Most professional engineers and technicians will never have the need to calculate the capacitance, inductance, or
impedance of a coaxial cable since they are usually designing systems using welldefined components that are manufactured
to exacting specifications. Students, hobbyists (Ham radio operators), and research types are probably the ones
most likely to actually plug numbers into a calculator. For those people, I present these equations.
Click here for popular coax cable properties.

Most often used braided flexible (shown at left) and solid tube semirigid (shown at right) types are listed
here. 

Capacitance (C) =
Inductance (L) =
Impedance (Z_{0}) =
Velocity =
(c
= speed of light in a vacuum)
Cutoff Frequency =
Reflection Coefficient =
VSWR =
Peak Voltage =

, where

d = 
outside diameter of inner conductor in inches 
D = 
inside diameter of outer conductor in inches 
S = 
maximum voltage gradient of cable insulation in volts/mil 
ε (ε_{r}) = 
relative dielectric constant 
K = 
safety factor 
f = 
frequency in MHz 
Cable attenuation is the sum of the conductor losses and the dielectric losses per the following
equations.
(NOTE: f=frequency in GHz)
ρ_{r} = 1 for copper, 10 for steel

ρ_{rd} = 
inner conductor material resistivity relative to copper 
ρ_{rD} = 
outer conductor material resistivity relative to copper 
δ = 
loss tangent 

