http://www.fashioningtech.com/profiles/blogs/conductive-thread-overview

These are all awesome tools I found around the interwebs. Hopefully these folks will keep hosting them all the live long day.
http://www.fashioningtech.com/profiles/blogs/conductive-thread-overview
This calculator is from the snug bug… check out the full post here: http://pattythesnugbug.com/2011/circle-skirt-calculator-for-the-drafting-of-full-half-and-34-skirts-with-bonus-grading-worksheet/ Or go straight to the excel calculator here. Keep in mind this calculator works on fabric folded in quarters only.