If you're only interested in inductance the calculation is fairly trivial. Sum up the mutual inductances of all pairs of parallel conductors. See, for example, H. M. Greenhouse, "Design of Planar Rectangular Microelectronic Inductors", IEEE Transactions On Parts, Hybrids, and Packaging, vol. PHP-10, No. 2, pp.101-109, June.1974. Roger Shile -----Original Message----- Dear all, dose anybody know which kind of meshing is suitable for analyzing of square spiral inductor by using MemHenry(covantarware)? Many thanks and Best Regards