The DC resistance of a PCB trace depends on the below parameters:
- Trace Material (Material Resistivity)
- Trace Thickness
- Trace Width
- Trace Length
- Temperature
Trace Width and Trace Length combined together gives the Cross-sectional area of the PCB trace.
As copper is commonly used material for PCB trace, the resistivity of the copper is 1.75 x 10^-8 ohm-meter.
Here is a calculator available to calculate the PCB DC resistance
https://www.allaboutcircuits.com/tools/trace-resistance-calculator/
Formula for calculating the PCB trace resistance is:
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