Coil Inductance

Calculate the inductance of a long coil (solenoid).

Number of Turns

Cross-Section Area (cm²)

Coil Length (cm)

Relative Permeability (air = 1)

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Inductance L = μ₀·μr·N²·A ÷ l for a long solenoid, from the number of turns, cross-section area, length and core relative permeability.