How to use the resistance change with temperature calculator
Find how a resistor or wire changes resistance when its temperature changes. Enter resistance at reference temperature, temperature coefficient, temperature change in the fields above; the resistance after change, resistance change are computed instantly and plotted on the chart so you can see how the answer changes.
Common searches this calculator answers include “resistance temperature coefficient”, “RTD resistance change”, “copper wire resistance heat”, “calculate resistance change with temperature”, “find resistance after change”.
Formula
Variables
- R0 — Resistance at reference temperature (Ω)
- al — Temperature coefficient (1/K)
- dT — Temperature change (K)
Worked example
With resistance at reference temperature = 100 Ω, temperature coefficient = 0.00393 1/K, temperature change = 50 K, the calculator gives resistance after change ≈ 119.65 Ω; resistance change ≈ 19.65 %.
Frequently asked questions
What is the resistance change with temperature calculator used for?
Find how a resistor or wire changes resistance when its temperature changes. It helps with questions such as “resistance temperature coefficient”, “RTD resistance change”, “copper wire resistance heat”.
What is the formula for the resistance change with temperature calculation?
Resistance after change (Ω) = R0 × (1+al × dT). Resistance change (%) = al × dT × 100. Here R0 is resistance at reference temperature (Ω), al is temperature coefficient (1/K), dT is temperature change (K).
What inputs do I need for the resistance change with temperature calculator?
You need resistance at reference temperature in Ω, temperature coefficient in 1/K, temperature change in K. Each field is pre-filled with a typical example so you can see how the result responds as you edit the numbers.
How do I use the resistance change with temperature calculator?
Type values into the input fields. Results and the chart update instantly. Use Reset to restore the example values, Copy results to paste them elsewhere, or Share to copy a link that preserves your inputs.
Is the resistance change with temperature result exact?
Calculations use standard formulas and double-precision arithmetic, then display about seven significant figures. Real-world measurements carry uncertainty, so treat results as estimates unless your inputs are exact.