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🔌 PCB Trace Width Calculator
Calculate PCB trace width from current, temperature rise, and copper weight using IPC-2221.
IPC-2221 Trace Width Calculation
The IPC-2221 standard provides formulas for minimum PCB trace width based on current capacity. The cross-sectional area is calculated as A = (I / (k × ΔT^0.44))^(1/0.725), where k is 0.048 for external layers and 0.024 for internal layers. Trace width equals the area divided by copper thickness (1 oz copper = 1.378 mils).
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