Coaxial Cable Parameters

Calculate characteristic impedance, capacitance, inductance, and velocity factor for coaxial cable.

Inner conductor diameter (mm)

Outer conductor inner dia. (mm)

Dielectric Material

Characteristic Impedance (Z₀)

59.788 Ω

Capacitance per meter

192.93 pF/m

Inductance per meter

130.26 nH/m

Velocity Factor (VF)

0.6652

66.52% of c

D/d ratio

4.48

Z₀ = (138 / √εr) × log₁₀(D/d) Ω

C = (55.6 × εr) / log₁₀(D/d) pF/m

L = 200 × log₁₀(D/d) nH/m

VF = 1/√εr