Miscellaneous CalculatorsFree Tool

PCB Trace Resistance Calculator

Provided byOmni Calculatoromnicalculator.com

The PCB trace resistance calculator is the easiest way to calculate the resistance of any trace in a PCB.

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Tech and electronics calculators
Screenshot of PCB Trace Resistance Calculator on Omni Calculator
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About this tool

What PCB Trace Resistance Calculator does

The PCB Trace Resistance Calculator on Omni Calculator determines the electrical resistance of printed circuit board traces by accepting inputs for trace width, length, thickness, and ambient temperature. Users receive a resistance value in ohms, which helps assess signal integrity and voltage drop for their specific PCB design. The tool is designed to be straightforward, applying standard electromagnetic principles to model current flow through conductive pathways on a board. While it defaults to copper traces, it can be adapted for other conductive materials. It also functions as a voltage drop calculator using Ohm's Law, offering a dual-purpose utility for designers and hobbyists. The result provides a practical estimate for design validation without requiring direct measurement of voltage or current in the trace.

Step by step

How to use the Omni Calculator PCB Trace Resistance Calculator

  1. 1

    Enter the trace width in millimeters or mils

  2. 2

    Input the trace length in millimeters or inches

  3. 3

    Specify the trace thickness, typically copper weight or micrometers

  4. 4

    Set the ambient temperature in degrees Celsius or Fahrenheit

  5. 5

    View the calculated resistance in ohms and the optional voltage drop result

Is it right for you

Best for

Engineers, hobbyists, and PCB designers who need a quick, material-adaptable estimate of trace resistance for signal integrity or voltage drop analysis without manual calculations.

Limitations

  • Results are estimates based on standard electromagnetic models
  • Requires known physical dimensions; unavailable for pre-existing board traces
  • Default assumes copper; other material resistivities must be manually adjusted
Questions

PCB Trace Resistance Calculator FAQ

Can this calculator work with materials other than copper?
Yes, the tool can be adapted for other conductive materials by changing the resistivity value, though it defaults to copper as the standard PCB trace material.
What units are accepted for trace width and thickness?
The calculator accepts width and thickness in millimeters or mils, and length in millimeters or inches, allowing flexibility based on user preference.
How does ambient temperature affect the resistance calculation?
The calculator includes a temperature coefficient factor that adjusts the resistance value based on the ambient temperature entered, accounting for the thermal expansion of the conductor.
Does the tool provide voltage drop information along with resistance?
Yes, the calculator doubles as a voltage drop tool using Ohm's Law, providing the voltage drop result once the trace current is specified.
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