Twisted-Pair Impedance Calculator

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Wire Diameter

Spacing

Dielectric (εr)

RESULTS

- Ω

Delay

- ns/in

Inductance

- nH/in

Capacitance

- pF/in

Zo = (120 / √εr) × ln(2S / D)
Delay = 84.72 × 10⁻³ × √εr
L = 10.16 × ln(2S / D)
C = (0.7065 × εr) / ln(2S / D)

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Twisted-Pair Impedance Calculator is a free online calculator tool. Use it to get instant, accurate results for your electronics calculations.