Flat Wire Inductance Calculator

The inductance of a flat or ribbon wire (rectangular cross section), can be calculated using the following formula. The inductance of a track on a PCB can also be calculated with this.

[Formula for flat wire inductor]

Where l = Length in cm

w = Width in cm

t = thickness in cm(PCB copper @ 1 oz/ft2 = 0.035 mm)

The original for this formula is by F.E. Terman and can be found in the Radio Engineers Handbook, McGraw-Hill, New York, 1945. The units have been changed from H to nH and the thickness from cm to mm for easier working on PCB's.

Enter the Length: cm
Enter the Width: cm Inductance: nH
Enter the Thickness: mm

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