Conductor Resistance Temperature Calculator
Use this resistance-temperature workflow when you already know the conductor resistance basis and coefficient. It does not identify conductor material or select wire size.
- Adjusted resistance
- ohm
- Resistance change
- %
- Temperature change
- deg C
Calculation details
- Calculation basis
- Selection boundary
Recent results
Formulas
- Temperature change = operating temperature - base temperature
- Adjusted resistance = base resistance x (1 + coefficient x temperature change)
- Percent change = (adjusted resistance / base resistance - 1) x 100
Use this calculator
Estimate conductor resistance at a new temperature from base resistance, temperatures, and a temperature coefficient.
Read the result
Review the calculated values with their displayed units and assumptions. The result is a planning aid for the stated inputs, not a final equipment or installation decision.
Check before final work
This resistance-temperature estimate uses a user-supplied linear coefficient. It does not identify material, replace verified conductor data, select a wire, or determine code compliance.
FAQs
Where does the coefficient come from?
Use a verified coefficient for the conductor material and temperature range you are evaluating. This calculator does not look up that value.
Can this select AWG or kcmil?
No. It adjusts a resistance value you provide and does not select conductor size or ampacity.