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Inductance of Straight Wire & Electrode Calculator

Inductance of Straight Wire & Electrode Calculator

Calculate the Inductance of a Straight Wire or Electrode.

Note: Formulas and equations for this calculator is given below ( after calculator). Also do not forget to share with and suggest to your friends. Also, if you want to see other electrical and electronics calculators live on our blog, then please mention it in our below comment box. thanks.

Enter the required values of length of wire and diameter of wire in inches and click on calculate. Result will display the value of Inductance in µH.

Enter your values:
Length of Wire (l ): Inches
Diameter of Wire (a) : Inches
Inductance: µH

Formula and Equations for Inductance Calculator

L = K x a x [ { ln (2l / a) } – 0.75]


  • L = Inductance in µH
  • K = 0.00508 (dims in inchs) = 0.0002 (dims in mm)
  • = wire radius (inches or mm)
  • l = wire length (inches or mm)
  • ln = Natural Logarithm = 2.303 * Common Log [base 10]


L= 0.00508 x b x (log (2 x b/ (w+h)) +.5+0.2235 x (w+h)/b)


L= 0.00508 x bx (log (2 x b/a)-0.75)


  • L = Inductance in µH
  • b= wire length
  • a = wire diameter

This calculation is based on assuming the electrode or straight wire in Free Space.

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One Comment

  1. Your calculation does not take into account the resistivity of the wire material, aluminium, copper, silver, etc. which will also have an effect on the inductance value.

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