Solenoid Inductance Calculator

Your details

Select which quantity to solve for; the other fields become inputs.
Total number of wire turns wound on the coil.
Inner radius of the coil (half the inner diameter).
mm
Axial length of the winding, measured end to end.
mm
Core material: 1 = air/vacuum, ~10-75 = powdered iron, ~200-5000 = silicon steel or ferrite.
The desired inductance. Fill this in when solving for a geometry dimension or core material.
µH
Current through the coil - used for magnetic field, stored energy, and reactance outputs.
A
AC frequency used to compute inductive reactance X_L = 2 pi f L.
Hz
Inductance (L)
355.3058µH

Self-inductance of the solenoid

Inductance (mH)0.3553mH
Magnetic field (B)5.0265mT
Stored energy (U)0.7106mJ
Inductive reactance (X_L)0.1339Ohm
Winding density (n)2,000turns/m
Inductance (uH)355.3058
B-field (mT)5.0265
Energy (mJ)0.7106

Inductance: 355.3058 uH

  • An inductance of 355.3058 uH falls in the low-millihenry range, found in power-factor-correction circuits.
  • Field at the centre is 5.027 mT at 2 A.
  • The coil stores 0.7106 mJ of magnetic energy at 2 A.
  • At 60 Hz, inductive reactance is 0.1339 Ohm.

Next stepTo increase inductance, add more turns (effect is quadratic) or use a higher-permeability core. To decrease it, shorten the coil or increase its length for the same turn count.

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