Cable Impedance Calculator — Characteristic Impedance
Calculate characteristic impedance of audio cables from cable parameters.
Check cable manufacturer spec sheet
Typically 50-150 pF/m for audio cables
How We Calculate This
Characteristic Impedance
Z0 = √(L / C)
where L is inductance per metre (H/m) and C is capacitance per metre (F/m).
Propagation Delay
Delay = √(L × C) in seconds per metre
Velocity Factor
The signal speed as a percentage of the speed of light. Most cables have a velocity factor of 60-80%.
Frequently Asked Questions
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Last updated: February 2026
All calculations are estimates based on standard formulas. Always verify results for critical applications.