PCB Trace Width Calculator
Calculate the minimum PCB trace width needed to safely carry your target current without overheating. Essential for electronics design and PCB layout.
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Frequently Asked Questions
How does this calculator work?
This calculator uses the IPC-2221 standard formula to determine the minimum trace width based on your target current, acceptable temperature rise, and copper weight. The formula considers both internal and external traces.
What is IPC-2221?
IPC-2221 is a generic standard for component mounting and PCB design. It provides formulas for calculating trace width, current capacity, and other electrical parameters for printed circuit boards.
What copper weight should I use?
Standard PCBs typically use 1 oz/ft² copper. High-current applications may use 2 oz/ft² or thicker. Thicker copper allows wider traces to carry more current with less temperature rise.