PCB Trace DCR

Calculate PCB copper trace resistance, resistance-per-cm, voltage drop, and power dissipation

Trace Geometry

Electrical & Thermal

V
A
°C

Advanced Copper Properties

nΩ·m
1/°C
PCB Trace Cross-SectionGeometry uses live unit toggle (metric display)PCB substrateCopper trace x 1w = 3.5 mmt = 35 umDimensionsLength100 mmSingle-trace area0 mm2Effective area0 mm2ResistanceR @ T0 µΩ0 nΩ/cmR @ T_ref0 µΩ0 nΩ/cmElectricalCurrent2 ACurrent density0 A/mm²Input voltage12 VV_drop0 nVV_drop (%)0 %Power loss0 nWConductor T25 °CReference T20 °CResistivity @ Ref T17.24 nΩ·mT Coefficient0.0039 1/°CSide view length axis (R proportional to L)
Design looks good

Resistance vs Width

Resistance vs Temperature

Created by Catlynn Nguyen & Jie Chai · 2026