Differential Pair Impedance Calculator

Calculate differential pair impedance for USB, HDMI, LVDS, and Ethernet. Edge-coupled and broadside-coupled microstrip.

Trace Width W (mm)

Trace Spacing S (mm)

Substrate Height H (mm)

Dielectric ε_r

Copper Thickness T (μm)

Frequency (GHz)

Z_diff ≈ 2Z₀(1-0.48e^-0.96S/H)

Edge-coupled microstrip, IPC-2141 based