Hi, I'm trying to calculate the length of wire that I need to wound a coil using a spool and wire of known dimensions. I was trying to use this converter but I'm not getting good results: http://www.had2know.com/technology/solenoid-coil-wire-calculator.html For instance: with a wire radius of 0.32258 mm (22 AWG), cylinder radius of 12mm, cylinder length of 33mm and 100 layers (which I'm assuming is the number of turns) I'm getting about 1419179mm of length which is about 4656 feet of wire. This number seems exaggerated to me. I really don't care about parameters such as magnetic flux, force or current for that matter. I just want to know the length of wire I need to be able to wound the coil using a drill and not take ages doing it manually. Help would be greatly appreciated. Thanks.