This tool calculates the resistance, voltage drop, and power loss of printed circuit board vias. Note that vias are made out of plated copper which typically has a resistivity of 1.7E-6 to 2.2E-6 Ohm-cm. The calculator has an input box for the resistivity which defaults to 1.9E-6 Ohm-cm.

Finished Hole Dia:
Plating Thickness:
Via Length:
Optional Inputs
Applied Current: Amps
Plating Resistivity: Ohm-cm
Electrical Results
Resistance: Ohms
Voltage Drop: Volts
Power Loss: Watts
Estimated Ampacity: Amps
Thermal Results
Thermal Resistance: Deg. C/Watt
Enter the values ​​and the fields will be updated in real time!