PCB Trace Width Calculator

Calculate the required trace width for a given current capacity based on IPC-2221 standards.

Input Parameters

Target Current (Amps)

Copper Thickness (oz/ft²)

(1 oz = 1.37 mils)

Allowable Temp Rise (°C)

Trace Location

This calculator uses the IPC-2221 (formerly IPC-D-275) formulas to estimate the required trace width. Note that results are estimates and actual performance may vary based on PCB material and environmental factors.

Calculation Results

Required Width (mm)

0.302

Width (mils)

11.89

Area (sq mils)

16.30

Design Margin Recommendation

It is generally recommended to add a 10-20% margin to the calculated trace width for safety and manufacturing tolerances.

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