Calculate PCB trace impedance for controlled impedance designs.
Trace Geometry
mm
mm (Substrate thickness)
oz (1 oz ≈ 0.035mm)
FR4 is usually 4.2 - 4.6
GND
H
W
Result
Impedance (Zo)128.1 Ω
SignalCustom
Overview
PCB trace impedance depends on trace width, thickness, dielectric constant, and distance to reference plane. Essential for high-speed digital and RF designs. Common values: 50Ω, 75Ω, 100Ω differential.
