over a range appropriate to the entered coefficient; not every material behaves linearly.
How do I use the resistance temperature calculator?
Enter resistance at reference temperature (ω), temperature coefficient (per k), temperature change (k). The result updates automatically. Use the units shown beside each input; the example values illustrate the method.
Which formula does this calculator use?
New resistance = reference resistance × (1+coefficient×temperature change).
What should I check before using the result?
Linear approximation over a range appropriate to the entered coefficient; not every material behaves linearly.
How are results rounded?
Scalar numbers display up to six decimal places, with scientific notation for very large or small values. Text, fraction, date and schedule outputs use the format described on the tool. Intermediate calculations use JavaScript floating-point arithmetic. Keep sensible precision for your measurements.
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