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Interactive Tool / Trace Width
PCB Trace Width Calculator
Size a trace for its current before DFM flags it. Estimates the minimum copper width for a target current and temperature rise using the IPC-2221 charts.
IPC-2221 estimate: A = (I / (k·ΔT^0.44))^(1/0.725), width = A / (copper thickness in mils). k = 0.048 external, 0.024 internal. A planning figure — confirm against your stack-up and IPC-2152 for high-power nets.
