PCB Via Current Calculator

Calculate via current capacity. Determine number of vias needed for high-current paths.

Current per Via (A)

Via Drill Diameter (mm)

Copper Plating (μm)

Number of Vias

Max Temp Rise (°C)

Via Length / Board Thickness (mm)

Wall Area: A = π((d/2+t)² – (d/2)²)

Safe Current: ~1.5A/mm² for plating