CHEMANDY ELECTRONICS Suppliers of the unusual

Flat Wire Inductance Calculator

The inductance of a flat or ribbon wire (rectangular cross section), can be found using the calculator or the formula given below.


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

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The inductance of a flat or ribbon wire or a track on a PCB can be calculated with the following formula.

[Flat wire inductance formula]

Where l is the Length in cm

w is the Width in cm

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

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 in the calculator have been changed from µH to nH and the thickness from cm to mm for easier working on PCB's.

This calculator is provided free by Chemandy Electronics in order to promote the FLEXI-BOX

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