Trace Resistance

PCB Trace Resistance Calculator

Trace Resistance

Trace Width
W
Trace Length
L
Trace Thickness
T
Temperature
Temp

Output

Resistance (R):

Introduction

The purpose of this calculator is to solve the resistance of a copper conductor based upon physical dimensions. The resistance of a trace can be useful in many ways. The power dissipation in a trace is calculated after one has determined the trace resistance. The trace resistance can also be helpful if a circuit requires precision resistors and the pcb traces cab effect the resistance value.

The equation for resistance of a rectangular conductor is:

R=\rho \cdot \frac{L}{T\cdot W}\cdot \left ( 1+tc\cdot \left ( temp-25 \right ) \right )

Where

\rho=resistivity

L= length

W=trace width

T=trace height

Resistivity of Copper is: 1.7E-6 ohm-cm
Temp_Co of Copper is: 3.9E-3 ohm/ohm/C

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