This calculator calculate the resistance of a copper trace based on width, length, thickness and temperature. The resistance of a trace is important to estimate the power dissipate in a trace or to estimate roughly the voltage drop from a voltage supply based on the current flowing through the trace. The resistance in real life will vary a bit since conductor are not exactly rectangular. The trace on a printed circuit boards is more of a trapezoidal shape.
The equation for resistance of a rectangular copper trace is :
where :
L = Length
W = Trace width
T = Trace thickness (or height)
Tc = Temperature Coefficient
Temp = Temperature
This calculator used the following resistivity and temperature coefficient for copper :
Resistivity of copper :
Temperature Coefficient of copper :
