Calculate minimum PCB trace width for current requirements.
Load Requirements
Current in Amperes (A)
Weight in ounces (oz)
Max heating (°C)
Recommended Geometry
Min Trace Width0.302 mm(11.9 mils)
Recommendation: Use a standard width slightly larger than calculated, e.g., if result is 0.18mm, use 0.2mm or 0.25mm (8-10 mils) for safety margin.
Overview
Trace width calculation ensures traces can carry required current without overheating. Based on IPC-2152 standards. Essential for power supply and high-current circuit design.
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Pro Tips
1 oz copper standard for most boards.
2 oz for high-current applications.
Add thermal relief for heat dissipation.
Consider voltage drop for long traces.
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Fun Facts
"1 amp needs ~10-15 mil (1 oz, 10°C rise)."
"5 amps needs ~80-100 mil (1 oz)."
"High-current: use thicker copper or multiple layers."
"Solder mask affects heat dissipation."
Formula: Width = Current / (Thickness × Current Density)
