# Coaxial Cable Impedance Calculator

In Engineering, Coaxial cable is a type of electrical cable that has an inner conductor surrounded by a tubular insulating layer, surrounded by a tubular conducting shield. Given here is an online coaxial cable impedance calculator to calculate the impedance of the coaxial cable in a circuit in terms of ohms. Just input the required values in the below calculator to determine the values of coaxial cable impedance, cutoff frequency, capacitance, inductance and velocity of propagation.

In Engineering, Coaxial cable is a type of electrical cable that has an inner conductor surrounded by a tubular insulating layer, surrounded by a tubular conducting shield. Given here is an online coaxial cable impedance calculator to calculate the impedance of the coaxial cable in a circuit in terms of ohms. Just input the required values in the below calculator to determine the values of coaxial cable impedance, cutoff frequency, capacitance, inductance and velocity of propagation.

Code to add this calci to your website

#### Formula:

Z = (138 × log_{10} (d_{1} / (d_{2})) / √(R)
F = 11.8 / (√(R) × π × ((d_{1} + d_{2}) / 2))
T =( (7.354 × R) / (log_{10}(d_{1} / d_{2})))/0.3048
D = (140.4 × log_{10}(d_{1} / d_{2}))/0.3048
V = (1 / √ (R)) × 100
**Where,**
Z = Impedance
d_{1} = Dielectric Outer Diameter
d_{2} = Inner Conductor Diameter
R = Dielectric Constant
F = Cutoff Frequency
T = Capacitance
D = Inductance
V = Velocity of Propagation
The coaxial cables generally fall into three main classes; 50 ohms, 75 ohms, and 95 ohms. However for most commercial RF applications 50 ohms coax cable has been taken as the standard for many years. This Coaxial cable impedance calculator will give you consistently reliable results.