Coaxial Cable Cutoff Frequency Calculator

Enter the outer and inner conductor diameters along with the relative permittivity of the insulator to calculate the cut-off frequency of the coaxial cable.

Note: The unit of the diameter of the outer and inner conductor must be the same for this calculator to work. They are always in a ratio so will cancel each other out.

  • Outer radius of the co-axial cable (D)
  • Inner radius of the co-axial cable (d)
  • Relative Permittivity (εr)
  • Calculate Reset

Result

  • Cut-off Frequency (fc)
    GHz
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