Inductance Calculator

Select the box with the geometry that you would like to calculate.

Round-Wire geometries (loops of wire with various shapes)
Circular Loop	Rectangular Loop	Square Loop	Equilateral Triangle Loop	Isosceles Triangle Loop

Transmission Line geometries (cross sections) the values calculated are the inductance per unit length
Twin Lead	Round Wire over a Ground Plane	Vertically Spaced Traces	Wide Trace over a Ground Plane	Coplanar Traces

In all cases, the current is assumed to flow in the outer surface of the conductors.
The approximate formulas used to calculate the inductance are provided along with restrictions on the relative size of the various parameters.

All the units are in SI (Iternational System):

• [m] = meter
• [H] = Henry

Reference and sources:

- http://emclab.mst.edu/inductance/
- Inductance Calculations by F. W. Grover.

Calculators:

• Inductance of Circular Loop
• Inductance of Coplanar Traces
• Inductance of Equilateral Triangle Loop
• Inductance of Isosceles Triangle Loop
• Inductance of Rectangular Loop
• Inductance of Round Wire over a Ground Plane
• Inductance of Square Loop
• Inductance of Twin Lead
• Inductance of Vertically Spaced Traces
• Inductance of Wide Trace over a Ground Plane