Coaxial Line Impedance (Z0) Calculator

In order to transmit radio frequency signals coaxial cables are used as transmission lines. This online calculator allows you to calculate the coaxial line impedance (Z0). The resistance of this line in ohms is referred to as characteristic impedance.

Coaxial Line Impedance (Z0) Calculator

mm
mils
mm
mm
(H.m-1)
(H.m-1)
nH/unit len
pF/unit len
Ohms
ps/unit len
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Formula:

Coaxial Line Impedance Image C = ( 2π*e0*er ) / In(do/di) e0 = (1 / c2μr) = 8.88542 pF/m L = (μ0 * μr) * In(do/di) / 2π μ0 = 4π*10-7(henries/meter) Z0 = 1/(2π)*√(e0*er)/(μ0r)*In(do/di) Ohms Tpd = 3.333*√(err) (ns/meter)
where, C = Capacitance er = Relative dielectric constant μr = Relative magnetic permeability Z0 = Impedance L = Inductance Tpd = Propagation Delay if dimension unit is mm then dimension=1. if dimension unit is mils then dimension is 0.0254

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