In observance of the Fourth of July holiday, Fairview Microwave will be closed on Friday, July 3rd. Normal operations will resume on Monday, July 6. 500 Internal Server Error Oops, something went wrong. # Internal server error, refresh the page or contact us if the problem persists. Oops, something went wrong. # Internal server error, refresh the page or contact us if the problem persists. Signing Out Cancel Continue as Guest Fairview Microwave's Coaxial Cable Impedance Calculator allows you to enter the Outer Diameter Dielectric width, Inner conductor Diameter width and either the Dielectric Constant or Velocity of Propagation (VoP) values in order to calculate the impedance of the coax. Bookmark or "Favorite" this coaxial cable impedance calculator page by pressing CTRL + D. Dielectric outer diameter: Inner conductor diameter: Capacitance: Inductance: Fairview Microwave carries hundreds of coaxial RF cables all in-stock and available for same-day shipping worldwide. Choose from 50 Ohm, 75 Ohm, 93 Ohm and 95 Ohm coaxial cables or 78 Ohm and 100 Ohm Twinax cables. Customers can choose to either buy cable in bulk or use our large selection of coax types to construct custom cable assemblies. **Note: Like our coaxial cable impedance calculator, all of our RF calculators allow SI prefix input. For example, if you wish to input "25000000", just type "25M" instead. See the quick-reference table below for all compatible SI prefixes. Prefix Symbol Value Tera 'T' 1012 Giga 'G' 109 Mega 'M' 106 Kilo 'k' 103 Prefix Symbol Value pico 'p' 10-12 nano 'n' 10-9 micro 'u' 10-6 milli 'm' 10-3 Disclaimer: Fairview Microwave’s RF calculators are intended for educational use and for reference only. These RF calculators were designed by engineers and for engineers. Fairview Microwave does not make any claims that the results derived from these RF calculators are sufficient enough to fully design, build or test real products in real-world applications. Join our mailing list Join our mailing list Join our mailing list to receive the latest news and product information First name Last name