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PCB Trace Width Calculator

Calculate the required trace width for your PCB design based on the IPC-2221 standard. Ensure high-speed signal integrity and reliable power delivery before manufacturing.

Design Parameters

A

Calculations are based on the IPC-2221 generic standard. For highly complex HDI or RF designs, consult with NextPCB engineers.

Recommended Trace Width

External Layers

W
0.00 mil

Trace in direct contact with air

Internal Layers

W
0.00 mil

Trace embedded within dielectric

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NextPCB supports ultra-fine copper geometries down to 2mils.

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IPC-2221 Calculation Reference

The calculations utilize the standard IPC-2221 formulas. The required cross-sectional area is determined first, followed by the trace width derived from the selected copper thickness.

  • k = 0.048 for External Layers
  • k = 0.024 for Internal Layers
Area (mils²) = ( Current / ( k * TempRise0.44 ) ) (1/0.725)
Width (mils) = Area / ( CopperThickness_oz * 1.378 )