PCB Trace Width Calculator
Calculate the minimum PCB trace width based on current and copper thickness using IPC-2221 guidelines (simplified).
Note: This calculation assumes a 10°C temperature rise and external copper layers. Adjustments for internal layers or higher reliability designs may be necessary.
PCB Trace Width: Why It Matters
Designing a printed circuit board (PCB) isn't just about placing components — the copper traces that carry current must be wide enough to prevent overheating. If a trace is too narrow for the amount of current flowing through it, it can cause excessive heat, leading to circuit failure.
This calculator helps you quickly estimate the minimum trace width required for your PCB, based on the amount of current and copper thickness, following widely used IPC-2221 guidelines.
The simplified formula is:
\[ Width_{trace} = \frac{I}{k \times Th^{0.44}} \]
Disclaimer: These calculators are provided for informational purposes only. Always verify your designs against relevant engineering standards and consult a qualified professional. We do not take responsibility for any errors or damages resulting from the use of these calculations.