# Coaxial Cable Impedance

Online calculator provides the impedance of a coaxial cable in ohms for a given circuit.

In the field of engineering, a coaxial cable is an electrical cable consisting of an inner conductor enclosed by a tubular insulating layer and a tubular conducting shield. This online calculator provides the impedance of a coaxial cable in ohms for a given circuit. Simply enter the required values into the calculator below to determine the coaxial cable impedance, cutoff frequency, capacitance, inductance, and velocity of propagation.

Dielectric Outer Diameter
Inner Conductor Diameter
Dielectric Constant
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7 Number of calculations

• Z = (138 × log10 (d1 / (d2)) / √(R)
• F = 11.8 / (√(R) × π × ((d1 + d2) / 2))
• T =( (7.354 × R) / (log10(d1 / d2)))/0.3048
• D = (140.4 × log10(d1 / d2))/0.3048
• V = (1 / √ (R)) × 100

where,

• Z = Impedance
• d1 = Dielectric Outer Diameter
• d2 = Inner Conductor Diameter
• R = Dielectric Constant
• F = Cutoff Frequency
• T = Capacitance
• D = Inductance
• V = Velocity of Propagation